大约有 13,700 项符合查询结果（耗时：0.0409秒） [XML]
Guaranteed lifetime of temporary in C++?
... a "full-expression" in this case: printf("%s", strdup(std::string("$$$").c_str()) ); ?I mean if strdup(std::string("$$$").c_str()) is taken as the full expression, then the pointer that strdup sees is valid. If std::string("$$$").c_str() is a full expression, then the pointer that strdup sees is in...
In Python, what is the difference between “.append()” and “+= []”?
...Comparing bytecodes we can assume that append version wastes cycles in LOAD_ATTR + CALL_FUNCTION, and += version -- in BUILD_LIST. Apparently BUILD_LIST outweighs LOAD_ATTR + CALL_FUNCTION.
>>> import dis
>>> dis.dis(compile("s = []; s.append('spam')", '', 'exec'))
1 ...
Are there any JavaScript static analysis tools? [closed]
...ncreasing the warning level by invoking Closure with an option of --warning_level VERBOSE
PHP CodeSniffer can parse JavaScript as well as PHP and CSS. CodeSniffer ships with several different coding standards, (say phpcs -i to see them) which include many useful sniffs for JavaScript code includin...
Correct way to write line to file?
...
This should be as simple as:
with open('somefile.txt', 'a') as the_file:
the_file.write('Hello\n')
From The Documentation:
Do not use os.linesep as a line terminator when writing files opened in text mode (the default); use a single '\n' instead, on all platforms.
Some useful re...
How to enable cross-origin resource sharing (CORS) in the express.js framework on node.js
...});
app.configure('development', function () {
app.use(express.static(__dirname + '/public'));
app.use(express.errorHandler({ dumpExceptions: true, showStack: true }));
});
app.configure('production', function () {
app.use(express.static(__dirname + '/public'));
app.use(express.err...
How to sort an array by a date property
...(a.date);
});
More Generic Answer
array.sort(function(o1,o2){
if (sort_o1_before_o2) return -1;
else if(sort_o1_after_o2) return 1;
else return 0;
});
Or more tersely:
array.sort(function(o1,o2){
return sort_o1_before_o2 ? -1 : sort_o1_after_o2 ? 1 : 0;
});
...
Constructor initialization-list evaluation order
...ped aborting. This is an example of the syntax I'm using. The thing is, a_ needs to be initialized before b_ in this case. Can you guarantee the order of construction?
...
Where is Maven' settings.xml located on mac os?
...8:00)
Maven home: /usr/local/Cellar/maven/3.5.0/libexec
Java version: 1.8.0_121, vendor: Oracle Corporation
Java home: /Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home/jre
Default locale: zh_CN, platform encoding: UTF-8
OS name: "mac os x", version: "10.11.5", arch: "x86_64", family:...
How to reference a file for variables using Bash?
...source
For example:
config.sh
#!/usr/bin/env bash
production="liveschool_joe"
playschool="playschool_joe"
echo $playschool
script.sh
#!/usr/bin/env bash
source config.sh
echo $production
Note that the output from sh ./script.sh in this example is:
~$ sh ./script.sh
playschool_joe
livescho...
How can I change the copyright template in Xcode 4?
...
__MyCompanyName__ being ugly (or if you aren't coding for the company set up in your profile), let's change it.
Click on your project root in the Project Navigator on the left
Enable your Utilities view on the right while t...