Update_first

By Goblin Docs ~ 6 min read

Update First replaces the first value in a collection.

Overview

update_first replaces the first value in a collection.

items | [1, 2, 3]

:update_first!(items, 99)

items | [1, 2, 3]

:update_first!(items, 99)

Result:

[99, 2, 3]

[99, 2, 3]

Like most collection utilities, update_first follows Goblin's bang (!) rules.

JavaScript	Python	Java	C#	Ruby	PHP
assignment	assignment	`set()`	assignment	`[]=`	assignment
`splice()`	slice assignment	`replaceAll()`	`Replace()`	`replace`	`array_replace()`
`fill()`	list comprehension	update loop	`Select()`	`map!`	`array_map()`