Idiom #224 Add element to the beginning of the list

Insert the element x at the beginning of the list items.

(def items2 (conj items x))

#include <list>

items.emplace_front(x);

#include <list>

items.push_front(x);

using System.Linq;

items = items.Prepend(x).ToList();

items.Insert(0, x);

items = x ~ items;

items = [x, ...items];

items2 = [x | items]

items = [x, items]

func prepend[S ~[]T, T any](items *S, x ...T) {
	*items = append(*items, x...)
	copy((*items)[len(x):], *items)
	copy(*items, x)
}

func prepend[S ~[]T, T any](items *S, x ...T) {
	*items = append(x, *items...)
}

items = append([]T{x}, items...)

items = append(items, x)
copy(items[1:], items)
items[0] = x

f(x:xs)= x:xs

items2 = x : items

items = [x, ...items];

items.unshift(x);

items.add(0, x);

table.insert(items, 1, x)

array_unshift($items, $x);

items.insert(0,x);

unshift @items, $x

items.insert(0, x)

items = [x] + items

items.prepend(x)

items.unshift(x)

use std::collections::VecDeque;

items.push_front(x);

val newList = x :: items

Imports System.Linq

items = items.Prepend(x).ToList()

items.Insert(0, x)

Do you know the best way to do this in your language ? New implementation...

< > ⌨

Idiom created by programming-idioms.org

History

Related idioms

Issues