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How can I create a copy of an object in Python?
...
193
To get a fully independent copy of an object you can use the copy.deepcopy() function.
For more...
ANTLR: Is there a simple example?
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453
Note: this answer is for ANTLR3! If you're looking for an ANTLR4 example, then this Q&A demo...
How to match all occurrences of a regex
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834
Using scan should do the trick:
string.scan(/regex/)
...
Removing viewcontrollers from navigation stack
...ave a navigation stack, with say 5 UIViewControllers. I want to remove the 3rd and 4th viewcontrollers in the stack on the click of a button in the 5th viewcontroller. Is it possible to do this? If so how?
...
程序员之网络安全系列（二）：如何安全保存用户密码及哈希算法 - 更多技术 ...
...码试一下上面的第二点 （MD5是一种常用的Hash算法)
2.2.3 :003 > require 'digest/md5.so'
=> true
2.2.3 :004 > puts Digest::MD5.hexdigest('I love you')
e4f58a805a6e1fd0f6bef58c86f9ceb3
=> nil
2.2.3 :005 > puts Digest::MD5.hexdigest('I love you!')
690a8cda8894e37a6fff4d1790d53b...
How to undo 'git reset'?
... reset HEAD~ and want to undo it. My reflog looks like this:
$ git reflog
3f6db14 HEAD@{0}: HEAD~: updating HEAD
d27924e HEAD@{1}: checkout: moving from d27924e0fe16776f0d0f1ee2933a0334a4787b4c
[...]
The first line says that HEAD 0 positions ago (in other words, the current position) is 3f6db14; ...
How to select html nodes by ID with jquery when the id contains a dot?
...esktop browsers support it.
The same method does seem to work in jQuery 1.3.2, though I haven't tested it thoroughly; quickExpr doesn't pick it up, but the more involved selector parser seems to get it right:
$('#SearchBag\\.CompanyName');
...
How to use jQuery in chrome extension?
...e this :
"background":
{
"scripts": ["thirdParty/jquery-2.0.3.js", "background.js"]
}
If you need jquery in a content_scripts, you have to add it in the manifest too:
"content_scripts":
[
{
"matches":["http://website*"],
"js":["thirdParty/jq...
What does the ^ operator do in Java?
... (binary)
5 = 101
6 = 110
------------------ xor
3 = 011
This the truth table for bitwise (JLS 15.22.1) and logical (JLS 15.22.2) xor:
^ | 0 1 ^ | F T
--+----- --+-----
0 | 0 1 F | F T
1 | 1 0 T | T F
More simply, you can also think of xor as "t...