CODEWITHSUNDEEP
javascript
Fred J.
Fred J.

Reputation: 6019

check if string1 contains string2 without knowing which is 1 or 2

In javascript, given a string "body" and another string "bodyguard", How can I return true since one string is part of the other with out knowing their order of presentation to the code? i.e.
let string1 = 'body', string2 = 'bodyguard' or
let string1 = 'bodyguard', string2 = 'body'?

And without knowing if it is the first or the last part, so long as one string is completely part of the other, without knowing which is the longer of the two. thx

Upvotes: 0

Views: 1775

Answers (4)

LellisMoon
LellisMoon

Reputation: 5020

let string1 = 'body', string2 = 'bodyguard';
let string3 = 'bodyguard', string4 = 'body';

var controlString=function(str1,str2){
  return (str1.indexOf(str2)!==-1||str2.indexOf(str1)!==-1);
};
console.log(controlString(string1,string2));
console.log(controlString(string3,string4));

Upvotes: 1

T.J. Crowder
T.J. Crowder

Reputation: 1074138

Just check both ways:

if (str1.includes(str2) || str2.includes(str1)) {
    // It's one of them
}

Or always check the longer one for the shorter one

let [longer, shorter] = str1.length > str2.length ? [str1, str2] : [str2, str1];
if (longer.includes(shorter) != -1) {
    // It's one of them
}

(You used let, so I assume it's okay to use destructuring assignment and String#includes, as all are ES2015+.)

If you don't want to use String#includes, though, str.indexOf(otherStr) != -1 does effectively the same thing.

Upvotes: 4

Reda Maachi
Reda Maachi

Reputation: 857

You can use this in Javascript :

var string1 = "body";
var string2 = "bodyguard";
if(string1.includes(string2) || string2.includes(string1)){
    // DO WHAT YOU WANT
}   else {

}


var string1 = "body";
var string2 = "bodyguard";
if(string1.includes(string2) || string2.includes(string1)){
	document.getElementById("demo").innerHTML = "One string is part of another" ;
}	else {
	document.getElementById("demo").innerHTML = "No string is part of another" ;
}
<p id="demo"></p>

Upvotes: 0

Dani&#235;l Camps
Dani&#235;l Camps

Reputation: 1809

You can check if either string contains the other (not tested but should work):

if ((string1.indexOf(string2) !== -1) || (string2.indexOf(string1) !== -1)){
//do something
}

Upvotes: 1

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