unshift

Meanings

• Verb

  To add one or more elements to the beginning of an array, shifting the existing elements towards the end.

  - "let numbers = [1, 2, 3]; numbers.unshift(0); // Output: [0, 1, 2, 3]"
  - "myArray.unshift('apple'); // Adds 'apple' to the beginning of myArray"

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Variants

List of all variants of unshift that leads to same result
unship , unshipped , unshipping , unships

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Etymology

origin and the way in which meanings have changed throughout history.

The name 'unshift' comes from the combination of 'un-' (meaning 'reverse') and 'shift' (meaning 'move or change the position of something'). It was introduced in the ECMAScript 1 specification in 1996.

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Trivia

Any details, considerations, events or pieces of information regarding the word

1. The 'unshift' method can be used with both arrays and strings in JavaScript.

2. The 'unshift' method can change the original array, unlike the 'concat' method which returns a new array.

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Related Concepts

informations on related concepts or terms closely associated with the word. Discuss semantic fields or domains that the word belongs to

1. shift: A JavaScript method used to remove the first element from an array and return that element, while shifting the remaining elements towards the beginning.

2. array: A data structure used to store a collection of elements, each identified by an index or key.

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How to Memorize "unshift"

1. visualize
   

   - Imagine an array, and visualize adding new elements at the beginning, while the existing elements move towards the end.

2. associate
   

   - Associate the 'unshift' method with the idea of 'adding new elements to the beginning of an array'.

3. mnemonics
   

   - Use the mnemonic 'Uppers First' to remember 'unshift' meaning 'adding elements to the beginning of an array'.

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