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lightning expressions by key access

Lightning Experience

Lightning expressions allow accessing properties via point notation.
Here is the challenge: what if the property name is not know during the coding.

It would be nice to have access by dynamic property name
in other words obj[colName] gives more flexibility then obj.colName, because colName can be dynamic.

<aura:iteration items="{!v.cols}" var="eachCol">
<ui:outputText value="{!v.obj[eachCol]}"/>
</aura:iteration>


 

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