To get the last character of the string, call the substring() on the string, and the last character index as a start index: const str = 'JavaScript' const lastChar = str.substring(str.length - 1) console.log(lastChar) // t The substring() method extracts characters between the start...
Get the First Character of a String Using substr() in JavaScriptThe substr() method is an in-built method provided by JavaScript.This method cuts the string at two places. This cut happens by taking two inputs, the start index and a total number of characters after that.And...
array2];constnewArray=array1.concat(array2,array3,['a','b'],...nestedArray);console.log(newArray);// 输出: [1, 2, 3, 4, 5, 6, 7, 8, 9, 'a', 'b', [1, 2, 3], [4, 5, 6]]
lastName){ greetingMsg = greetingMsg + firstName + " " + lastName; } return { sendGreeting: function(firstName, lastName){ msgTo(firstName, lastName); } getMsg: function(){ return greetingMsg; } } } const createMsg = sayHello(); createMsg.send...
6.4 Never use eval() on a string; it opens too many vulnerabilities. eslint: no-eval 6.5 Do not unnecessarily escape characters in strings. eslint: no-useless-escape Why? Backslashes harm readability, thus they should only be present when necessary. // bad const foo = '\'this\' \i\s...
It will post a string to a worker that will simply concatenate it with something else. To do that, add the following code into the “helloworker.js” file:We’ve just defined inside “helloworkers.js” a piece of code that will be executed on another thread. It can receive messages ...
x =5;// Now x is a Number x ="John";// Now x is a String Try it Yourself » JavaScript Strings A string (or a text string) is a series of characters like "John Doe". Strings are written with quotes. You can use single or double quotes: ...
Object.valueOf( ) parseFloat( ) parseInt( ) RangeError ReferenceError RegExp RegExp.exec( ) RegExp.global RegExp.ignoreCase RegExp.lastIndex RegExp.source RegExp.test( ) RegExp.toString( ) String String.charAt( ) String.charCodeAt( ) String.concat( ) String.fromCha...
A collection of one or more characters between two single quotes, double quotes, or backticks. Example: 'a' 'Asabeneh' "Asabeneh" 'Finland' 'JavaScript is a beautiful programming language' 'I love teaching' 'I hope you are enjoying the first day' `We can also create a string using ...
JavaScript String: Exercise-22 with SolutionWrite a JavaScript function to get a part of string after a specified character.Test Data: console.log(subStrAfterChars('w3resource: JavaScript Exercises', ':','a')); console.log(subStrAfterChars('w3resource: JavaScript Exercises', 'E','b')); ...