Add Element To The Beginning Of The List, In C# - Programming Idioms

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Idiom #224 Add element to the beginning of the list

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

• C#
• C#
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• C#

items.Insert(0, x);

• Doc

• C#

using System.Linq; items = items.Prepend(x).ToList();

• Doc

• Clojure
• C++
• C++
• D
• Dart
• Elixir
• Fortran
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• Go
• Go
• Go
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(def items2 (conj items x))

• Demo
• Doc

#include <list> items.emplace_front(x);

• Doc

#include <list> items.push_front(x);

• Doc

items = x ~ items;

• Demo
• Doc

items = [x, ...items];

• Doc

items2 = [x | items] items = [x, items] items = append([]T{x}, items...)

• Demo

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

• Demo

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

• Demo

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

• Demo

f(x:xs)= x:xs items2 = x : items items = [x, ...items]; items.unshift(x);

• Doc

items.add(0, x);

• Doc

(push x items)

• Doc

table.insert(items, 1, x) array_unshift($items, $x);

• Demo
• Doc

items.insert(0,x); unshift @items, $x

• Doc

items.insert(0, x)

• Doc

items = [x] + items items.prepend(x)

• Doc

items.unshift(x)

• Doc

use std::collections::VecDeque; items.push_front(x);

• Demo
• Doc

val newList = x :: items Imports System.Linq items = items.Prepend(x).ToList()

• Doc

items.Insert(0, x)

• Doc

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Related idioms

• Add an element at the end of a list
• Concatenate two lists

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• C#

items.Insert(0, x);

• C#

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

• Clojure

(def items2 (conj items x))

• C++

items.emplace_front(x);

• C++

items.push_front(x);

• D

items = x ~ items;

• Dart

items = [x, ...items];

• Elixir

items2 = [x | items]

• Fortran

items = [x, items]

• Go

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

• Go

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

• Go

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

• Go

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

• Haskell

f(x:xs)= x:xs

• Haskell

items2 = x : items

• JS

items = [x, ...items];

• JS

items.unshift(x);

• Java

items.add(0, x);

• Lisp

(push x items)

• Lua

table.insert(items, 1, x)

• PHP

array_unshift($items, $x);

• Pascal

items.insert(0,x);

• Perl

unshift @items, $x

• Python

items.insert(0, x)

• Python

items = [x] + items

• Ruby

items.prepend(x)

• Ruby

items.unshift(x)

• Rust

items.push_front(x);

• Scala

val newList = x :: items

• VB

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

• VB

items.Insert(0, x)