大约有 45,000 项符合查询结果（耗时：0.0551秒） [XML]
lexers vs parsers
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483
What parsers and lexers have in common:
They read symbols of some alphabet from their input.
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How to prevent vim from creating (and leaving) temporary files?
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user55400user55400
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What is a non-capturing group in regular expressions?
...ow.com/"
Group 1: "http"
Group 2: "stackoverflow.com"
Group 3: "/"
Match "https://stackoverflow.com/questions/tagged/regex"
Group 1: "https"
Group 2: "stackoverflow.com"
Group 3: "/questions/tagged/regex"
But I don't care about the protocol -- I just want the host an...
How to prevent multiple instances of an Activity when it is launched with different Intents
...ork around for market launches. See https://issuetracker.google.com/issues/36907463
// for more details. Essentially, the market launches the main activity on top of other activities.
// we never want this to happen. Instead, we check if we are the root and if not, we finish.
if (!isTaskRoot()) {
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Returning the product of a list
...rt numpy as np
import numexpr as ne
# from functools import reduce # python3 compatibility
a = range(1, 101)
%timeit reduce(lambda x, y: x * y, a) # (1)
%timeit reduce(mul, a) # (2)
%timeit np.prod(a) # (3)
%timeit ne.evaluate("prod(a)") # (4)
In t...
C/C++头文件string与string.h的区别及Mac平台的特殊性 - C/C++ - 清泛网 - ...
C/C++头文件string与string.h的区别及Mac平台的特殊性c_string_hstrlen() 等函数需要string h头文件，不过MacOS下clang编译器比较特殊，必须string，可以用宏区分Mac平台。string.h（C语言头文件，提供字符数组相关C函数）
string.h是C语言里面...
How do I find out my python path using python?
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Mark RansomMark Ransom
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How to close IPython Notebook properly?
...yet.
(For future readers, this is the situation with 0.12 released and 0.13 in development.)
Update December 2017
The IPython Notebook has become the Jupyter Notebook. A recent version has added a jupyter notebook stop shell command which will shut down a server running on that system. You can pa...
Find out whether Chrome console is open
... will become true if/when the console is opened
console.profiles (2013)
Update: console.profiles has been removed from Chrome. This solution no longer works.
Thanks to Paul Irish for pointing out this solution from Discover DevTools, using the profiler:
function isInspectOpen() {
console...