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Difference between Destroy and Delete
...ased on the :dependent option passed into the association. However, during testing, I found the following side effect where callbacks were only ran for delete and not delete_all
dependent: :destroy Example:
class Parent < ApplicationRecord
has_many :children,
before_remove: -> (_) {...
“From View Controller” disappears using UIViewControllerContextTransitioning
...
wow. That did it! I tested without modalPresentationStyle in iOS7 & 8 and it works find in both. Thanks!!
– Ah Ryun Moon
Sep 9 '14 at 23:26
...
How do I find the most recent git commit that modified a file?
... relative path names with wildcards, for ex:
git rev-list origin/user/bob/testbranch -1 src/bfiles/*.txt
...Which would tell you what the most recent change was to the wildcard match in that branch's history. The options for rev-list are extreme, it is one of the most important plumbing commands,...
PDO MySQL: Use PDO::ATTR_EMULATE_PREPARES or not?
...for pdo_mysql module. Maybe there are much more bugs, I don't know. Also I tested on fresh 64bit debian jessie, all listed bugs occur when I apt-get install php5-mysql, and disappear when I apt-get install php5-mysqlnd.
When PDO::ATTR_EMULATE_PREPARES is set to true (as default) - these bugs don't ...
What does the restrict keyword mean in C++?
...oth are the same.
With -O3:
with restrict:
3f0: 48 85 d2 test %rdx,%rdx
3f3: 74 33 je 428 <fr+0x38>
3f5: 55 push %rbp
3f6: 53 push %rbx
3f7: 48 89 f5 mov %rsi,%rbp
3fa: be 04 00 ...
How can I push a local Git branch to a remote with a different name easily?
... branch name I've checked out. I might just want to git push buildserver .:test_this where the . shall be the local branch name which I don't necessarily know. I could look it up, sure, but if there was a short hand, like the dot, for that, it'd be cool.
– Frederick Nord
...
Compression/Decompression string with C#
...ould it ever change
using (var compressorStream = new DeflateStream(compressedStream, CompressionLevel.Fastest, true))
{
uncompressedStream.CopyTo(compressorStream);
}
// call compressedStream.ToArray() after the en...
Submitting HTML form using Jquery AJAX
... $.post documentation.
Example: Send form data using ajax requests
$.post("test.php", $("#testform").serialize());
Example: Post a form using ajax and put results in a div
<!DOCTYPE html>
<html>
<head>
<script src="http://code.jquery.com/jquery-1.9.1.js"></scr...
When should I use GC.SuppressFinalize()?
...d a finalizer to debug builds of their own IDisposable classes in order to test that code has disposed their IDisposable object properly.
public void Dispose() // Implement IDisposable
{
Dispose(true);
#if DEBUG
GC.SuppressFinalize(this);
#endif
}
#if DEBUG
~MyClass() // the finalizer
{
...
How many bytes does one Unicode character take?
...field will be silently truncated. Use "utf8mb4" instead.
There's a snowman test page (unicodesnowmanforyou.com).
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