大约有 30,000 项符合查询结果（耗时：0.0440秒） [XML]
Is git's semi-secret empty tree object reliable, and why is there not a symbolic name for it?
... 'Initial commit'
Will give you:
(See the tree SHA1?)
You can even rebase your existing history on top of that empty commit (see "git: how to insert a commit as the first, shifting all the others?")
In both cases, you don't rely on the exact SHA1 value of that empty tree.
You simply follow a ...
UUID max character length
... you want to accept them, and 2) what the max length of those IDs might be based on whatever API is used to generate them.
share
|
improve this answer
|
follow
...
performSelector may cause a leak because its selector is unknown
...uments these methods as "inherently unsafe"
The idea of sending messages based on a named selector is not, however, an "inherently unsafe" feature. This idea has been used successfully for a long time in Objective-C as well as many other programming languages.
1 All Objective-C methods have two...
What are the best Haskell libraries to operationalize a program? [closed]
... tools and libraries you might want to consider:
QuickCheck for property based testing
hlint as an extended version of -Wall
Those are both targeted at code quality.
As a coding practice, avoid Lazy IO. If you need streaming IO, then go with one of the iteratee libraries such as enumerator. I...
Find the nth occurrence of substring in a string
...e most prominent approaches presented so far, namely @bobince's findnth() (based on str.split()) vs. @tgamblin's or @Mark Byers' find_nth() (based on str.find()). I will also compare with a C extension (_find_nth.so) to see how fast we can go. Here is find_nth.py:
def findnth(haystack, needle, n):...
JavaScript: What are .extend and .prototype used for?
...
Javascript's inheritance is prototype based, so you extend the prototypes of objects such as Date, Math, and even your own custom ones.
Date.prototype.lol = function() {
alert('hi');
};
( new Date ).lol() // alert message
In the snippet above, I define a met...
Get Root Directory Path of a PHP project
... when you have two levels of directories. Right? I mean, when call it from base_project_directory/folder1/folder2/folder3/file.php it doesn't return the base_project_directory.
– Ali Khalili
Apr 12 '19 at 15:03
...
This type of CollectionView does not support changes to its SourceCollection from a thread different
...
public AsyncObservableCollection(IEnumerable<T> list)
: base(list)
{
}
protected override void OnCollectionChanged(NotifyCollectionChangedEventArgs e)
{
if (SynchronizationContext.Current == _synchronizationContext)
{
// Execute the Col...
Regex lookahead, lookbehind and atomic groups
...s. They check for a regex (towards right or left of the current position - based on ahead or behind), succeeds or fails when a match is found (based on if it is positive or negative) and discards the matched portion. They don't consume any character - the matching for regex following them (if any), ...
How to change navbar collapse threshold using Twitter bootstrap-responsive?
... will still apply to the other elements in your document.
Here is a short demo with a media query set to drop at 550px as you require:
http://jsfiddle.net/wU8MW/
Note: I placed the above modified @media queries way down below the css frame as the new modified css is supposed to be loaded first tha...