PanoramicData.NCalcExtensions 3.1.5

dotnet add package PanoramicData.NCalcExtensions --version 3.1.5                
NuGet\Install-Package PanoramicData.NCalcExtensions -Version 3.1.5                
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="PanoramicData.NCalcExtensions" Version="3.1.5" />                
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add PanoramicData.NCalcExtensions --version 3.1.5                
#r "nuget: PanoramicData.NCalcExtensions, 3.1.5"                
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install PanoramicData.NCalcExtensions as a Cake Addin
#addin nuget:?package=PanoramicData.NCalcExtensions&version=3.1.5

// Install PanoramicData.NCalcExtensions as a Cake Tool
#tool nuget:?package=PanoramicData.NCalcExtensions&version=3.1.5                

PanoramicData.NCalcExtensions

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Introduction

This nuget package provides extension functions for NCalc.

The NCalc documentation can be found here (source code) and here (good explanation of built-in functions).

Functions

Function Purpose Notes
all() Returns true if all values match the lambda expression, otherwise false.
any() Returns true if any values match the lambda expression, otherwise false.
canEvaluate() Determines whether ALL of the parameters can be evaluated. This can be used, for example, to test whether a parameter is set.
capitalize() Capitalizes a string.
cast() Cast an object to another (e.g. float to decimal).
changeTimeZone() Change a DateTime's time zone.
concat() Concatenates lists and objects.
contains() Determines whether one string contains another.
convert() Converts the output of parameter 1 into the result of parameter 2.
count() Counts the number of items. Optionally, only count those that match a lambda.
countBy() Counts the number of items by a calculated term.
dateAdd() Add a specified interval to a DateTime.
dateTime() Return the DateTime in the specified format as a string, with an optional offset.
dateTimeAsEpoch() Parses the input DateTime and outputs as seconds since the Epoch (1970-01-01T00:00Z).
dateTimeAsEpochMs() Parses the input DateTime and outputs as milliseconds since the Epoch (1970-01-01T00:00Z).
dictionary() Builds a Dictionary<string, object?> from the parameters provided.
distinct() Returns only distinct items from the input.
endsWith() Determines whether a string ends with another string.
extend() Extends an existing object into a JObject with both the original and additional properties.
first() Returns the first item in a list that matches a lambda or throws a FormatException if no items match.
firstOrDefault() Returns the first item in a list that matches a lambda or null if no items match.
format() Formats strings and numbers as output strings with the specified format.
getProperties() Returns a list of property names for an object.
getProperty() Returns the value of a given property.
humanize() Converts a value to a more readable format.
if() Return one of two values, depending on the input function.
in() Determines whether a value is in a set of other values.
indexOf() Determines the first position of a string within another string.
isGuid() Determines whether a value is a GUID, or is a string that can be converted to a GUID.
isInfinite() Determines whether a value is infinite.
isNaN() Determines whether a value is not a number.
isNull() Determines whether a value is null.
isNullOrEmpty() Determines whether a value is null or empty.
isNullOrWhiteSpace() Determines whether a value is null, empty or white space.
isSet() Determines whether a parameter is set.
itemAtIndex() Determines the item at the given index.
jObject() Creates a JObject from key/value pairs.
join() Joins a list of strings into a single string.
jPath() Selects a single value from a JObject using a JPath expression
last() Determines the last value in an IEnumerable. Throws an Exception if no item matches.
lastIndexOf() Determines the last position of a string within another string.
lastOrDefault() Determines the last value in an IEnumerable. Returns null if no item matches.
length() Determines length of a string or IList.
list() Emits a List<object?> and collapses down lists of lists to a single list.
listOf() Emits a List<T>.
max() Emits the maximum value, ignoring nulls.
maxValue() Emits the maximum possible value for a given numeric type.
min() Emits the minimum value, ignoring nulls.
minValue() Emits the minimum possible value for a given numeric type.
nullCoalesce() Returns the first parameter that is not null, otherwise: null.
orderBy() Orders an IEnumerable by one or more lambda expressions.
padLeft() Pad the left of a string with a character to a desired string length.
parse() Returns the conversion of a string to a new type.
parseInt() Returns an integer version of a string. Deprecated - use parse() or tryParse() instead)
regexGroup() Selects a regex group capture.
regexIsMatch() Determine whether a string matches a regex.
replace() Replace a string with another string.
retrieve() Retrieves a value from storage.
reverse() Reverses an IEnumerable and emits a List<object?>.
sanitize() Sanitizes a string, replacing any characters outside of the allowed set.
select() Converts an IEnumerable using a lambda.
selectDistinct() Converts an IEnumerable using a lambda and removes duplicates.
setProperties() Sets properties on an existing object.
skip() Skips a number of items in a list.
sort() Sorts an IComparable ascending or descending.
split() Splits a string on a given character into a list of strings.
startsWith() Determines whether a string starts with another string.
store() Stores a value for use later in the pipeline.
substring() Retrieves part of a string.
sum() Sums numeric items.
switch() Return one of a number of values, depending on the input function.
take() Takes a number of items from a list.
throw() Throws an NCalcExtensionsException.
timeSpan() Determines the amount of time between two DateTimes.
toDateTime() Converts a string to a UTC DateTime. May take an optional inputTimeZone.
toLower() Converts a string to lower case.
toString() Converts any object to a string.
toUpper() Converts a string to upper case.
try() If a function throws an exception, return an alternate value.
tryParse() Returns a boolean result of an attempted cast
typeOf() Determines the C# type of the object.
where() Filters an IEnumerable to bring back only those items that match a condition.

