PHP · Theory

array_map()

Theory

139/352

array_map()

If you can teach array_map() (function) using array_map function on Priya's board, you know it. If you only know the heading, you don’t.

Keep array_map() (function) small. Priya should finish array_map function on Priya's board in a few lines, not a 40-line dump.

Without array_map() (function), lab hour gets messy and array_map function on Priya's board is hard to trust.

array_map() (function) shows up in lab hour. Name array_map function on Priya's board, not “a real-world scenario”.

array_map() (function) miss — only reciting the name of array_map function. Fix it before you talk about advanced PHP.

After array_map() (function), Priya should still remember only reciting the name of array_map function.

One breath for array_map() (function), then array_map function on Priya's board, then only reciting the name of array_map function. Sit down.

Exam tip

For array_map() (function): definition + lab hour + one failure.

Example

<?php
// array_map()
$scores = [80, 90, 70];
$avg = array_sum($scores) / count($scores);
echo "avg=" . number_format($avg, 1) . "\n";
foreach ($scores as $s) {
  if ($s >= 80) echo "high: $s\n";
}

array_map(): scores array, print avg, then high marks. Say the output.

Short notes

Defarray_map() (function) — Priya uses it for array_map function on Priya's board in lab hour.
Rulearray_map() (function) → one array_map function step Priya can write from memory.
Rememberarray_map() (function) + a .php page (lab hour).
Usearray_map() (function) in lab hour (array_map function on Priya's board).
Traparray_map() (function) — only reciting the name of array_map function.
Exarray_map() (function) → array_map function on Priya's board.

PHP · Theory

array_map()

← All stacks

Theory

139/352

array_map()

If you can teach array_map() (function) using array_map function on Priya's board, you know it. If you only know the heading, you don’t.

Keep array_map() (function) small. Priya should finish array_map function on Priya's board in a few lines, not a 40-line dump.

Without array_map() (function), lab hour gets messy and array_map function on Priya's board is hard to trust.

array_map() (function) shows up in lab hour. Name array_map function on Priya's board, not “a real-world scenario”.

array_map() (function) miss — only reciting the name of array_map function. Fix it before you talk about advanced PHP.

After array_map() (function), Priya should still remember only reciting the name of array_map function.

One breath for array_map() (function), then array_map function on Priya's board, then only reciting the name of array_map function. Sit down.

Exam tip

For array_map() (function): definition + lab hour + one failure.

Example

<?php
// array_map()
$scores = [80, 90, 70];
$avg = array_sum($scores) / count($scores);
echo "avg=" . number_format($avg, 1) . "\n";
foreach ($scores as $s) {
  if ($s >= 80) echo "high: $s\n";
}

array_map(): scores array, print avg, then high marks. Say the output.

Short notes

Defarray_map() (function) — Priya uses it for array_map function on Priya's board in lab hour.
Rulearray_map() (function) → one array_map function step Priya can write from memory.
Rememberarray_map() (function) + a .php page (lab hour).
Usearray_map() (function) in lab hour (array_map function on Priya's board).
Traparray_map() (function) — only reciting the name of array_map function.
Exarray_map() (function) → array_map function on Priya's board.

array_map()

Example

Short notes

Questions

array_map()

Example

Short notes

Questions