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JSON data are very easy to parse and use. It is fast to access and manipulate JSON data as they only contain texts. JSON is language independent. You can create and use JSON in other programming languages too. Also Read: JavaScript Program to Convert Objects to Strings ...
toLocaleString() Returns a string with a language-sensitive representation of a number. Example: JavaScript Number Methods // check if num1 is integer let num1 = 12; console.log(Number.isInteger(num1)); // true // check if num2 is NaN let num2 = NaN; console.log(Number.isNaN(num2...
entries() Return Value Returns a newArrayiterator object. Note: Theentries()method does not change the original array. Example 1: Using entries() Method // defining an arrayconstlanguages = ["Java","C","C++","Python"]; // array iterator object that contains// key-value pairs for each ...
"Programiz JavaScript".indexOf("",0);// returns 0"Programiz JavaScript".indexOf("",3);// returns 3// string length here is 20"Programiz JavaScript".indexOf("",25);// returns 20"Programiz JavaScript".indexOf("",21);// returns 20 ...
Output: [ 'programming', index: 20, input: 'JavaScript is a fun programming language.', groups: undefined ] */ match() Syntax The syntax of thematch()method is: str.match(regexp) Here,stris a string. match() Parameters Thematch()method takes in: ...
So the method just replace the element oflanguage[1]andlanguage[2]with'JavaScript'. Example 3: fill() Method with Invalid Indexes varrank = [8,9,3,7]; // on passing negative index, counting starts from backrank.fill(15,-2);
The above examples help to test some quirky behaviors of JavaScript. They don't have to be memorized and are in fact grasped as we get familiar with the language. Notes: The==operator applies various coercions to both sides (if not the same Type) before testing for equality whileObject.is...
And finally, we have looped throughiteratorthat prints the key for each element oflanguage. Example 2: Using key() Method in Array with Holes The iterator object doesn't skip holes in the array. It also holds the key for empty slots in the array. For example: ...