Usage

using PanoramicData.NCalcExtensions;

...
var calculation = "lastIndexOf('abcdefg', 'def')";
var nCalcExpression = new ExtendedExpression(calculation);

if (nCalcExpression.HasErrors())
{
	throw new FormatException($"Could not evaluate expression: '{calculation}' due to {nCalcExpression.Error}.");
}

return nCalcExpression.Evaluate();

Namespace safety

Note that we regularly extend this library to add new functions. For those that further extend the functions, it is important to avoid future potential namespace conflicts. For this reason, we guarantee that we will never use the underscore character in any future function name and we recommend that any functions that you add DO include an underscore. For example, if you had a project called "My Project", we suggest that you name your functions as follows:

  • mp_myFunction1()
  • mp_myFunction2()

Contributing

Pull requests are welcome! Please submit your requests for new functions in the form of pull requests.

Function documentation

all()

Purpose

Returns true if all values match the lambda expression, otherwise false.

Parameters
  • list - the original list
  • predicate - (optional) a string to represent the value to be evaluated
  • nCalcString - (optional, but must be provided if predicate is) the string to evaluate
Examples
  • all() : true
  • all(list(false, false, false)) : false
  • all(list(true, false, true)) : false
  • all(list(true, true, true)) : true
  • all(list(1, 2, 3, 4, 5), 'n', 'n < 3') : false
  • all(list(1, 2, 3, 4, 5), 'n', 'n > 0 && n < 10') : true

any()

Purpose

Returns true if any values match the lambda expression, otherwise false.

Parameters
  • list - the original list
  • predicate - (optional) a string to represent the value to be evaluated
  • nCalcString - (optional, but must be provided if predicate is) the string to evaluate
Examples
  • any(list()) : false
  • any(list(1, 2, 3)) : true
  • any(list(1, 2, 3, 4, 5), 'n', 'n < 3') : true
  • any(list(1, 2, 3, 4, 5), 'n', 'n > 11') : false

canEvaluate()

Purpose

Determines whether ALL of the parameters can be evaluated. This can be used, for example, to test whether a parameter is set.

Parameters
  • parameter1, parameter2, ...
Examples
  • canEvaluate(nonExistent) : false
  • canEvaluate(1) : true

capitalize()

Purpose

Capitalizes a string.

Parameters
  • string
Examples
  • capitalize('new year') : 'New Year'

cast()

Purpose

Cast an object to another (e.g. float to decimal).

Notes

The method requires that conversion of value to target type be supported.

Parameters
  • inputObject
  • typeString
Examples
  • cast(0.3, 'System.Decimal')

changeTimeZone()

Purpose

Change a DateTime's time zone.

Notes

For a list of supported TimeZone names, see https://docs.microsoft.com/en-us/dotnet/api/system.timezoneinfo.findsystemtimezonebyid?view=netstandard-2.0

Parameters
  • source DateTime
  • source TimeZone name
  • destination TimeZone name
Examples
  • changeTimeZone(theDateTime, 'UTC', 'Eastern Standard Time')
  • changeTimeZone(theDateTime, 'Eastern Standard Time', 'UTC')

concat()

Purpose

Concatenates lists and objects.

Notes

The examples all result in a List<object?> containing 4 integers: 1, 2, 3 and 4.

Parameters
  • the lists or objects to concatenate
Examples
  • concat(list(1, 2), list(3, 4))
  • concat(list(1, 2, 3, 4))
  • concat(1, 2, 3, 4)
  • concat(list(1, 2, 3), 4)
  • concat(1, list(2, 3, 4))

contains()

Purpose

Determines whether one string contains another.

Parameters
  • string searched-in text
  • string searched-for text
Examples
  • contains('haystack containing needle', 'needle') : true
  • contains('haystack containing only hay', 'needle') : false

convert()

Purpose

Converts the output of parameter 1 into the result of parameter 2.

Notes

Can be used to return an empty string instead of the result of parameter 1, which can be useful when the return value is not useful. The result of parameter 1 is available as the variable "value".

Parameters
  • the value to calculate
  • destination TimeZone name
Examples
  • convert(anyFunction(), 'XYZ'): 'XYZ'
  • convert(1 + 1, value + 1): 3

count()

Purpose

Counts the number of items. Optionally, only count those that match a lambda.

