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Drag and drop files into WPF
... to do.
private void ImagePanel_Drop(object sender, DragEventArgs e)
{
if (e.Data.GetDataPresent(DataFormats.FileDrop))
{
// Note that you can have more than one file.
string[] files = (string[])e.Data.GetData(DataFormats.FileDrop);
// Assuming you have one file that you care abou...
How can I view an old version of a file with Git?
... tag name, a branch name, a relative commit name, or any other way of identifying a commit in Git)
For example, to view the version of file <repository-root>/src/main.c from 4 commits ago, use:
$ git show HEAD~4:src/main.c
Git for Windows requires forward slashes even in paths relative to ...
Why does the C++ map type argument require an empty constructor when using []?
...ns a reference to the object
that is associated with a particular
key. If the map does not already
contain such an object, operator[]
inserts the default object
data_type().
If you don't have default constructor you can use insert/find functions.
Following example works fine:
myMap.inse...
Case insensitive regular expression without re.compile?
... @Abhijeet You really shouldn't use try/except in that case. Just check if any of the strings are None first.
– erb
Oct 21 '19 at 5:56
...
get keys of json-object in JavaScript [duplicate]
...ay initializer and an object initializer (aka, "object literal syntax").]
If you can rely on having ECMAScript5 features available, you can use the Object.keys function to get an array of the keys (property names) in an object. All modern browsers have Object.keys (including IE9+).
Object.keys(jso...
UTF-8: General? Bin? Unicode?
...general_ci is faster than utf8_unicode_ci, but less correct.
Here is the difference:
For any Unicode character set, operations performed using the _general_ci collation are faster than those for the _unicode_ci collation. For example, comparisons for the utf8_general_ci collation are faster, b...
Replace string within file contents
... "giving out answers to homework problems" is an extremely stupid comment. If someone wants help then help them. Not everyone is looking to do their HW, some actually want to learn something ...
– KingMak
Jan 4 '14 at 0:26
...
OnNotify函数 ON_NOTIFY消息总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
OnNotify函数 ON_NOTIFY消息总结函数CWnd::OnNotify处理通知消息。其默认实现是检查通知消息处理函数的消息映射，然后调用。(checks the message map for notificatio...函数CWnd::OnNotify处理通知消息。其默认实现是检查通知消息处理函数的消息...
How to dynamically compose an OR query filter in Django?
...
How can you compose raw queries with Django if you want to add optional conditions like above?
– user
Jul 13 '14 at 18:34
...
Remove all subviews?
... situation is muddled up by the fact that NSView and UIView handle things differently. For NSView (desktop Mac development only), you can simply use the following:
[someNSView setSubviews:[NSArray array]];
For UIView (iOS development only), you can safely use makeObjectsPerformSelector: because t...