Syntax, Parameter and Return Value
Syntax:
_.parseInt(string, [radix=10])
Parameters:
-
string (string): The string to convert.
- [radix=10] (number): The base to parse the integer in (between 2 and 36).
Return Value:
(number) - Returns the converted integer.
Examples
Basic Integer Parsing:
JavaScript
var _ = require('lodash');
var numString = '42';
console.log(_.parseInt(numString));
You can also try this code with Online Javascript Compiler
Output:
42
Demonstrates converting a basic numeric string to an integer.
Parsing with Different Radix:
JavaScript
var hexString = '2A';
console.log(_.parseInt(hexString, 16));
You can also try this code with Online Javascript Compiler
Output:
42
Shows parsing a hexadecimal string to an integer.
Handling Leading Zeros:
JavaScript
var octalString = '052';
console.log(_.parseInt(octalString, 8));
You can also try this code with Online Javascript Compiler
Output:
42
An example of correctly parsing an octal string by specifying the radix.
Parsing Binary String:
JavaScript
var binaryString = '101010';
console.log(_.parseInt(binaryString, 2));
You can also try this code with Online Javascript Compiler
Output:
42
Demonstrates parsing a binary string to its integer equivalent.
Frequently Asked Questions
How does _.parseInt() differ from JavaScript's native parseInt()?
Lodash's _.parseInt() is similar to the native parseInt(), but it's often preferred for its readability and explicit radix handling. It also integrates seamlessly with other Lodash utilities.
What happens if the string cannot be converted to an integer?
If _.parseInt() encounters a string that cannot be converted to a valid integer, it returns NaN (Not a Number).
Is specifying the radix important?
Specifying the radix is important for accurately parsing strings with different number bases. For decimal strings, the radix can be omitted as it defaults to 10.
Conclusion
Lodash's _.parseInt() method is an effective tool for converting strings to integers, offering clarity and consistency, particularly when dealing with various number bases. It ensures accurate and reliable integer parsing, essential in many data processing and user input handling scenarios.
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