Parameters
  • list - the original list
  • predicate (optional) - a string to represent the value to be evaluated
  • nCalcString (optional) - the string to evaluate
Examples
  • count('a piece of string') : 17
  • count(list(1, 2, 3, 4, 5)) : 5
  • count(list(1, 2, 3, 4, 5), 'n', 'n > 3') : 2

countBy()

Purpose

Counts the number of items, grouped by a calculation.

Parameters
  • list - the original list
  • predicate - a string to represent the value to be evaluated
  • nCalcString - the string to evaluate. Must emit a string containing one or more characters: A-Z, a-z, 0-9 or _.
Examples
  • countBy(list(1, 2, 2, 3, 3, 3, 4), 'n', 'toLower(toString(n > 1))') : { 'false': 1, 'true': 6 }
  • countBy(list(1, 2, 2, 3, 3, 3, 4), 'n', 'toString(n)') : { '1': 1, '2': 2, '3', 3, '4', '1 }

dateAdd()

Purpose

Add a specified period to a DateTime. The following units are supported:

  • Years
  • Months
  • Days
  • Hours
  • Minutes
  • Seconds
  • Milliseconds
Parameters
  • intialDateTime - A DateTime to which to add the period specified
  • quantity - The integer number of the units to be added
  • units - A string representing the units used to specify the period to be added
Examples
  • dateAdd(toDateTime('2019-03-05 05:09', 'yyyy-MM-dd HH:mm'), -90, 'days') : 90 days before (2018-12-05 05:09:00)
  • dateAdd(toDateTime('2019-03-05 01:03:05', 'yyyy-MM-dd HH:mm:ss'), 2, 'hours') : 2 hours later (2019-03-05 03:03:05)

dateTime()

Purpose

Return the DateTime in the specified format as a string, with an optional offset.

Parameters
  • timeZone (only 'UTC' currently supported)
  • format
  • day offset
  • hour offset
  • minute offset
  • second offset
Examples
  • dateTime('UTC', 'yyyy-MM-dd HH:mm:ss', -90, 0, 0, 0) : 90 days ago (e.g. '2019-03-14 05:09')
  • dateTime('UTC', 'yyyy-MM-dd HH:mm:ss') : now (e.g. '2019-03-14 05:09')

dateTimeAsEpoch()

Purpose

Parses the input DateTime and outputs as seconds since the Epoch (1970-01-01T00:00Z).

Parameters
  • input date string
  • format
Examples
  • dateTimeAsEpoch('20190702T000000', 'yyyyMMddTHHmmssK') : 1562025600

dateTimeAsEpochMs()

Purpose

Parses the input DateTime and outputs as milliseconds since the Epoch (1970-01-01T00:00Z).

Parameters
  • input date string
  • format
Examples
  • dateTimeAsEpochMs('20190702T000000', 'yyyyMMddTHHmmssK') : 1562025600000

dictionary()

Purpose

Emits a Dictionary<string, object?>.

Parameters
  • interlaced keys and values. You must provide an even number of parameters, and keys must evaluate to strings.
Examples
  • dictionary('KEY1', 'Hello', 'KEY2', 'Goodbye') : a dictionary containing 2 values with keys KEY1 and KEY2, and string values
  • dictionary('TRUE', true, 'FALSE', false) : a dictionary containing 2 values with keys TRUE and FALSE, and boolean values

distinct()

Purpose

Returns only distinct items from the input.

Parameters
  • list - the original list
Examples
  • distinct(list(1, 2, 3, 3, 3)) : list(1, 2, 3)

endsWith()

Purpose

Determines whether a string ends with another string.

Parameters
  • longString
  • shortString
Examples
  • endsWith('abcdefg', 'fg') : true
  • endsWith('abcdefg', 'fgh') : false

extend()

Purpose

Extends an existing object into a JObject with both the original and additional properties.

Parameters
  • originalObject
  • listOfAdditionalProperties
Examples
  • extend(jObject('a', 1, 'b', null), list('c', 5)) : JObject with a=1, b=null and c=5

first()

Purpose

Returns the first item in a list that matches a lambda or throws a FormatException if no items match.

Parameters
  • list
  • predicate
  • lambda expression as a string
Examples
  • first(list(1, 5, 2, 3), 'n', 'n % 2 == 0') : 2
  • first(list(1, 5, 7, 3), 'n', 'n % 2 == 0') : FormatException thrown

firstOrDefault()

Purpose

Returns the first item in a list that matches a lambda or null if no items match.

Parameters
  • list
  • predicate
  • lambda expression as a string
Examples
  • firstOrDefault(list(1, 5, 2, 3), 'n', 'n % 2 == 0') : 2
  • firstOrDefault(list(1, 5, 7, 3), 'n', 'n % 2 == 0') : null

format()

Purpose

Formats strings and numbers as output strings with the specified format.

