Javascript - object key- value

Question

var obj        a   A      b   B      c   C     console log obj a      return string   A   but i want to get by through a variable like this  var name    a   console log obj name     but return undefined   How to do this

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var o     cat    meow   dog    woof    var x   Object keys o    for  i 0  i lt x length  i        console log o x i            IAB

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Use this syntax   obj name    Note that obj x is the same as obj  x   for all valid JS identifiers  but the latter form accepts all string as keys  not just valid identifiers    obj  Hey  this is     neat      42

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https   jsfiddle net sudheernunna tug98nfm 1     var days       days  monday     true  days  tuesday     true  days  wednesday     false  days  thursday     true  days  friday     false  days  saturday     true  days  sunday     false  var userfalse 0 usertrue 0  for value in days       if days value       usertrue        else     userfalse             console log days value      alert  false  userfalse   alert  true  usertrue

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obj  quot a quot   is equivalent to obj a so use obj name  you get  quot A quot

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Use    notation for string representations of properties   console log obj name      Otherwise it s looking for the  name  property  rather than the  a  property

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I use the following syntax  objTest     quot error quot   true   quot message quot    quot test message quot     get error   var name    quot error quot   console log objTest name     get message   name    quot message quot   console log objTest name

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You can get value of key like this     x000D   x000D  var obj        a   A      b   B      c   C      console log obj a    console log obj  a      name    a   console log obj name   x000D   x000D   x000D

[javascript] Javascript - object key->value

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