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Will using goto leak variables?
...swer pertains to C++ only; the rules are quite different in C.
Won't x be leaked?
No, absolutely not.
It is a myth that goto is some low-level construct that allows you to override C++'s built-in scoping mechanisms. (If anything, it's longjmp that may be prone to this.)
Consider the follow...
How to update a plot in matplotlib?
... the figure here. I allow the user to specify the units in the time scale (x-axis) and then I recalculate and call this function plots() . I want the plot to simply update, not append another plot to the figure.
...
What is the coolest thing you can do in
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.NET WPF Remember window size between sessions
...pe double
Left of type double
Height of type double
Width of type double
Maximized of type bool - to hold whether the window is maximized or not. If you want to store more information then a different type or structure will be needed.
Initialise the first two to 0 and the second two to the default...
Multiple variables in a 'with' statement?
...
It is possible in Python 3 since v3.1 and Python 2.7. The new with syntax supports multiple context managers:
with A() as a, B() as b, C() as c:
doSomething(a,b,c)
Unlike the contextlib.nested, this guarantees that a and b will have their __exit__()'s called even if C() or it's __enter__()...
Best way to make Java's modulus behave like it should with negative numbers?
...- a / b * b; i.e. it's the remainder.
You can do (a % b + b) % b
This expression works as the result of (a % b) is necessarily lower than b, no matter if a is positive or negative. Adding b takes care of the negative values of a, since (a % b) is a negative value between -b and 0, (a % b + b) is...
How do I spool to a CSV formatted file using SQLPLUS?
I want to extract some queries to a CSV output format. Unfortunately, I can't use any fancy SQL client or any language to do it. I must use SQLPLUS.
...
Resizing an image in an HTML5 canvas
...culates lanczos weight
function lanczosCreate(lobes) {
return function(x) {
if (x > lobes)
return 0;
x *= Math.PI;
if (Math.abs(x) < 1e-16)
return 1;
var xx = x / lobes;
return Math.sin(x) * Math.sin(xx) / x / xx;
};
}
//...
Moment.js: Date between dates
...
In versions 2.9+ there is an isBetween function, but it's exclusive:
var compareDate = moment("15/02/2013", "DD/MM/YYYY");
var startDate = moment("12/01/2013", "DD/MM/YYYY");
var endDate = moment("15/01/2013", "DD/MM/YYYY");
// omitting the optional third parameter, 'units'
c...
Forcing a WPF tooltip to stay on the screen
...adata(
typeof(DependencyObject), new FrameworkPropertyMetadata(Int32.MaxValue));
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