The fact that the local variable (and function parameter) age happens to have the same name as a variable somewhere else in your program is irrelevant. The whole point of local variables is that they only live within the local scope of the function they’re defined in. The fact that the local variable has the … Read more
When the function terminates, the following steps happen: The function’s return value is copied into the placeholder that was put on the stack for this purpose. Everything after the stack frame pointer is popped off. This destroys all local variables and arguments. The return value is popped off the stack and is assigned as the … Read more
You redeclare gsd as a new variable inside your function. Remove var in front of gsd inside the function to address the gsd in the outer scope.
The scope is as you would expect. The perhaps surprising thing is that the default value is only calculated once and reused, so each time you call the function you get the same list, not a new list initialized to []. The list is stored in f.__defaults__ (or f.func_defaults in Python 2.) def f(a, L=[]): … Read more
In Python, scoping is of three types : global, local and class. You can create specialized ‘scope’ dictionaries to pass to exec / eval(). In addition you can use nested scopes (defining a function within another). I found these to be sufficient in all my code. As Douglas Leeder said already, the main reason to … Read more
You can always access it just by storing your viewmodel in a variable you can access, the module and revealing module patterns are nice, but you can just store it in an object that won’t conflict with other names (‘my’ here): my = { viewModel: new EmployeeViewModel() }; ko.applyBindings(my.viewModel); You had the right idea, you … Read more
You’re mixing up class and instance attributes. print self._haircolor
the ondir program lets you specify actions to run when you enter and leave directories in a terminal
you can use the “use strict” to contain the eval’ed code within the eval itself. Second, eval of strict mode code does not introduce new variables into the surrounding scope. In normal code eval(“var x;”) introduces a variable x into the surrounding function or the global scope. This means that, in general, in a function … Read more
Since no one has mentioned it yet there is a quick and dirty solution: var decimal = eval(fraction); Which has the perks of correctly evaluating all sorts of mathematical strings. eval(“3/2”) // 1.5 eval(“6”) // 6 eval(“6.5/.5”) // 13, works with decimals (floats) eval(“12 + 3”) // 15, you can add subtract and multiply too … Read more