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JavaScript Why is this line of code not working?

R

RyuuSan

New Coder
[CODE title="Processing.JS code"]if( (keyPressed === true) && (key === 'a') ) {println("yes");}[/CODE]

So what I'm looking for is to be able to type the "a" key and get "yes" in the (I think it's called a) console thing-y. (If this is stupidly simple, sorry, I'm a beginner.)
 
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Hey.

I think it'd be better if we got to see more of the code. Mainly where and how you've declared and initialised your variables. Also, I don't think that println() is actually a thing in JS, but maybe that's just me. I don't work with JS, but that doesn't mean that I cannot help you.
 
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Master Yoda said:
Hi @RyuuSan perhaps trying removing the second pair of () from your condition. Not sure if that will work but perhaps it might.
Click to expand...
No, that wouldn't change anything(At least, I don't think it would in JavaScript). I tested the same sort of thing in C and the syntax that he used(So, two pairs of parentheses inside a pair of parentheses), does work. Languages like JS inherit heavily from C, so if those two pairs of parentheses inside the condition were to be removed, it wouldn't change much at all, except for the way it was written.

Using something like pairs of parentheses inside a pair of parentheses is acceptable and it can possibly be used to make the code more readable, depending on the language, it's syntax, and the variables in use. Although, do note that there are times when a pair of parentheses inside a pair of parentheses are mandatory.
 
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Mathematical said:
No, that wouldn't change anything(At least, I don't think it would in JavaScript). I tested the same sort of thing in C and the syntax that he used(So, two pairs of parentheses inside a pair of parentheses), does work. Languages like JS inherit heavily from C, so if those two pairs of parentheses inside the condition were to be removed, it wouldn't change much at all, except for the way it was written.

Using something like pairs of parentheses inside a pair of parentheses is acceptable and it can possibly be used to make the code more readable, depending on the language, it's syntax, and the variables in use. Although, do note that there are times when a pair of parentheses inside a pair of parentheses are mandatory.
Click to expand...
It doesn’t hurt to try it..
 
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if kePressed is boolean all you need to do is check it.

JavaScript: 
keyPressed = true;

key = 'a';

if (keyPressed && key === 'a') {

    console.log('yes');

} else {

    console.log('no');

}
 
Last edited by a moderator:
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exocoder said:
if kePressed is boolean all you need to do is check it.

keyPressed = true;
key = 'a';
if (keyPressed && key === 'a') {
console.log('yes');
} else {
console.log('no');
}
Click to expand...
Thank you for sharing your solution! However, just make sure you wrap your code BBCode. Makes it easier to look at :)
 
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Most likely because the key pressed doesn't actually have a normal value.
So for example, in JS the key code for the letter 'a' would be '97'. This might be a problem if the key variable is grabbing the unicode value of the key instead of the letter "a".
www.w3schools.com

W3Schools online HTML editor

The W3Schools online code editor allows you to edit code and view the result in your browser
www.w3schools.com
 
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Ghost said:
Most likely because the key pressed doesn't actually have a normal value.
So for example, in JS the key code for the letter 'a' would be '97'. This might be a problem if the key variable is grabbing the unicode value of the key instead of the letter "a".
www.w3schools.com

W3Schools online HTML editor

The W3Schools online code editor allows you to edit code and view the result in your browser
www.w3schools.com
Click to expand...
That honestly sounds like that could be it! Very neat. Thanks for sharing the link @Ghost.

@RyuuSan has this helped you?
 
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Mathematical said:
Hey.

I think it'd be better if we got to see more of the code. Mainly where and how you've declared and initialised your variables. Also, I don't think that println() is actually a thing in JS, but maybe that's just me. I don't work with JS, but that doesn't mean that I cannot help you.
Click to expand...

Oh, I'm coding with Processing.JS right now. I couldn't find it on the menu so I just picked JavaScript.
 
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