JavaScript var inside string

Question

I know that you can use ${} inside a string to put a var but here it seems it doesn't want to recognise the var and it is not in the brackets

var str = s.toLowerCase();
        var counts = {};
        var ch, index, len, count;

        for (index = 0, len = str.length; index < len; ++index) {
            ch = str.charAt(index);
            count = counts[ch];
            counts[ch] = count ? count + 1 : 1;
        }
        for (ch in counts) {
            console.log('${ch}(${counts[ch]})');
        }

Are you sure something like this exists without defining an extra function to handle this? — PotatoManager
– PotatoManager, Commented Jul 29, 2017 at 17:55

PeterMader · Accepted Answer · 2017-07-29 18:09:34Z

2

ES2015 template literals require a back tick:

console.log(`${ch}(${counts[ch]})`);

Working example:

const s = 'An example string with some duplicate characters.';

var str = s.toLowerCase();
var counts = {};
var ch, index, len, count;

for (index = 0, len = str.length; index < len; ++index) {
  ch = str.charAt(index);
  count = counts[ch];
  counts[ch] = count ? count + 1 : 1;
}
for (ch in counts) {
  console.log(`${ch}(${counts[ch]})`);
}

edited Jul 29, 2017 at 18:09

answered Jul 29, 2017 at 17:57

PeterMader

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4 Comments

Яни Георгиев Over a year ago

the problem is not in the brackets

PeterMader Over a year ago

What do you mean? Where is it, then?

Яни Георгиев Over a year ago

i want to be inside 1 string

PeterMader Over a year ago

There's only one string literal. Could you please clarify what the result should look like?

jpstone · Accepted Answer · 2017-07-29 17:56:24Z

1

You need to use the back tick. Use ` instead of '.

answered Jul 29, 2017 at 17:56

jpstone

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Comments

David Koplik · Accepted Answer · 2017-07-29 17:56:47Z

1

You need to put your string inside ``, not ''.

var myVar = 'hello world!';
console.log(`${myVar}`);

answered Jul 29, 2017 at 17:56

David Koplik

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