JS implementation of dynamic key value (JSON string considerations: Key and Value are double quotes, the official website is specified in double quotation marks)

1, JSON string considerations: Key and value are double quotation marks, the official website is specified with double quotation marks, as follows:

var mapstr= ' {' A ': ' A ', ' B ': ' B '} ';

var map=json.parse (MAPSTR);

So by stitching strings, JSON parsing gets keyvalue

var str= ' a ';

map[str];//output A

2, also by stitching the string to get keyvalue, using the Eval method to parse the array, note that the arrays

var mapstr= ' [{"A": "A", "B": "B"}] ';

var map=eval (MAPSTR) [0];

map[' A '];//output a

3, there is a more troublesome, is to set the object {Name:key,value:val}, the object is stored multiple times, transform key and Val to get the corresponding data, traversing the name key for the desired value when the Val;

JS implementation of dynamic key value (JSON string considerations: Key and Value are double quotes, the official website is specified in double quotation marks)