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Lodash _.startsWith

Overview

Lodash is a popular JavaScript utility library that provides various convenient and performant functions to work with arrays, objects, strings, and other data types. One of the many helpful methods provided by Lodash is the _.startsWith function used for string manipulation.

The _.startsWith() method checks if a given string starts with the specified substring or characters. It returns a boolean result, which is true if the string starts with the substrings and false if it doesn't.

The syntax for _.startsWith() method is as follows:

_.startsWith(string, target, position)

Here, "string" is the input string to check for the start of the substring, "target" is the substring to check if located at the beginning of "string", and "position" is an optional parameter that specifies the position to start searching from.

The method returns a boolean value of true if the "string" starts with the "target" substring, and false otherwise.

An example of using the _.startsWith() method to check whether a given string starts with a specified prefix is as follows:

const string = 'Lorem ipsum dolor sit amet';
_.startsWith(string, 'Lorem'); // returns true
_.startsWith(string, 'lorem'); // returns false

In this example, we have a string "string" that contains a sample sentence, followed by two function calls to the _.startsWith() method. The first call checks whether the string starts with the prefix "Lorem", which is true. The second call, however, checks whether the string starts with the prefix "lorem", which is false because the method is case sensitive.

Overall, the _.startsWith() method is a powerful utility function to use in your JavaScript projects for quick and efficient string matching and manipulation.