Parameters
  • object (number or text)
  • format: the format to use
  • see C# number and date/time formatting
  • weekOfMonth is the numeric week of month as would be shown on a calendar with one row per week with weeks starting on a Sunday
  • weekOfMonthText is the same as weekOfMonth, but translated: 1: 'first', 2: 'second', 3: 'third', 4: 'forth', 5: 'last'
  • weekDayOfMonth is the number of times this weekday has occurred within the month so far, including this one
  • weekDayOfMonthText is the same as weekDayOfMonth, but translated: 1: 'first', 2: 'second', 3: 'third', 4: 'forth', 5: 'last'
Examples
  • format(1, '00') : '01'
  • format(1.0, '00') : '01'
  • format('2021-11-29', 'dayOfYear') : '333'
  • format('2021-11-01', 'weekOfMonth') : 1
  • format('2021-11-01', 'weekOfMonthText') : 'first'
  • format('2021-11-28', 'weekOfMonth') : 5
  • format('2021-11-28', 'weekOfMonthText') : 'last'
  • format('2021-11-28', 'weekDayOfMonth') : 4
  • format('2021-11-28', 'weekDayOfMonthText') : 'forth'
  • format('01/01/2019', 'yyyy-MM-dd') : '2019-01-01'
  • format(theDateTime, 'yyyy-MM-dd HH:mm', 'Eastern Standard Time') [where theDateTime is a .NET DateTime, set to DateTime.Parse("2020-03-13 16:00", CultureInfo.InvariantCulture)] : '2020-03-13 12:00'

getProperties()

Purpose

Gets a list of an object's properties.

Parameters
  • sourceObject
Examples
  • getProperties(parse('jObject', '{ "A": 1, "B": 2 }')) : [ 'A', 'B' ]
  • getProperties(toDateTime('2019-01-01', 'yyyy-MM-dd')) : [ 'Date', 'Day', 'DayOfWeek', 'DayOfYear', 'Hour', 'Kind', 'Millisecond', 'Microsecond', 'Nanosecond', 'Minute', 'Month', 'Now', 'Second', 'Ticks', 'TimeOfDay', 'Today', 'Year', 'UtcNow' ]

getProperty()

Purpose

Gets an object's property.

Parameters
  • sourceObject
  • propertyName
Examples
  • getProperty(toDateTime('2019-01-01', 'yyyy-MM-dd'), 'Year') : 2019 (int)

humanize()

Purpose

Humanizes the value text.

Parameters
  • value
  • timeUnit
Examples
  • humanize(3600, 'seconds') : '1 hour'

if()

Purpose

Return one of two values, depending on the input function.

Parameters
  • condition
  • output if true
  • output if false
Examples
  • if(1 == 1, 'yes', 'no') : 'yes'
  • if(1 == 2, 3, 4) : 4

in()

Purpose

Determines whether a value is in a set of other values.

Parameters
  • list
  • item
Examples
  • in('needle', 'haystack', 'with', 'a', 'needle', 'in', 'it') : true
  • in('needle', 'haystack', 'with', 'only', 'hay') : false

indexOf()

Purpose

Determines the first position of a string within another string.

Notes

The first character is position 0. Returns -1 if not present.

Parameters
  • longString
  • shortString
Examples
  • indexOf('#abcabc#', 'abc') : 1
  • indexOf('#abcabc#', 'abcd') : -1

isGuid()

Purpose

Determines whether a value is a GUID, or is a string that can be converted to a GUID.

Parameters
  • value
Examples
  • isGuid('9384EF0Z-38AD-4E8E-A24E-0ACD3273A401') : true
  • isGuid('{9384EF0Z-38AD-4E8E-A24E-0ACD3273A401}') : true
  • isGuid('abc') : false

isInfinite()

Purpose

Determines whether a value is infinite.

Parameters
  • value
Examples
  • isInfinite(1/0) : true
  • isInfinite(0/1) : false

isNaN()

Purpose

Determines whether a value is not a number.

Parameters
  • value
Examples
  • isNaN(null) : true
  • isNaN('abc') : true
  • isNaN(1) : false

isNull()

Purpose

Determines whether a value is null.

Notes

Returns true if the value is:

  • null; or
  • it's a JObject and it's type is JTokenType.Null.
Parameters
  • value
Examples
  • isNull(1) : false
  • isNull('text') : false
  • isNull(bob) : true if bob is null
  • isNull(null) : true

isNullOrEmpty()

Purpose

Determines whether a value is null or empty.

Notes

True if:

  • null; or
  • it's a JObject and it's type is JTokenType.Null or;
  • it's a string and it's empty.
Parameters
  • value
Examples
  • isNullOrEmpty(null) : true
  • isNullOrEmpty('') : true
  • isNullOrEmpty(' ') : false
  • isNullOrEmpty(bob) : true if bob is null or whitespace
  • isNullOrEmpty(1) : false
  • isNullOrEmpty('text') : false

isNullOrWhiteSpace()

Purpose

Determines whether a value is null, empty or whitespace.

