Lodash is a JavaScript library that works on the top of underscore.js. Lodash helps in working with arrays, strings, objects, numbers, etc.
The _.cond method creates a function that iterates over pairs and invokes the corresponding function of the first predicate to return truthy. The predicate-function pairs are invoked with the binding and arguments of the created function.
Syntax:
_.cond(pairs)
Parameters: This method accepts one parameter as mentioned above and described below:
- pairs: [Array]The predicate-function pairs.
Return Value: [Array]The predicate-function pairs.
Note : Here, const _ = require(‘lodash’) is used to import the lodash library in the file.
Example 1:
Javascript
// Requiring the lodash library const _ = require("lodash"); // using _.cond() method var func1 = _.cond([ [_.matches({ 'neveropen': 1 }), _.constant('Matches Geeks')], [_.conforms({ 'for': _.isNumber }), _.constant('Matches For')], [_.stubTrue, _.constant('no match')] ]); // Storing the Result gfg = func1({ 'neveropen': 1, 'b': 2 }); // Printing the output console.log(gfg); |
Output:
"Matches Geeks"
Example 2:
Javascript
// Requiring the lodash library const _ = require("lodash"); // using _.cond() method var func2 = _.cond([ [_.matches({ 'neveropen': 1 }), _.constant('Matches Geeks')], [_.conforms({ 'for': _.isNumber }), _.constant('Matches For')], [_.stubTrue, _.constant('No Match')] ]); // Storing Result gfg1 = func2({ 'neveropen': 0, 'for': 1 }); gfg2 = func2({ 'neveropen': '1', 'for': '2' }); // Printing the output console.log(gfg1); console.log(gfg2) |
Output:
"Matches For" "No Match"
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