大约有 45,000 项符合查询结果（耗时：0.0271秒） [XML]
Conditional import of modules in Python
...mport simplejson as json as it is likely a newer (faster) version of the standard json module.
– Seppo Erviälä
Oct 20 '12 at 17:07
...
Ternary operator (?:) in Bash
...
why the [[ and ]] ? it works just as well like this : [ $b = 5 ] && a="$c" || a="$d"
– kdubs
Oct 29 '14 at 14:57
...
Find full path of the Python interpreter?
... @JohnFreeman: I tried this on a GNU/Linux box w/ GNU coreutils 8.4 (env) and Python 3.4.2. #!/usr/bin/env python3 will return the correct full binary path via sys.executable. Perhaps your OS or Python version behaves slightly differently.
– kevinarpe
May 22...
What does Java option -Xmx stand for? [duplicate]
...B. The upper limit for this value will be approximately 4000m on Solaris 7 and Solaris 8 SPARC platforms and 2000m on Solaris 2.6 and x86 platforms, minus overhead amounts. Examples:
-Xmx83886080
-Xmx81920k
-Xmx80m
So, in simple words, you are setting Java heap m...
How do I check OS with a preprocessor directive?
...them, with links to where they're found:
Windows
_WIN32 Both 32 bit and 64 bit
_WIN64 64 bit only
Unix (Linux, *BSD, Mac OS X)
See this related question on some of the pitfalls of using this check.
unix
__unix
__unix__
Mac OS X
__APPLE__
__MACH__
Both are defined; checking for eith...
How do I convert a double into a string in C++?
...y:
std::string str = boost::lexical_cast<std::string>(dbl);
The Standard C++ way:
std::ostringstream strs;
strs << dbl;
std::string str = strs.str();
Note: Don't forget #include <sstream>
share
...
What is the combinatory logic equivalent of intuitionistic type theory?
I recently completed a university course which featured Haskell and Agda (a dependent typed functional programming language), and was wondering if it was possible to replace lambda calculus in these with combinatory logic. With Haskell this seems possible using the S and K combinators, thus making i...
Python vs Bash - In which kind of tasks each one outruns the other performance-wise? [closed]
...anguages in their own right while being optimized to efficiently pass data and control to and from other executing processes written in any language the O/S supports.
Most Linux applications, regardless what language the bulk of the program is written in, depend on shell scripts and Bash has become...
Can you Run Xcode in Linux?
...Xcode (the gcc compiler family, the gdb debugger, etc.) is all open source and common to Unix and Linux platforms. But the IDE--the editor, project management, indexing, navigation, build system, graphical debugger, visual data modeling, SCM system, refactoring, project snapshots, etc.--is a Mac OS...
To ARC or not to ARC? What are the pros and cons? [closed]
...ge collection. It has no GC runtime overhead. The compiler inserts retains and releases in all the places you should have anyway. But it's smarter than you and can optimize out the ones that aren't actually needed (just like it can unroll loops, eliminate temporary variables, inline functions, etc.)...