大约有 44,000 项符合查询结果（耗时：0.0713秒） [XML]
What is a good Hash Function?
...is the best I've ever used.
http://www.azillionmonkeys.com/qed/hash.html
If you care about cryptographically secure or anything else more advanced, then YMMV. If you just want a kick ass general purpose hash function for a hash table lookup, then this is what you're looking for.
...
ssh “permissions are too open” error
...
Keys need to be only readable by you:
chmod 400 ~/.ssh/id_rsa
If Keys need to be read-writable by you:
chmod 600 ~/.ssh/id_rsa
600 appears to be fine as well (in fact better in most cases, because you don't need to change file permissions later to edit it).
The relevant portion from...
What is the easiest/best/most correct way to iterate through the characters of a string in Java?
... plus one for placing the s.length() in the initialization expression. If anyone doesn't know why, it's because that is only evaluated once where if it was placed in the termination statement as i < s.length(), then s.length() would be called each time it looped.
– Denni...
Spring MVC type conversion : PropertyEditor or Converter?
...g for the easiest and simplest way to bind and convert data in Spring MVC. If possible, without doing any xml configuration.
...
Git submodule add: “a git directory is found locally” issue
....
This is what ultimately worked for me (this article helped out a lot):
If you haven't already run git rm --cached path_to_submodule (no trailing slash) as well as rm -rf path_to_submodule, do that!
Then:
Delete the relevant lines from the .gitmodules file. e.g. delete these:
[submodule "path...
What is the best way to convert seconds into (Hour:Minutes:Seconds:Milliseconds) time?
...at we want in output
string str = time .ToString(@"hh\:mm\:ss\:fff");
or if you want date time format then you can also do this
TimeSpan time = TimeSpan.FromSeconds(seconds);
DateTime dateTime = DateTime.Today.Add(time);
string displayTime = dateTime.ToString("hh:mm:tt");
For more you can check...
Android - Back button in the title bar
...
(In the Android developers API, it recommends messing around with the manifest and adding stuff like android:parentActivityName. But that doesn't seem to work for me. The above is simpler and more reliable.)
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="...
NPM clean modules
... under node_modules? Something like npm rebuild that removes all build artifacts but doesn't rebuild them?
8 Answers
...
C++ unordered_map using a custom class type as the key
...by overloading operator==() for your key type (as you did already).
The difficulty with the hash function is that if your key type consists of several members, you will usually have the hash function calculate hash values for the individual members, and then somehow combine them into one hash valu...
ExpandableListView - hide indicator for groups with no children
...upIndicator property takes a state enabled drawable. That is, you can set different image for different states.
When the group has no children, the corresponding state is 'state_empty'
See these reference links:
this and this
For state_empty, you can set a different image which is not confusing,...