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Is there any difference between “foo is None” and “foo == None”?
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edited Mar 3 '17 at 14:56
answered Aug 25 '08 at 18:38
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Git: Remove committed file after push
...t, no force needed:
git push
get back to your unfinished work, again do (3 times arrow up):
git checkout HEAD^ -- /path/to/file
effectively 'uncommitting':
To modify the last commit of the repository HEAD, obfuscating your accidentally pushed work, while potentially running into a conflict wi...
How do I join two lines in vi?
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311
Shift+J removes the line change character from the current line, so by pressing "J" at any pla...
How to do parallel programming in Python?
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answered Dec 12 '13 at 16:39
Matt WilliamsonMatt Williamson
32.1k1010 gold badges5757 silver badges6969 bronze badges
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How do I replace the *first instance* of a string in .NET?
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135
string ReplaceFirst(string text, string search, string replace)
{
int pos = text.IndexOf(sear...
What is the difference between 'typedef' and 'using' in C++11?
...s be used in contexts which allows initialization statements
// C++11 (C++03) (init. statement in for loop iteration statements).
for(typedef int Foo; Foo{} != 0;) {}
// C++17 (if and switch initialization statements).
if (typedef int Foo; true) { (void)Foo{}; }
// ^^^^^^^^^^^^^^^ init-statement
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How to find the files that are created in the last hour in unix
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edited Nov 16 '16 at 4:38
seanf
5,62822 gold badges3939 silver badges4949 bronze badges
answered Jul ...
kill -3 to get java thread dump
I am using kill -3 command to see the JVM's thread dump in unix. But where can I find the output of this kill command? I am lost!!
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Check if a path represents a file or a folder
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edited Oct 13 '16 at 9:09
answered Oct 8 '12 at 11:07
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Time complexity of Euclid's Algorithm
...drop below 1. The total number of steps (S) until we hit 0 must satisfy (4/3)^S <= A+B. Now just work it:
(4/3)^S <= A+B
S <= lg[4/3](A+B)
S is O(lg[4/3](A+B))
S is O(lg(A+B))
S is O(lg(A*B)) //because A*B asymptotically greater than A+B
S is O(lg(A)+lg(B))
//Input size N is lg(A) + lg(B)
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