PHP · Theory

array_reverse()

Theory

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array_reverse()

If you can teach array_reverse() (function) using a array_reverse function dry-run, you know it. If you only know the heading, you don’t.

Do array_reverse() (function) once by hand. one array_reverse function step Amit can write from memory. Change one input. Say the new result out loud.

Without array_reverse() (function), a first job task gets messy and a array_reverse function dry-run is hard to trust.

array_reverse() (function) shows up in a first job task. Name a array_reverse function dry-run, not “a real-world scenario”.

Don’t do this with array_reverse() (function): copy-pasting array_reverse function without a dry-run. Interviewers spot it in ten seconds.

Place array_reverse() (function) next to nearby PHP work — one array_reverse function step Amit can write from memory is the link.

Close array_reverse() (function) with: “If I skip it, a array_reverse function dry-run goes wrong like this: copy-pasting array_reverse function without a dry-run.”

Exam tip

Say array_reverse() (function) in one breath, then one array_reverse function step Amit can write from memory, then copy-pasting array_reverse function without a dry-run.

Example

<?php
// array_reverse()
$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_reverse(): scores array, print avg, then high marks. Say the output.

Short notes

Defarray_reverse() (function) — Amit uses it for a array_reverse function dry-run in a first job task.
Rulearray_reverse() (function) → one array_reverse function step Amit can write from memory.
Rememberarray_reverse() (function) + a .php page (a first job task).
Usearray_reverse() (function) in a first job task (a array_reverse function dry-run).
Traparray_reverse() (function) — copy-pasting array_reverse function without a dry-run.
Exarray_reverse() (function) → a array_reverse function dry-run.

<?php // array_reverse() $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_reverse()

Example

Short notes

Questions

array_reverse()

Example

Short notes

Questions