Is it possible to turn this:
var a = "[0,0,1,1,0,0,1,[1,0,2]]";
into an array so it will work with this?
var newArray = a; // now newArray is [0,0,1,1,0,0,1,[1,0,2]], not "[0,0,1,1,0,0,1,[1,0,2]]"
5 Answers
var a = "[0,0,1,1,0,0,1,[1,0,2]]";
var result = JSON.parse( a );
1 Comment
MasterPtato
Oh ok, that works. But i have an array with a variable name in it, a, and the parse doesn't work with strings or variables, does it?
var newArray = JSON.parse(a)
That will convert from string to array.
Comments
In addition to JSON.parse you could use eval:
var a = "[0,0,1,1,0,0,1,[1,0,2]]";
var newArray = eval(a);
As for a discussion on whether to use JSON.parse or eval, see this SO discussion: JSON.parse vs. eval()
8 Comments
Scott Marcus
There is no discussion. Never use
eval();
Mike Cluck
@ScottMarcus Never is such a strong word. It should be an absolute last resort and can be useful when creating a service like JSFiddle or some other kind of code playground. But it's almost always the wrong solution.
Scott Marcus
@MikeC I don't believe there is any use case that requires
eval(). Most often it requires rethinking the problem. I'll stand by never.Mike Cluck
@ScottMarcus Again, if you're building an app with the intent of letting the user run custom Javascript then it's the right tool for the job. You don't gain anything by writing your own JS interpreter.
Scott Marcus
@Mike C I would not use eval() even in that situation. There are always other options besides eval().
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Yes, it is possible, these browsers support JSON.parse(), which will parse a given String and converts it into an object, if the given string is a valid JSON representation.
Comments
Also you can do:
var result = eval("[0,0,1,1,0,0,1,[1,0,2]]");
You result will be:
[0, 0, 1, 1, 0, 0, 1, Array[3]]
JSON.parse()?JSON.parse(a)