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PHP Ds / Sequence apply () function

Syntax:
void abstract public DsSequence::apply (callable $callback)
Parameter:this function takes one parameter, $callback,which is used to apply to each value in the sequence.Return value:This function does not return no parameters.The following programs illustrate the Ds / Sequence::apply()function in PHP:Program 1:  
// Create a new sequence $seq = new DsVector ([10, 20, 30, 40, 50]);  
// Use the apply() function $seq -> apply ( function ( $val ) { return $val / 5;});  
// Show result print_r ( $seq );  
?>
Exit:
DsVector Object ( [0] = > 2 [1] = > 4 [2] = > 6 [3] = > 8 [4] = > 10)
Program 2:  
// Create a new sequence $seq = new DsVector ([2, 3, 5, 6, 8]);  
// Use the apply() function $seq -> apply ( function ( $val ) { return $val ; });  
// Show result var_dump ( $seq );  
?>
Exit:
object (DsVector ) # 1 (5) {[0] = > int (2) [1] = > int (3) [2] = > int (5) [3] = > int (6) [4] = > int (8)}
Link: https: / /www.php.net/manual/en/ds-sequence.apply.php

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