Logic Functions

and - Logic AND

Evaluate logic AND of the arguments. Must have at least two arguments. If more than two arguments are given, all are ANDed.

import ison

dicData = {
    "__locals__": {
        "lA": [True, False, True]
    },

    "result": "$and{*$lA}"
}

dicResult = ison.run.Run(xData=dicData)
print(ison.run.ToString(dicResult))

{
    "result": false
}

eq - Equal

Test for equality of all arguments.

import ison

dicData = {
    "__locals__": {
        "lA": [1, 1.0, 1, 1]
    },

    "result a==a": "$eq{a, a}",
    "result a==b": "$eq{a, b}",
    "result list": "$eq{*$lA}"
}

dicResult = ison.run.Run(xData=dicData)
print(ison.run.ToString(dicResult))

{
    "result a==a": true,
    "result a==b": false,
    "result list": true
}

if - Conditional Parsing

$if{[condition], [true clause], [false clause]}

If the result of the parsing of the condition is true, the second argument is parsed and the result is returned. Otherwise, the second argument is parsed. Note that the true and false clauses are only parsed, after the appropriate condition has been evaluated. The respectively other argument is not parsed at all.

import ison

dicData = {
   
    # Since the condition is true, only the second argument is parsed,
    # and therefore only 'Hello' is printed.
    "result 1": "$if{true, $print{Hello}, $print{World}}",
    "result 2": "$if{false, $print{To}, $print{Day}}"
}

dicResult = ison.run.Run(xData=dicData)
print(ison.run.ToString(dicResult))

Hello
Day
{
    "result 1": "Hello",
    "result 2": "Day"
}

not - Logic NOT

Evaluate logic NOT of the argument. Must have exactly 1 argument.

import ison

dicData = {
    "__locals__": {
        "iA": 0, "fA": 0.0, "bA": False
    },
    
    "result": {"iB": "$not{$iA}", "fB": "$not{$fA}", "bB": "$not{$bA}"},
}

dicResult = ison.run.Run(xData=dicData)
print(ison.run.ToString(dicResult))

{
    "result": {
        "iB": true,
        "fB": true,
        "bB": true
    }
}

or - Logic OR

Evaluate logic OR of the arguments. Must have at least two arguments. If more than two arguments are given, all are ORed.

import ison

dicData = {
    "__locals__": {
        "lA": [True, False, True]
    },

    "result": "$or{*$lA}"
}

dicResult = ison.run.Run(xData=dicData)
print(ison.run.ToString(dicResult))

{
    "result": true
}