大约有 42,000 项符合查询结果（耗时：0.0623秒） [XML]
What is the difference between “#!/usr/bin/env bash” and “#!/usr/bin/bash”?
...fferent systems. As long as it's in your path, it will find it.
One downside is that you will be unable to pass more than one argument (e.g. you will be unable to write /usr/bin/env awk -f) if you wish to support Linux, as POSIX is vague on how the line is to be interpreted, and Linux interprets e...
Meaning of acronym SSO in the context of std::string
...ple, the actual size varies), it stores it directly in that array. This avoids the need to call new at all, which speeds things up a bit.
EDIT:
I wasn't expecting this answer to be quite so popular, but since it is, let me give a more realistic implementation, with the caveat that I've never actua...
Why are C# 4 optional parameters defined on interface not enforced on implementing class?
...face as you describe, and a hundred classes that implement it. Then you decide to make one of the parameters of one of the interface's methods optional. Are you suggesting that the right thing to do is for the compiler to force the developer to find every implementation of that interface method, and...
How serious is this new ASP.NET security vulnerability and how can I workaround it?
...otect your sites with a custom URLScan rule.
Basically make sure you provide a custom error page so that an attacker is not exposed to internal .Net errors, which you always should anyways in release/production mode.
Additionally add a random time sleep in the error page to prevent the attacker f...
Xcode 4, Core Data Model Version - Set Current Version
...
Click on the top level .xcdatamodelId file (the one that has the many versions of .xcdatamodel under it as children).
Make sure the Utilities sidepane is visible (if not click on the third "View" button at the top right of the window).
In the Utilities sidepan...
How to concatenate twice with the C preprocessor and expand a macro as in “arg ## _ ## MACRO”?
...TOR(x,y) PASTER(x,y)
#define NAME(fun) EVALUATOR(fun, VARIABLE)
extern void NAME(mine)(char *x);
$ gcc -E xx.c
# 1 "xx.c"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "xx.c"
extern void mine_3(char *x);
$
Two levels of indirection
In a comment to another answer, Cade Roux asked wh...
prototype based vs. class based inheritance
...gy issues here, mostly built around someone (not you) trying to make their idea sound like The Best.
All object oriented languages need to be able to deal with several concepts:
encapsulation of data along with associated operations on the data, variously known as data members and member function...
Assign pandas dataframe column dtypes
...he entire field is converted to float64
– Michael David Watson
May 5 '15 at 20:13
18
I noticed co...
Is it bad practice to have a constructor function return a Promise?
...uctor for a blogging platform and it has many async operations going on inside. These range from grabbing the posts from directories, parsing them, sending them through template engines, etc.
...
Is it possible to have a Subversion repository as a Git submodule?
...submodules in the same repository. The clone that uses git-svn is only a bridge to creating a native git clone of the svn repository.
– richq
Dec 22 '10 at 9:58
...