Notes

Returns true is the value is:

  • null; or
  • it's a JObject and it's type is JTokenType.Null or;
  • it's a string and it's empty or only contains whitespace characters (\r, \n, \t, or ' ').
Parameters
  • value
Examples
  • isNullOrWhiteSpace(null) : true
  • isNullOrWhiteSpace('') : true
  • isNullOrWhiteSpace(' ') : true
  • isNullOrWhiteSpace(bob) : true if bob is null or whitespace
  • isNullOrWhiteSpace(1) : false
  • isNullOrWhiteSpace('text') : false

isSet()

Purpose

Determines whether a parameter is set.

Parameters
  • parameter name
Examples
  • isSet('a') : true/false depending on whether a is an available variable

itemAtIndex()

Purpose

Determines the item at the given index. The first index is 0.

Parameters
  • parameter name
Examples
  • itemAtIndex(split('a b c', ' '), 1) : 'b'

jArray()

Purpose

Creates a Newtonsoft JArray from input values.

Parameters
  • items[]
Examples
  • jArray(jObject('a', 1, 'b', null), jObject('a', 2, 'b', #2024-06-21#)) : JArray [ { "a": 1, "b": null}, { "a": 2, "b": "2024-06-21T00:00:00"} ]
  • jArray(1, null, 'woo') : JArray [ 1, null, "woo" ]

jObject()

Purpose

Creates a JObject from key/value pairs.

Parameters
  • key1 (string)
  • value1
  • key2 (string)
  • value2
  • ...
  • keyN
  • valueN
Examples
  • jObject('a', 1, 'b', null) : JObject{ "a": 1, "b": null}

join()

Purpose

Joins a list of strings into a single string.

Parameters
  • parameter name
Examples
  • join(split('a b c', ' '), ', ') : 'a, b, c'

jPath()

Purpose

Selects a single value from a JObject using a JPath expression

Parameters
  • input JObject
  • JPath string expression
Examples

sourceJObject JSON:

{
"name": "bob",
"details": {
   "this.thing": "woo",
   "that.thing": "yay",
},
"numbers": [ 1, 2 ],
"arrayList": [ 
	{ "key": "key1", "value": "value1" },
	{ "key": "key2", "value": "value2" } 
]
}
  • jPath(sourceJObject, 'name') : 'bob'
  • jPath(sourceJObject, 'details.['this.thing']') : 'woo'
  • jPath(sourceJObject, 'size') : an exception is thrown
  • jPath(sourceJObject, 'size', True) : null is returned
  • jPath(sourceJObject, 'numbers[0]') : 1
  • jPath(sourceJObject, 'arrayList[?(@key==\'key1\')]') : "value1"

Purpose

Returns the last item in a list that matches a lambda or throws a FormatException if no items match. Note that items are processed in reverse order.

Parameters
  • list
  • predicate
  • lambda expression as a string
Examples
  • first(list(1, 5, 2, 3, 4, 1), 'n', 'n % 2 == 0') : 4
  • first(list(1, 5, 7, 3), 'n', 'n % 2 == 0') : FormatException thrown

lastIndexOf()

Purpose

Determines the last position of a string within another string. Returns -1 if not present.

Parameters
  • longString
  • shortString
Examples
  • lastIndexOf('#abcabc#', 'abc') : 4
  • lastIndexOf('#abcabc#', 'abcd') : -1

lastOrDefault()

Purpose

Returns the last item in a list that matches a lambda or null if no items match. Note that items are processed in reverse order.

Parameters
  • list
  • predicate
  • lambda expression as a string
Examples
  • lastOrDefault(list(1, 5, 2, 3, 4, 1), 'n', 'n % 2 == 0') : 4
  • lastOrDefault(list(1, 5, 7, 3), 'n', 'n % 2 == 0') : null

length()

Purpose

Determines length of a string or IList.

Parameters
  • string or IList
Examples
  • length('a piece of string') : 17
  • length(split('a piece of string', ' ')) : 4

list()

Purpose

Emits a List<object?> and collapses down lists of lists to a single list.

Parameters
  • the parameters
Examples
  • list('', 1, '0')
  • list(null, 1, '0')
  • list(list(null, 1, '0'), 1, '0')

listOf()

Purpose

Emits a List<T>.

Parameters
  • the type
  • the parameters
Examples
  • listOf('object?', '', 1, '0')
  • listOf('object?', null, 1, '0')
  • listOf('int?', 1, null, 3)
  • listOf('string', '1', '2', 3) : throws an exception

max()

Purpose

Emits the maximum value, ignoring nulls.

Parameters
  • the list
  • optionally, a pair of parameters providing a lambda expression to be evaluated.
Examples
  • max(listOf('int?', 1, null, 3)) : 3
  • max(listOf('int', 1, 2, 3), 'x', 'x + 1') : 4
  • max(listOf('string', '1', '2', '3')) : '3'
  • max(listOf('string', '1', '2', '3'), 'x', 'x + x') : '33'

maxValue()

Purpose

Emits the maximum possible value for a given numeric type.

