One of my friend got this interview question.
HelloWorld.js
/* Concatenate the Arguments Passed to this method using the separator */
function concat(){
}
concat("Hello", "How", "are", "you") // Should return Hello How are you
Interviewer given above snippet and asked to implement concat function, without changing the signature.
First thing to understand is, JavaScript allows you to call a function with more arguments than it is formally declared to accept.
Second JavaScript maintains arguments of a function in an array ‘arguments’, using this we can access the arguments.
HelloWorld.js
/* Concatenate the arguments passed to this method using the separator */
function concat(){
var result = "";
for(arg of arguments){
result = result + arg + " ";
}
return result;
}
var result = concat("Hello", "How", "are", "you") // Should return Hello How are you
console.log(result);
Output
Hello How are you
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This post first appeared on Java Tutorial : Blog To Learn Java Programming, please read the originial post: here
