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Don't understand why UnboundLocalError occurs (closure) [duplicate]
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Python doesn't have variable declarations, so it has to figure out the scope of variables itself. It does so by a simple rule: If there is an assignment to a variable inside a function, that variable is considered local.[1] Thus, the line
counter += 1
implicitly ma...
What happens to a github student account's repositories at the end of 2 years?
I just got upgraded to a free github micro plan using my university email address. I'm planning to use the private repositories for some class projects this semester, but I'm wondering what will happen to those repositories at the end of 2 years when my free student upgrade expires. I'm assuming it'...
How to concatenate two strings in C++?
...lo";
std::string greet = s + " World"; //concatenation easy!
Easy, isn't it?
Now if you need char const * for some reason, such as when you want to pass to some function, then you can do this:
some_c_api(s.c_str(), s.size());
assuming this function is declared as:
some_c_api(char const *inp...
How do I close a single buffer (out of many) in Vim?
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A word of caution: "the w in bw does not stand for write but for wipeout!"
More from manuals:
:bd
Unload buffer [N] (default: current
buffer) and delete it from
the buffer list. If the buffer was changed, this fails,
unless when [!]...
Difference between Control Template and DataTemplate in WPF
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Typically a control is rendered for its own sake, and doesn't reflect underlying data. For example, a Button wouldn't be bound to a business object - it's there purely so it can be clicked on. A ContentControl or ListBox, however, generally appear so that they ...
How to check if all list items have the same value and return it, or return an “otherValue” if they
If all the items in a list have the same value, then I need to use that value, otherwise I need to use an “otherValue”. I can’t think of a simple and clear way of doing this.
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Get Substring - everything before certain char
...lass Program
{
static void Main(string[] args)
{
Console.WriteLine("223232-1.jpg".GetUntilOrEmpty());
Console.WriteLine("443-2.jpg".GetUntilOrEmpty());
Console.WriteLine("34443553-5.jpg".GetUntilOrEmpty());
Console.ReadKey();
}
}
static class Helper
{
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Enabling markdown highlighting in Vim
I'm using Vim in a terminal on my MacBook Air with OS X Lion, and I can't seem to find a good plugin for Markdown syntax highlighting.
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How to scale down a range of numbers with a known min and max value
...to figure out how to take a range of numbers and scale the values down to fit a range. The reason for wanting to do this is that I am trying to draw ellipses in a java swing jpanel. I want the height and width of each ellipse to be in a range of say 1-30. I have methods that find the minimum and ...
How to make CSS3 rounded corners hide overflow in Chrome/Opera
I need round corners on a parent div to mask content from its childen. overflow: hidden works in simple situations, but breaks in webkit based browsers and Opera when the parent is positioned relatively or absolutely.
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