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Why is it important to override GetHashCode when Equals method is overridden?
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Yes, it is important if your item will be used as a key in a dictionary, or HashSet<T>, etc - since this is used (in the absence of a custom IEqualityComparer<T>) to group items into buckets. If the hash-code for two items does not ma...
Why do you need to put #!/bin/bash at the beginning of a script file?
...helps some editors like Vim determine the language for syntax highlighting if the file doesn't have an extension. Without the shebang, Vim will display a bash script the same as plain text file.
– Aaron Blenkush
Dec 10 '13 at 21:16
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Max return value if empty query
... .Select(x => x.ShoeSize)
.DefaultIfEmpty(0)
.Max();
The zero in DefaultIfEmpty is not necessary.
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How do I size a UITextView to its content?
..., fixedWidth), newSize.height);
textView.frame = newFrame;
}
Or in Swift (Works with Swift 4.1 in iOS 11)
let fixedWidth = textView.frame.size.width
let newSize = textView.sizeThatFits(CGSize(width: fixedWidth, height: CGFloat.greatestFiniteMagnitude))
textView.frame.size = CGSize(width: max(...
Location Services not working in iOS 8
...my Info.plist. I added it and still it does not seem to work. I am using Swift, iOS8 and XCode 6 beta 4
– A B Vijay Kumar
Aug 3 '14 at 4:06
4
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Disable assertions in Python
...tive functionality)
Single point in code
You continue your question:
if an assertion fails, I don't want it to throw an AssertionError, but to keep going.
If you want the code that fails to be exercised, you can catch either ensure control flow does not reach the assertion, for example:
if ...
MFC CListCtrl使用方法详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...tr;
for(int i=0; i<m_list.GetItemCount(); i++)
{
if( m_list.GetItemState(i, LVIS_SELECTED) == LVIS_SELECTED || m_list.GetCheck(i))
{
str.Format(_T("第%d行的checkbox为选中状态"), i);
AfxMessageBox(str);
}
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How to get everything after a certain character?
...'d like to get the rest of the string after the underscore. So for example if I have the following strings and what I'd like returned:
...
Transferring files over SSH [closed]
...'re saying secure copy ./styles/, but not where to copy it to.
Generally, if you want to download, it will go:
# download: remote -> local
scp user@remote_host:remote_file local_file
where local_file might actually be a directory to put the file you're copying in. To upload, it's the opposit...
How to play audio?
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If you don't want to mess with HTML elements:
var audio = new Audio('audio_file.mp3');
audio.play();
function play() {
var audio = new Audio('https://interactive-examples.mdn.mozilla.net/media/examples/t-rex-roar.mp...