How can I convert my variable into a string?

Question

I have a variable named input which is coming directly from a mySQL database.

GROUP_CONCAT(name,"(",id,")" SEPARATOR ",") AS data

When I test, if it is a string, then the output is "no"

 "render": function (data, type, row) {

    var input = data;

    if (Object.prototype.toString.call(input) == '[object String]') {
      console.log("yes");
    } else {
      console.log("no");
   }
},

But I need the output to be "yes"...

I tested to convert the input input.toString(); But then I do not get any output at all

I edited your code to be in an exectuable snippet. As you can see it works fine. This means that your `input` variable *is not a string*. Are you sure it's not an array of strings? — Rory McCrossan, Nov 24 '17 at 09:22
When running your code in the console, I get the correct result: https://i.imgur.com/yjNBPrr.png — nbokmans, Nov 24 '17 at 09:23
@nbokmans Yes of course this code is working. But my variable is coming from a database and is not a string. This is my problem — peace_love, Nov 24 '17 at 09:30
@Jarla: How do you expect us to fix code that is working fine? Try posting code that doesn't work. i.e. the actual variable value that you *are* using — musefan, Nov 24 '17 at 09:31
If you select it correctly you shouldn't need to convert it at all — Rory McCrossan, Nov 24 '17 at 09:38

ssc-hrep3 · Answer 1 · 2017-11-24T09:23:25.627

2

You could use typeof instead:

var input = 'cat(13),dog(12),bird(14)';

if (typeof input === "string") {
   console.log('yes');
} else {
   console.log('no');
}

This question was already discussed here: StackOverflow Question

edited Nov 24 '17 at 09:23

answered Nov 24 '17 at 09:22

ssc-hrep3

15,024
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While better code, this isn't what the OP is asking. – Rory McCrossan Nov 24 '17 at 09:23
2

You can clearly see that the executable snippet gives the correct result. You are implementing it incorrectly. Show all your code. – nbokmans Nov 24 '17 at 09:29
Updated my question – peace_love Nov 24 '17 at 09:46

Vaibhav Bhavsar · Accepted Answer · 2017-11-24T09:30:04.573

-1

You can use String(param) function for converting your variable into a string.

i.e.

String(input);

edited Nov 24 '17 at 09:30

answered Nov 24 '17 at 09:26

Vaibhav Bhavsar

432
4
12

What does this try to answer? `Object input` is not even valid JS. – nbokmans Nov 24 '17 at 09:27
Wonderful! This was exaclty what I was looking for! – peace_love Nov 24 '17 at 09:35
@Jarla this is a bit of a hacky way to solve your problem. I'd suggest checking exactly what `input` ***is*** and where it's coming from. Sadly you gave us the irrelevant part of your code so we can't really help you with that – Rory McCrossan Nov 24 '17 at 09:37
@RoryMcCrossan I updated my code, maybe now it is more clear. – peace_love Nov 24 '17 at 09:45
Not really. That's the SQL. We need the JS code that retrieves it – Rory McCrossan Nov 24 '17 at 10:14

How can I convert my variable into a string?

2 Answers2