Parameters
  • a string representing the type, which must be one of 'sbyte', 'byte', 'short', 'ushort', 'int', 'uint', 'long', 'ulong', 'float', 'double' or 'decimal'.
Examples
  • maxValue('byte') : (byte)255
  • maxValue('ushort') : (ushort)65535

min()

Purpose

Emits the minimum value, ignoring nulls.

Parameters
  • the list
  • optionally, a pair of parameters providing a lambda expression to be evaluated.
Examples
  • min(listOf('int?', 1, null, 3)) : 1
  • min(listOf('int', 1, 2, 3), 'x', 'x + 1') : 2
  • min(listOf('string', '1', '2', '3')) : '1'
  • min(listOf('string', '1', '2', '3'), 'x', 'x + x') : '11'

minValue()

Purpose

Emits the minimum possible value for a given numeric type.

Parameters
  • a string representing the type, which must be one of 'sbyte', 'byte', 'short', 'ushort', 'int', 'uint', 'long', 'ulong', 'float', 'double' or 'decimal'.
Examples
  • minValue('byte') : (byte)0
  • minValue('ushort') : (ushort)0

nullCoalesce()

Purpose

Returns the first parameter that is not null, otherwise: null.

Parameters
  • any number of objects
Examples
  • nullCoalesce() : null
  • nullCoalesce(1, null) : 1
  • nullCoalesce(null, 1, 2, 3) : 1
  • nullCoalesce(null, null, null) : null
  • nullCoalesce(null, null, 'xxx', 3) : 'xxx'

orderBy()

Purpose

Orders an IEnumerable by one or more lambda expressions.

Parameters
  • list - the original list
  • predicate - a string to represent the value to be evaluated
  • nCalcString1 - the first orderBy lambda expression
  • nCalcString2 (optional) - the next orderBy lambda expression
  • nCalcString... (optional) - the next orderBy lambda expression
Examples
  • orderBy(list(34, 33, 2, 1), 'n', 'n') : list(1, 2, 33, 34)
  • orderBy(list(34, 33, 2, 1), 'n', '-n') : list(34, 33, 2, 1)
  • orderBy(list(34, 33, 2, 1), 'n % 32', 'n % 2') : list(34, 33, 1, 2)
  • orderBy(list(34, 33, 2, 1), 'n % 2', 'n % 32') : list(33, 1, 34, 2)

padLeft()

Purpose

Pad the left of a string with a character to a desired string length.

Parameters
  • stringToPad
  • desiredStringLength (must be >=1)
  • paddingCharacter
Examples
  • padLeft('', 1, '0') : '0'
  • padLeft('12', 5, '0') : '00012'
  • padLeft('12345', 5, '0') : '12345'
  • padLeft('12345', 3, '0') : '12345'

parse()

Purpose

Returns the conversion of a string to a numeric type. Supported types are:

  • bool or System.Boolean
  • sbyte or System.SByte
  • byte or System.Byte
  • short or System.Int16
  • ushort or System.UInt16
  • int or System.Int32
  • uint or System.UInt32
  • long or System.Int64
  • ulong or System.UInt64
  • double or System.Double
  • float or System.Single
  • decimal or System.Decimal
  • JArray or Newtonsoft.Json.Linq.JArray (jArray also supported for backaward compatibility)
  • JObject or Newtonsoft.Json.Linq.JObject (jObject also supported for backaward compatibility)
  • Guid
Parameters
  • type (see above)
  • text
  • valueIfParseFails (optional)
Examples
  • parse('int', '1') : 1
  • parse('System.Int32', '1') : 1
  • parse('bool', 'x', null) : null
  • parse('jObject', '{ "a" : 1 }', null) : JObject { "a": 1 }
  • parse('jArray', '[ { "a" : 1 } ]', null) : JArray [{ "a": 1 }]

parseInt()

Purpose

Returns an integer version of a string.

Parameters
  • integerAsString
Examples
  • parseInt('1') : 1

regexGroup()

Purpose

Selects a regex group capture

Parameters
  • input
  • regex
  • zero-based capture index (default: 0)
Examples
  • regexGroup('abcdef', '^ab(.+?)f$') : 'cde'
  • regexGroup('abcdef', '^ab(.)+f$') : 'c'
  • regexGroup('abcdef', '^ab(.)+f$', 1) : 'd'
  • regexGroup('abcdef', '^ab(.)+f$', 2) : 'e'
  • regexGroup('abcdef', '^ab(.)+f$', 10) : null

regexIsMatch()

Purpose

Determine whether a string matches a regex

Parameters
  • input
  • regex
Examples
  • regexIsMatch('abcdef', '^ab.+') : true
  • regexIsMatch('Zbcdef', '^ab.+') : false

replace()

Purpose

Replace a string with another string

Parameters
  • haystackString
  • needleString
  • betterNeedleString
Examples
  • replace('abcdefg', 'cde', 'CDE') : 'abCDEfg'
  • replace('abcdefg', 'cde', '') : 'abfg'

retrieve()

Purpose

Retrieves a value from storage

Parameters
  • key
Examples
  • retrieve('thing')

reverse()

Purpose

Reverses an IEnumerable.

