Using variable variable names to access global.arrays

Asked Apr 02 '20 at 08:33

Active Apr 02 '20 at 08:33

Viewed 11 times

This is what I do today

    if (slot=="BARDAY") {
        adActiveTable = global.ad_BARDAY[0];
    } else if (slot=="FRONT") {
        adActiveTable = global.ad_FRONT[0];
    } else if (slot=="RIGHT") {
        adActiveTable = global.ad_RIGHT[0];
    } else if (slot=="TOPLIST") {
        adActiveTable = global.ad_TOPLIST[0];
    }

(etc... I got a LOT of them)

My queston is, why doesnt this work?

    adActiveTable = global.ad_[slot][0];

(that solution gives "Cannot read property 'FRONT' of undefined" if e.g. the slot is = "FRONT")

I even tried this

    adActiveTable = global.ad_[slot];

And still same error??

Is there no better way to do this? (no eval() please) :-)

asked Apr 02 '20 at 08:33

torbenrudgaard

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`global['ad_' + slot][0]`. – Tushar Apr 02 '20 at 08:34
let ne try right away – torbenrudgaard Apr 02 '20 at 08:35
global.ad_[slot][0]` this means `global` has a property called `.ad_` which is of time object. You are trying to fetch value for key stored in `slot` which is an array. And finally fetching its first item – Rajesh Apr 02 '20 at 08:36
global['ad_' + slot][0] worked perfectly - I kept using the "global dot" and kept getting errors. Thank you @Tushar – torbenrudgaard Apr 02 '20 at 08:38
This [answer](https://stackoverflow.com/a/24514304/3783478) in marked dupe addresses the situation in this post – Rajesh Apr 02 '20 at 08:38

Using variable variable names to access global.arrays

0 Answers0