Can we Increment the global variable name inside a for loop like a variable when using Postman

Question

I am trying to parse the response data and getting the values for the "id". Since I am expecting multiple values for the same response I am putting it into an array. Inside a for loop I increment the array with the index set to i. Each of these values i need to pass it to a global variable like var_id0, var_id1... var_idn.

Can the numeric against the global name "var_id" be incremented inside the for loop?

I looked up multiple examples but none are showing me if such a thing can be done when setting the global variable.

var index_id= [];
var jsonData = JSON.parse(responseBody);
for (var i = 0; i < jsonData.list.length; i++) {  
    var counter = jsonData.list[i];
    index_id[i] = counter.id;
    pm.globals.set("var_id"[i], index_id[i]) <<-- How can this be achieved.
    //pm.globals.set("variable name", "variable value") --> Actual syntax.
}

My expectation is that till the end of the for loop is reached, with each loop the global variable name, will be incremented by 1 and the corresponding value will be set. For eg:

var_id1 = "700" var_id2 = "800"...

score 2 · Accepted Answer · answered Jul 09 '19 at 12:15

2

"var_id"[i] means look up the ith index in "var_id", and for strings that will evaluate to the character at position i, so "var_id"[0] would be "v". Instead, you want to build up strings by appending i to "var_id", that can be done with +.

answered Jul 09 '19 at 12:15

Jonas Wilms

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1

Hi Jonas Wilms, that worked like a charm. Thank you. By adding a +, as you mentioned, it helps add a numeric against the global variable name. Thank you. – Kiran Cherian Jul 09 '19 at 12:25

xchrisbradley · Answer 2 · 2019-07-09T12:38:06.037

1

Change

pm.globals.set("var_id"[i], index_id[i])

To

pm.globals.set(`var_id${i}`, index_id[i])

edited Jul 09 '19 at 12:38

answered Jul 09 '19 at 12:20

xchrisbradley

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Hi Christopher Bradley, The problem with the above is that globals.set takes everything inside the quotes as the variable name and does not go about appending the values as desired. – Kiran Cherian Jul 09 '19 at 12:27
Ah I see, do you have a sample of the response. I know you marked one as the answer but maybe theirs a more efficient way if i had a example of the response. Cheers! – xchrisbradley Jul 09 '19 at 12:30
This is what i caught in the global setting for the Postman: VARIABLE INITIAL VALUE CURRENT VALUE var_id${[i]} 747 747 – Kiran Cherian Jul 09 '19 at 12:32
Ahh, i messed up on my end, check my edited answer without the brackets. – xchrisbradley Jul 09 '19 at 12:38
var_id${i} 732 732 – Kiran Cherian Jul 09 '19 at 12:42

score 1 · Answer 3 · answered Jul 09 '19 at 12:43

1

Why do you need all this global variables? Define one global array and push your values into it. Then access them by index. Almost the same syntax as you wanted.

answered Jul 09 '19 at 12:43

Polina F.

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yılmaz · Answer 4 · 2019-07-09T12:34:35.023

-3

You can use eval function.

var index_id= [];
var jsonData = JSON.parse(responseBody);
for (var i = 0; i < jsonData.list.length; i++) {  
    var counter = jsonData.list[i];
    index_id[i] = counter.id;
    eval("var_id"+i+"="+index_id[i]);
    //pm.globals.set("var_id"[i], index_id[i]) <<-- How can this be achieved.
    //pm.globals.set("variable name", "variable value") --> Actual syntax.
}

edited Jul 09 '19 at 12:34

answered Jul 09 '19 at 12:16

yılmaz

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thanks for a down vote without explanation. eval is sometimes not evil, accept it. :) – yılmaz Jul 09 '19 at 12:21
It's completely unesseccary here though, and you still have `"var_id"[i]`. – Paul Jul 09 '19 at 12:25
@Paulpro Do you mean the line after the line with eval? Which part is unnecessary? – yılmaz Jul 09 '19 at 12:33

Can we Increment the global variable name inside a for loop like a variable when using Postman

4 Answers4