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EqualityTypeComparison.md

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EqualityTypeComparison

Synopsis

Allows equality type comparison.

Description

Allows most equality comparison using triple equals (===).

Many languages support this syntax. PowerShell does not.

This transpiler enables equality and type comparison with ===.

Examples

EXAMPLE 1

Invoke-PipeScript -ScriptBlock {
    $a = 1
    $number = 1    
    if ($a === $number ) {
        "A is $a"
    }
}

EXAMPLE 2

Invoke-PipeScript -ScriptBlock {
    $One = 1
    $OneIsNotANumber = "1"
    if ($one == $OneIsNotANumber) {
        'With ==, a number can be compared to a string, so $a == "1"'
    }
    if (-not ($One === $OneIsNotANumber)) {
        "With ===, a number isn't the same type as a string, so this will be false."            
    }
}

EXAMPLE 3

Invoke-PipeScript -ScriptBlock {
    if ($null === $null) {
        '$Null really is $null'
    }
}

EXAMPLE 4

Invoke-PipeScript -ScriptBlock {
    $zero = 0
    if (-not ($zero === $null)) {
        '$zero is not $null'
    }
}

EXAMPLE 5

{
    $a = "b"
    $a === "b"
} | .>PipeScript

Parameters

AssignmentStatementAST

The original assignment statement.

Type Required Position PipelineInput
[AssignmentStatementAst] true 1 true (ByValue)

Notes

This will not work if there is a constant on both sides of the expression

if ($one === $one) { "this will work"} if ('' === '') { "this will not"}

Syntax

EqualityTypeComparison [-AssignmentStatementAST] <AssignmentStatementAst> [<CommonParameters>]