大约有 5,100 项符合查询结果（耗时：0.0155秒） [XML]
Which is more preferable to use: lambda functions or nested functions ('def')?
...n you tell me what this does:
str(reduce(lambda x,y:x+y,map(lambda x:x**x,range(1,1001))))[-10:]
I wrote it, and it took me a minute to figure it out. This is from Project Euler - i won't say which problem because i hate spoilers, but it runs in 0.124 seconds :)
...
how do i remove a comma off the end of a string?
...and corresponding ltrim for left trim) is very useful as you can specify a range of characters to remove, i.e. to remove commas and trailing whitespace you would write:
$string = rtrim($string, ", \t\n");
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Git Commit Messages: 50/72 Formatting
...or incorporating that data here but oh well… :-)
If you want to see the raw lengths:
cd /path/to/repo
git shortlog | grep -e '^ ' | sed 's/[[:space:]]\+\(.*\)$/\1/' | awk '{print length($0)}'
or a text-based histogram:
cd /path/to/repo
git shortlog | grep -e '^ ' | sed 's/[[:space...
传感器组件 · App Inventor 2 中文网
...
检测简单步数时(简单步数,距离)
当检测到原始步骤(raw step)时运行此事件。
检测行走步数时(行走步数,距离)
当检测到步行步骤(walking step)时触发此事件。步行步骤是看起来涉及向前运动的步骤。
方法
复位()
重置...
Performance of foreach, array_map with lambda and array_map with static function
...nt PHP version.
function lap($func) {
$t0 = microtime(1);
$numbers = range(0, 1000000);
$ret = $func($numbers);
$t1 = microtime(1);
return array($t1 - $t0, $ret);
}
function useForeach($numbers) {
$result = array();
foreach ($numbers as $number) {
$result[] = $number * 10;
...
Break a previous commit into multiple commits
... where <commit> is the commit you want to split. In fact, any commit range will do, as long as it contains that commit.
Mark the commit you want to split with the action "edit".
When it comes to editing that commit, execute git reset HEAD^. The effect is that the HEAD is rewound by one, and ...
Python loop counter in a for loop [duplicate]
...l sometimes do this:
def draw_menu(options, selected_index):
for i in range(len(options)):
if i == selected_index:
print " [*] %s" % options[i]
else:
print " [ ] %s" % options[i]
Though I tend to avoid this if it means I'll be saying options[i] more tha...
tinyxml XML解析库下载（tinyxml2.h 和 tinyxml2.cpp） - 源码下载 - 清泛...
...onality.
*/
class XMLUtil
{
public:
// Anything in the high order range of UTF-8 is assumed to not be whitespace. This isn't
// correct, but simple, and usually works.
static const char* SkipWhiteSpace( const char* p ) {
while( !IsUTF8Continuation(*p) && isspace( *reinter...
Why use AJAX when WebSockets is available?
...lelism, error handling, etc). Regarding performance, although from-scratch raw large file transfer speed would be similar, browsers have had years to finely tune caching of web content (much of which applies to AJAX requests) so in practice, switching from AJAX to WebSockets is unlikely to provide m...
What is the difference between a port and a socket?
...RL (although it can be).
In IP networking, port numbers can theoretically range from 0 to 65535. Most popular network applications, though, use port numbers at the low end of the range (such as 80 for HTTP).
Note: The term port also refers to several other aspects of network technology. A port can...