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Documented support for is in, added support for is not in. (#955)

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* Documented support for `is in`, added support for `is not in`.
Fixes #937
* minor docs improvement
This commit is contained in:
Simon Wisselink
2024-03-25 13:54:02 +01:00
committed by GitHub
parent 58348c38ef
commit 1da30e76e8
9 changed files with 944 additions and 900 deletions
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24
docs/designers/language-basic-syntax/language-syntax-operators.md
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@@ -27,6 +27,30 @@ Various basic operators can be applied directly to variable values.
> complex, it may be a good idea to move the bits that do not deal
> explicitly with presentation to PHP by way of plugins or modifiers.
## List
The following is a list of recognized operators, which must be
separated from surrounding elements by spaces. Note that items listed in
\[brackets\] are optional. PHP equivalents are shown where applicable.
| Operator | Alternates | Syntax Example | Meaning | PHP Equivalent |
|--------------------|------------|----------------------|--------------------------------|--------------------|
| == | eq | $a eq $b | equals | == |
| != | ne, neq | $a neq $b | not equals | != |
| > | gt | $a gt $b | greater than | > |
| < | lt | $a lt $b | less than | < |
| >= | gte, ge | $a ge $b | greater than or equal | >= |
| <= | lte, le | $a le $b | less than or equal | <= |
| === | | $a === 0 | check for identity | === |
| ! | not | not $a | negation (unary) | ! |
| % | mod | $a mod $b | modulo | % |
| is \[not\] div by | | $a is not div by 4 | divisible by | $a % $b == 0 |
| is \[not\] even | | $a is not even | \[not\] an even number (unary) | $a % 2 == 0 |
| is \[not\] even by | | $a is not even by $b | grouping level \[not\] even | ($a / $b) % 2 == 0 |
| is \[not\] odd | | $a is not odd | \[not\] an odd number (unary) | $a % 2 != 0 |
| is \[not\] odd by | | $a is not odd by $b | \[not\] an odd grouping | ($a / $b) % 2 != 0 |
| is in | | $a is in $b | exists in array | in_array($a, $b) |
| is \[not\] in | | $a is not in $b | does not exist in array | !in_array($a, $b) |
## Ternary
You can use the `?:` (or ternary) operator to test one expression and present the value
of the second or third expression, based on the result of the test.