CODEWITHSUNDEEP
javascript
danteMingione
danteMingione

Reputation: 75

How do I do case-insensitive comparisons in JavaScript?

I'm making a simple switch function:

var game = prompt("What game do you want to play?");

switch(game) {
    case 'League of Legends':
        console.log("You just played that!");
    //more case statements snipped... //
    break;
}

If the user puts league of legends, not League of Legends would it catch that or would it reset to the default answer at the bottom of all my cases? Furthermore, how would I change it so both answers, capitalized and not, worked?

Upvotes: 1

Views: 6255

Answers (5)

ydoow
ydoow

Reputation: 2996

The string 'league of legends' and 'League of Legends' are different so that would fall to the default at the bottom of all your cases.

To make it work, you may use

switch(game.toUpperCase()) {
    case 'LEAGUE OF LEGENDS':
        console.log("You just played that!");
    //more case statements snipped... //
    break;
}

Upvotes: -1

Shannon
Shannon

Reputation: 837

String.toLowerCase()

In javascript the character 'L' doesn't equal the character 'l'. Therefore 'League of Legends' wouldn't match 'league of legends'. By converting the users input to all lowercase and then matching it to a lowercase string in your switch statement, you can guarantee your program won't discriminate based on case.

Your code with toLowerCase()

var game = prompt("What game do you want to play?");
game = game.toLowerCase();

switch(game) {
    case 'league of legends':
        console.log("You just played that!");
    //more case statements snipped... //
    break;
}

Upvotes: -1

plalx
plalx

Reputation: 43718

String compare is case-sensitive, therefore you should either upper-case everything using yourString.toUpperCase() or lowercase with yourString.toLowerCase() if your code needs to be case-insensitive.

Upvotes: 0

tozlu
tozlu

Reputation: 4865

You can use String.toLowerCase() or String.toLocaleLowerCase()

game.toLowerCase();

Upvotes: 0

Paul Roub
Paul Roub

Reputation: 36438

Switch on a lower-cased version of the game:

switch (game.toLowerCase()) {
  case 'league of legends':
    console.log("You just played that!");
    break;
}

Upvotes: -1

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