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Loop code for each file in a directory [duplicate]
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Is the $files variable used to avoid calling scandir() more than once in the foreach loop? Or can I embed it directly without any side effects?
– Zero3
May 10 '15 at 15:57
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Why is reading lines from stdin much slower in C++ than Python?
...tl;dr: Because of different default settings in C++ requiring more system calls.
By default, cin is synchronized with stdio, which causes it to avoid any input buffering. If you add this to the top of your main, you should see much better performance:
std::ios_base::sync_with_stdio(false);
Normall...
c++ boost::multi_index composite keys efficiency - c++1y / stl - 清泛IT社区，为创新赋能！
...ey and thus is slower?For example, if I was to maintain two containers manually using two different indices and wanted to find items that matched a specific 2-part query I would probably filter the first container for all items matching the 1st part of the query, and then filter the result for items...
Interfaces vs. abstract classes [duplicate]
...o functions
Have slightly more control in how the "interface" methods are called
Ability to provide behavior related or unrelated to the interface for "free"
Interfaces are merely data passing contracts and do not have these features. However, they are typically more flexible as a type can only be...
Is an array an object in java
...In the Java programming language, arrays are objects (§4.3.1), are dynamically created, and may be assigned to variables of type Object (§4.3.2). All methods of class Object may be invoked on an array.
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Run Java Code Online [closed]
codepad.org allow you to run C,C++,D etc code online but not Java... is there a site that I can use for Java?
9 Answers
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Ruby : How to write a gem? [closed]
...r Ruby and make it available as a gem.
What are the tools, steps and pitfalls ?
Are there any good tutorials, screencasts, etc., which helped you learning how to do it ?
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php implode (101) with quotes
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This has the added benefit of allowing you to escape any single quotes which may appear in the array elements
– user229044♦
May 24 '11 at 18:17
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is it possible to `git status` only modified files?
...u can't do this with git status, but you could use git ls-files -m to show all modified files.
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eval command in Bash and its typical uses
...de the parentheses in a subshell (i.e. in a separate process that inherits all settings such as variable values from the current shell), and gathers its output. So echo $($n) runs $n as a shell command, and displays its output. Since $n evaluates to 1, $($n) attempts to run the command 1, which does...