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I want to concatenate an object property to a variable like this,

var foo = { bar_zen: 0, bar_jj: 0 }


var foo2 = $(this); // this comes from attr of an Id or class on click
if(foo.bar_+foo2+ == 0){ ..// do something }
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    Show the corresponding HTML as well. Also, $(this) does not correlate to an attribute or an id. It references an object. Commented Jul 7, 2017 at 19:00

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use bracket notation instead of dots:

if(foo["bar_" + foo2] == 0){ ..// do something }
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