Today, we’re going to do another coding challenge. For this one, we’re going to build a function (or maybe a few of them) that we can use to check if all of the characters in a string are unique. You can go off and try to complete it on your own, then
The “toLowerCase is not a function” error occurs, when we call a toLowerCase() method on a value which is not a string. To solve the error, convert the value to an string before calling the toLowerCase() method on it or make sure to use the toLowerCase() method on a valid ...
So, with the 4.98, it was round down to 4, and the number 17 was left as it is. Summary To round down numbers in JavaScript, we can make use of two static Math method - floor and trunc - which work in different ways but achieve the set goal. References Math.round() - JavaScript...
I needed to get the first part of a string.Basically everything before a specific character, -.Here’s how I did it:const str = 'test-hey-ho' str.split('-')[0] //'test'Written on Jul 24, 2022 → Get my JavaScript Beginner's Handbook I wrote 19 books to help you become a ...
Learn how to convert a string to a number using JavaScriptTHE AHA STACK MASTERCLASS Launching May 27th JavaScript provides various ways to convert a string value into a number.Best: use the Number objectThe best one in my opinion is to use the Number object, in a non-constructor context ...
To capitalize the first letter in a string is easy if you undertake some steps.First of all you should get the first letter of the string by setting the charAt() method at 0 index:Javascript charAt method1 2 let string = "w3docs.com"; console.log(string.charAt(0)); // Returns...
On each iteration, we return a new array with the key converted to lowercase. This gives us an array of key-value pairs where all keys are lowercase. index.js // 👇️ [ [ 'name', 'bobby hadz' ], [ 'age', 30 ] ]console.log([['NAME','bobby hadz'],['AGE',30],].map(...
代码语言:javascript 代码运行次数:0 运行 AI代码解释 protected void deployApps() { if (!(host instanceof Deployer)) return; if (debug >= 1) log(sm.getString("hostConfig.deploying")); File appBase = appBase(); if (!appBase.exists() || !appBase.isDirectory()) return; String files[]...
We can use theString.replace()method to remove all whitespace from our string, and theString.toLowerCase()method to convert it to lowercase. We’ll assign the normalized string to thevalvariable, and use that instead. /*** Check if the attribute is potentially dangerous* @param {Strin...
String Primitives and String Objects First, we will clarify the two types of strings. JavaScript differentiates between thestring primitive, an immutable datatype, and theStringobject. In order to test the difference between the two, we will initialize a string primitive and a string object. ...