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In Python one can get a dictionary of all local and global variables in the current scope with the built-in functions locals() and globals(). Is there some equivalent way of doing this in Javascript? For instance, I would like to do something like the following:
var foo = function(){ alert('foo'); }; var bar = function(){ alert('bar'); }; var s = 'foo'; locals()[s](); // alerts 'foo' Is this at all possible, or should I just be using a local object for the lookup?
919
Python | locals() function Python locals() function returns the dictionary of the current local symbol table. Symbol table: It is a data structure created by a compiler for which is used to store all information needed to execute a program.
globals() always returns the dictionary of the module namespace. locals() always returns a dictionary of the current namespace. vars() returns either a dictionary of the current namespace (if called with no argument) or the dictionary of the argument.
The closest equivalent in all cases of what is passed to list() would be using the spread syntax from ES6. For older versions of JavaScript, you can use string. split('') for a character array.
locals() - No.
globals() - Yes.
window is a reference to the global scope, like globals() in python.
globals()["foo"] is the same as:
window["foo"] Well, I don't think that there is something like that in js. You can always use eval instead of locals(). Like this:
eval(s+"()"); You just have to know that actually function foo exists.
Edit:
Don't use eval:) Use:
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