PHP · Theory

abs()

Theory

305/352

abs()

abs() is simple if you keep it on paper. Sara uses it for Sara walking through abs in a campus project.

abs() on the board — one abs step Sara can write from memory. Then say what Sara walking through abs looks like after.

Skip abs() and only reciting the name of abs shows up in a campus project.

Use abs() when Sara walking through abs must stay clear. If a simpler PHP step works, use that instead.

Don’t do this with abs() — only reciting the name of abs. Interviewers spot it in ten seconds.

Place abs() next to nearby PHP work — one abs step Sara can write from memory is the link.

Viva for abs() — what it is → one abs step Sara can write from memory → the mistake (only reciting the name of abs).

Exam tip

Board: Sara walking through abs. Dry-run abs(). Name the trap: only reciting the name of abs.

Example

<?php
// abs()
$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";
}

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

Short notes

Defabs() — Sara uses it for Sara walking through abs in a campus project.
Ruleabs() → one abs step Sara can write from memory.
Rememberabs() + Apache/Nginx (a campus project).
Useabs() in a campus project (Sara walking through abs).
Trapabs() — only reciting the name of abs.
Exabs() → Sara walking through abs.

PHP · Theory

abs()

← All stacks

Theory

305/352

abs()

abs() is simple if you keep it on paper. Sara uses it for Sara walking through abs in a campus project.

abs() on the board — one abs step Sara can write from memory. Then say what Sara walking through abs looks like after.

Skip abs() and only reciting the name of abs shows up in a campus project.

Use abs() when Sara walking through abs must stay clear. If a simpler PHP step works, use that instead.

Don’t do this with abs() — only reciting the name of abs. Interviewers spot it in ten seconds.

Place abs() next to nearby PHP work — one abs step Sara can write from memory is the link.

Viva for abs() — what it is → one abs step Sara can write from memory → the mistake (only reciting the name of abs).

Exam tip

Board: Sara walking through abs. Dry-run abs(). Name the trap: only reciting the name of abs.

Example

<?php
// abs()
$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";
}

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

Short notes

Defabs() — Sara uses it for Sara walking through abs in a campus project.
Ruleabs() → one abs step Sara can write from memory.
Rememberabs() + Apache/Nginx (a campus project).
Useabs() in a campus project (Sara walking through abs).
Trapabs() — only reciting the name of abs.
Exabs() → Sara walking through abs.

abs()

Example

Short notes

Questions

abs()

Example

Short notes

Questions