The Lodash _.unsplatl() method takes a function expecting an array as its first argument and returns a function that works identically, but takes a list of leading arguments. It is similar to the unsplat() method. It mimics the rest parameter syntax in ECMAScript 6.
Syntax:
_.unsplatl( function )
Parameters: This method accepts a single parameter as mentioned above and discussed below:
- function: It is the original function that takes its first argument as an array.
Return Value: This method returns a function.
Note: To execute the below examples, you have to install the lodash-contrib library by using this command prompt and execute the following command.
npm install lodash-contrib
Example 1:
Javascript
// Defining lodash contrib variable var _ = require('lodash-contrib');Â Â Â function g (arr, val) { Â Â Â Â return val+" : "+arr; } Â Â var gfgFunc = _.unsplatl(g); Â Â console.log(gfgFunc(10, 20, 30, 40, "A")) |
Output:
A : 10, 20, 30, 40
Example 2:Â
Javascript
// Defining lodash contrib variable var _ = require('lodash-contrib');Â Â Â function g (arr) { Â Â Â Â return arr; } Â Â var gfgFunc = _.unsplatl(g); Â Â console.log(gfgFunc(1, 2, 3, 4)) |
Output:
[ 1, 2, 3, 4 ]
Example 3:Â
Javascript
// Defining lodash contrib variable var _ = require('lodash-contrib');Â Â Â function g (arr,val) { Â Â Â Â return arr.join(val); } Â Â var gfgFunc = _.unsplatl(g); Â Â console.log(gfgFunc("neveropen", "Computer Science Portal for Geeks", " : ")) |
Output:
neveropen : Computer Science Portal for Geeks
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