Programming-Idioms

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Idiom #135 Remove item from list, by its value

Remove at most 1 item from list items, having value x.
This will alter the original list or return a new list, depending on which is more idiomatic.
If there are several occurrences of x in items, remove only one of them. If x is absent, keep items unchanged.

for i, y := range items {
	if y == x {
		copy(items[i:], items[i+1:])
		items[len(items)-1] = nil
		items = items[:len(items)-1]
		break
	}
}
for i, y := range items {
	if y == x {
		items = append(items[:i], items[i+1:]...)
		break
	}
}
erase(items, x);

using System.Collections.Generic;
items.Remove(x);
import std.algorithm;
items = items.remove(items.countUntil!(a => a == x));
items.remove(x);

List.delete(items, x)
integer, dimension(:), allocatable :: items

i = findloc(items, x)
if (i /= 0) items = [items(1:i-1), items(i+1:)]
import Data.List
delete x items
Java.utils.List
items.stream().findFirst().filter(item -> "x".equals(item)).ifPresent(removeIndex -> items.remove(removeIndex));
$list_position = array_search($x, $items);
$specific_item = $items[$position];
unset($specific_item);
uses classes;
i := items.IndexOf(x);
if i <> -1 then
  items.delete(i);
use List::UtilsBy qw(extract_first_by);
extract_first_by { $x eq $_ } @items;
items.remove(x)
i = items.index(x)
items.delete_at(i) unless i.nil?
if let Some(i) = items.first(&x) {
    items.remove(i);
}
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Related idioms

for i, y := range items {
	if y == x {
		copy(items[i:], items[i+1:])
		items[len(items)-1] = nil
		items = items[:len(items)-1]
		break
	}
}
for i, y := range items {
	if y == x {
		items = append(items[:i], items[i+1:]...)
		break
	}
}
erase(items, x);

items.Remove(x);
items = items.remove(items.countUntil!(a => a == x));
items.remove(x);

List.delete(items, x)
integer, dimension(:), allocatable :: items

i = findloc(items, x)
if (i /= 0) items = [items(1:i-1), items(i+1:)]
delete x items
items.stream().findFirst().filter(item -> "x".equals(item)).ifPresent(removeIndex -> items.remove(removeIndex));
$list_position = array_search($x, $items);
$specific_item = $items[$position];
unset($specific_item);
i := items.IndexOf(x);
if i <> -1 then
  items.delete(i);
extract_first_by { $x eq $_ } @items;
items.remove(x)
i = items.index(x)
items.delete_at(i) unless i.nil?
if let Some(i) = items.first(&x) {
    items.remove(i);
}