I try to change a string into an object using eval but failed.
var obj ="{a:0, b:-1}";
eval(obj);
Error msg says "invalid label" but even this doesn't work
var obj="{'a':'0', 'b':'-1'}";
What's wrong with the code?
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2 Answers
when evaling json, you have to put braces around it, so it should look like (otherwise it's not a complete javascript-statement):
eval('('+obj+')');
this solved the error, but the generated object isn't saved to any variable - so you might want to end up with something else, like:
eval('obj = '+obj);
this also makes a complete statement and, in addition, obj now is a "real" object.
2 Comments
NSF
That's interesting...Actually I didn't use brackets previously but instead put string into a literal array so it's something like: obj = eval("[string]"); and it worked. So I didn't notice that issue. Thanks. I'll try it now.
newacct
why do the
obj = inside the eval? eval returns the result; simply assign that: obj = eval('('+obj+')'); Do as little with eval as possibleyou can try something like this too.
var obj=eval(" [{'a':'0', 'b':'-1'}] ");
alert(obj);
