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Lodash _.parseInt

Overview

Introduction:

Lodash is a JavaScript library that provides utility functions for common programming tasks. One of the functions provided by Lodash is _.parseInt, which is used to convert strings to integers.

Syntax:

_.parseInt(string, [radix])

Parameters:

  • string (string): The string to parse.
  • [radix=10] (number): The radix to use for parsing.

Return Value:

The _.parseInt method returns an integer parsed from the string. If the string cannot be converted to an integer, the method returns NaN.

Usage:

The _.parseInt method is commonly used in situations where a string needs to be converted to an integer. For example, it can be used to convert user input from a form into a number:

let userInput = "42";
let parsedInput = _.parseInt(userInput);

console.log(parsedInput); // Output: 42

The method can also be used with a radix argument to specify which base the number should be interpreted in. For example, if the radix is set to 16, the method will interpret the string as a hexadecimal number:

let hexString = "0xFF";
let parsedHex = _.parseInt(hexString, 16);

console.log(parsedHex); // Output: 255

Conclusion:

In conclusion, _.parseInt is a useful method provided by the Lodash library for converting strings to integers. Its simplicity and flexibility make it a common choice for developers when dealing with user input or other string data that needs to be converted to numbers.