Parameters
  • list
Examples
  • reverse(list(1, 2, 3, 4, 5, 5) : 5, 5, 4, 3, 2, 1

sanitize()

Purpose

Sanitize a string, replacing any characters outside of the allowed set.

Parameters
  • input - the string to be sanitized
  • allowedCharacters - all of the characters that are allowed
  • replacementCharacters (optional) - the characters to insert in place of any that are not allowed (defaults : empty string)
Examples
  • sanitize('ab cd', 'abcdefghi') : 'abcd'
  • sanitize('ab cd./', 'abcdefghi.') : 'abcd.'
  • sanitize('ab cd./', 'CBa') : 'a'
  • sanitize('ab cd', 'abCD', '?') : 'ab???'
  • sanitize('ab cd', 'ab', '?') : 'ab???'
  • sanitize('ab cd', 'ab', '-') : 'ab---'

select()

Purpose

Converts an IEnumerable using a lambda.

Parameters
  • list - the original list
  • predicate - a string to represent the value to be evaluated
  • nCalcString - the value to evaluate to for each item in the list
  • output list type - outputs a list of the specified type (optional)
Examples
  • select(list(1, 2, 3, 4, 5), 'n', 'n + 1') : list(2, 3, 4, 5, 6)
  • select(list(jObject('a', 1, 'b', '2'), jObject('a', 3, 'b', '4')), 'n', 'n', 'JObject') : list of JObjects

selectDistinct()

Purpose

Converts an IEnumerable using a lambda and removes duplicates.

Parameters
  • list - the original list
  • predicate - a string to represent the value to be evaluated
  • nCalcString - the value to evaluate to for each item in the list
Examples
  • selectDistinct(list(1, 2, 3, 3, 3), 'n', 'n + 1') : list(2, 3, 4)

setProperties()

Purpose

Sets properties on an existing object.

Parameters
  • object - the original object
  • property1 - the first new property name
  • value1 - the first new property value
  • propertyN (optional) - the nth new property name
  • valueN (optional) - the nth new property value
Examples
  • setProperties(jObject('a', 1, 'b', null), 'c', 'X') : jObject('a', 1, 'b', null, 'c', 'X')
  • setProperties(jObject('a', 1, 'b', null), 'c', 'X', 'd', 'Y') : jObject('a', 1, 'b', null, 'c', 'X', 'd', 'Y')

skip()

Purpose

Skips a number of items in a list.

Notes

If the number of items to skip is greater than the number of items in the list, an empty list is returned.

Parameters
  • the list to skip from
  • the number of items to skip
Examples
  • skip(list(1, 2, 3), 1): list(2, 3)

sort()

Purpose

Sorts an IComparable ascending or descending.

Parameters
  • list - the original list
  • direction (optional) - 'asc' is the default, 'desc' is the other option
Examples
  • sort(list(2, 1, 3)) : list(1, 2, 3)
  • sort(list(2, 1, 3), 'asc') : list(1, 2, 3)
  • sort(list(2, 1, 3), 'desc') : list(3, 2, 1)
  • sort(list('b', 'a', 'c'))) : list('a', 'b', 'c')

split()

Purpose

Splits a string on a given character into a list of strings.

Parameters
  • longString
  • string to split on
Examples
  • split('a bc d', ' ') : list('a', 'bc', 'd')
  • split('aXXbcXXd', 'XX') : list('a', 'bc', 'd')

startsWith()

Purpose

Determines whether a string starts with another string.

Parameters
  • longString
  • shortString
Examples
  • startsWith('abcdefg', 'ab') : true
  • startsWith('abcdefg', 'cd') : false

store()

Purpose

Stores a value for use later in the pipeline

Returns

true

Parameters
  • key
  • value
Examples
  • store('thing', 1) : true

substring()

Purpose

Retrieves part of a string. If more characters are requested than available at the end of the string, just the available characters are returned.

Parameters
  • inputString
  • startIndex
  • length (optional)
Examples
  • substring('haystack', 3) : 'stack'
  • substring('haystack', 0, 3) : 'hay'
  • substring('haystack', 3, 100) : 'stack'
  • substring('haystack', 0, 100) : 'haystack'
  • substring('haystack', 0, 0) : ''

sum()

Purpose

Sums numeric items. Optionally, perform a lambda on each one first.

Parameters
  • list - the original list
  • predicate (optional) - a string to represent the value to be evaluated
  • nCalcString (optional) - the string to evaluate
Examples
  • sum(list(1, 2, 3)) : 6
  • sum(list(1, 2, 3), 'n', 'n * n') : 14

switch()

Purpose

Return one of a number of values, depending on the input function.

