nspl\op
Ihor Burlachenko edited this page May 19, 2016
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Class nspl\op provides functions that perform standard PHP operations and can be passed as callbacks to higher-order functions. Mimics Python's operator module. For example:
use const nspl\op\sum;
use function nspl\a\reduce;
assert(6 === reduce(sum, [1, 2, 3]));The module provides the following operations both as functions and callbacks. See an example below.
| Function | Operation |
|---|---|
| sum | + |
| sub | - |
| mul | * |
| div | / |
| mod | % |
| inc | ++ |
| dec | -- |
| neg | - |
| band | & |
| bxor | ^ |
| bor | | |
| bnot | ~ |
| lshift | << |
| rshift | >> |
| lt | < |
| le | <= |
| eq | == |
| idnt | === |
| ne | != |
| nidnt | !== |
| ge | > |
| gt | >= |
| and_ | && |
| or_ | || |
| xor_ | xor |
| not | ! |
| concat | . |
| int | (int) |
| bool | (bool) |
| float | (float) |
| str | (string) |
| array_ | (array) |
| object | (object) |
Returns a function that returns key value for a given array
use function nspl\op\itemGetter;
use function nspl\a\map;
assert([2, 5, 8] === map(itemGetter(1), [[1, 2, 3], [4, 5, 6], [7, 8, 9]]));Returns a function that returns property value for a given object
$userIds = map(propertyGetter('id'), $users);Returns a function that returns method result for a given object on predefined arguments
$userIds = map(methodCaller('getId'), $users);Check more \nspl\op examples here.