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What is the _.pairs() method in underscore.js?
Overview
With the underscore.js node module, we can manipulate arrays and objects with simple functions. The pairs() method converts an object to a single array containing key-value pairs. These key-value pairs will be in the form of arrays.
Syntax
Here's the syntax for underscore.js:
_.pairs(object)
The syntax for the pairs() method using underscore.js
Parameters
object: This is the object we want to convert.
Return value
The value returned is an array. This array will contain key-value pairs in the form of an array, which are the properties and values of the object.
Example
// require underscoreconst _ = require("underscore")// create some objectslet obj1 = {one: 1, two: 2, three: 3, four: 4}let obj2 = {name: "nodejs", package: "underscore", tag: "_"}let obj3 = {a: "Apple", b: "Banana"}let obj4 = {M: "Monday", T: "Tuesday", W: "Wednesday"}// convert the objects using pairs() methodlet arr1 = _.pairs(obj1)let arr2 = _.pairs(obj2)let arr3 = _.pairs(obj3)let arr4 = _.pairs(obj4)// print the resultsconsole.log(arr1)console.log(arr2)console.log(arr3)console.log(arr4)
Explanation
- Line 2: We require the
underscoremodule. - Lines 5–8: We create some objects.
- Lines 11–14: We convert each object using the
pairs()method and save the results. - Lines 17–20: We print the results to the console.
RELATED TAGS
underscore.js
CONTRIBUTOR
Theodore Kelechukwu OnyejiakuTRENDING TOPICS
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