Parameters
  • switched value
  • a set of pairs: case_n, output_n
  • if present, a final value can be used as a default. If the default WOULD have been returned, but no default is present, an exception is thrown.
Examples
  • switch('yes', 'yes', 1, 'no', 2) : 1
  • switch('blah', 'yes', 1, 'no', 2) : throws exception
  • switch('blah', 'yes', 1, 'no', 2, 3) : 3

take()

Purpose

Takes a number of items from a list.

Notes

If a number is provided that is longer than the list, the full list is returned.

Parameters
  • the list to take from
  • the number of items to take
Examples
  • take(list(1, 2, 3), 2): list(1, 2)
  • take(list(1, 2, 3), 10): list(1, 2, 3)

throw()

Purpose

Throws an NCalcExtensionsException. Useful in an if().

Parameters
  • message (optional)
Examples
  • throw()
  • throw('This is a message')
  • if(problem, throw('There is a problem'), 5)

timeSpan()

Purpose

Determines the amount of time between two DateTimes. The following units are supported:

Parameters
  • startDateTime
  • endDateTime
  • timeUnit
Examples
  • timeSpan('2019-01-01 00:01:00', '2019-01-01 00:02:00', 'seconds') : 3600

toDateTime()

Purpose

Converts a string to a UTC DateTime. May take an optional inputTimeZone.

Notes

When using numbers as the first input parameter, provide it as a decimal (see examples, below) to avoid hitting an NCalc bug relating to longs being interpreted as floats.

Parameters
Examples
  • toDateTime('2019-01-01', 'yyyy-MM-dd') : A date time representing 2019-01-01
  • toDateTime('2020-02-29 12:00', 'yyyy-MM-dd HH:mm', 'Eastern Standard Time') : A date time representing 2020-02-29 17:00:00 UTC
  • toDateTime('2020-03-13 12:00', 'yyyy-MM-dd HH:mm', 'Eastern Standard Time') : A date time representing 2020-03-13 16:00:00 UTC
  • toDateTime(161827200.0, 's', 'UTC') : A date time representing 1975-02-17 00:00:00 UTC
  • toDateTime(156816000000.0, 'ms', 'UTC') : A date time representing 1974-12-21 00:00:00 UTC
  • toDateTime(156816000000000.0, 'us', 'UTC') : A date time representing 1974-12-21 00:00:00 UTC

toLower()

Purpose

Converts a string to lower case.

Parameters
  • string
Examples
  • toLower('PaNToMIMe') : 'pantomime'

toString()

Purpose

Converts any object to a string

Parameters
  • object
  • format (optional)
Examples
  • toString(1) : '1'
  • toString(1000, 'N2') : '1,000.00'
  • toString(DateTimeOffset, 'yyyy-MM-dd') : '2023-02-17'

toUpper()

Purpose

Converts a string to upper case.

Parameters
  • string
Examples
  • toUpper('PaNToMIMe') : 'PANTOMIME'

try()

Purpose

If a function throws an exception, return an alternate value.

Parameters
  • function to attempt
  • result to return if an exception is thrown (null is returned if this parameter is omitted and an exception is thrown)
Examples
  • try(1, 'Failed') : 1
  • try(throw('Woo')) : null
  • try(throw('Woo'), 'Failed') : 'Failed'
  • try(throw('Woo'), exception_message) : 'Woo'
  • try(throw('Woo'), exception_type) : typeof(PanoramicData.NCalcExtensions.Exceptions.NCalcExtensionsException)
  • try(throw('Woo'), exception_typeFullName) : 'PanoramicData.NCalcExtensions.Exceptions.NCalcExtensionsException'
  • try(throw('Woo'), exception_typeName) : 'NCalcExtensionsException'
  • try(throw('Woo'), exception) : The Exception object thrown by the throw function.

tryParse()

Purpose

Returns a boolean result of an attempted cast.

Parameters
  • type
  • value
  • key - for use with the retrieve() function
Examples
  • tryParse('int', '1', 'outputVariable') : true
  • tryParse('int', 'string', 'outputVariable') : false

typeOf()

Purpose

Determines the C# type of the object.

Parameters
  • parameter
Examples
  • typeOf('text') : 'String'
  • typeOf(1) : 'Int32'
  • typeOf(1.1) : 'Double'
  • typeOf(null) : null

where()

Purpose

Filters an IEnumerable to bring back only those items that match a condition.

Parameters
  • list - the original list
  • predicate - a string to represent the value to be evaluated
  • nCalcString - the string to evaluate
Examples
  • where(list(1, 2, 3, 4, 5), 'n', 'n < 3') : list(1, 2)
  • where(list(1, 2, 3, 4, 5), 'n', 'n < 3 || n > 4') : list(1, 2, 5)
Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

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Fixes to min() and max().  Added jArray().