Set up a map in js using json

  • 2020-03-30 02:46:14
  • OfStack

How to set up a map (actually using a json implementation)
var a = {}; 
a["key1"] = "value1"; 
a["key2"] = "value2"; 

Since it's a map, there's a way to retrieve whether a key exists or not
if ("key1" in a) { 
// something 
} else { 
// something else 

A simple one-sentence way to declare the key and value in the map:
var a = {'key1': 'value1', 'key2': 'value2'} 

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