大约有 47,000 项符合查询结果（耗时：0.0635秒） [XML]
How do I set a variable to the output of a command in Bash?
...
vstepaniuk
27022 silver badges88 bronze badges
answered Jan 10 '11 at 21:04
Andy LesterAndy Lester
...
Count with IF condition in MySQL query
...ELECT
ccc_news . * ,
SUM(if(ccc_news_comments.id = 'approved', 1, 0)) AS comments
FROM
ccc_news
LEFT JOIN
ccc_news_comments
ON
ccc_news_comments.news_id = ccc_news.news_id
WHERE
`ccc_news`.`category` = 'news_layer2'
AND `ccc_news`.`status` = 'Active'
GROU...
Overloading Macro on Number of Arguments
...
270
Simple as:
#define GET_MACRO(_1,_2,_3,NAME,...) NAME
#define FOO(...) GET_MACRO(__VA_ARGS__, FO...
Drawing an image from a data URL to a canvas
...t('2d');
var img = new Image;
img.onload = function(){
ctx.drawImage(img,0,0); // Or at whatever offset you like
};
img.src = strDataURI;
Edit: I previously suggested in this space that it might not be necessary to use the onload handler when a data URI is involved. Based on experimental tests f...
Matplotlib: “Unknown projection '3d'” error
...
First off, I think mplot3D worked a bit differently in matplotlib version 0.99 than it does in the current version of matplotlib.
Which version are you using? (Try running: python -c 'import matplotlib; print matplotlib."__version__")
I'm guessing you're running version 0.99, in which case you'll...
What's the best way to check if a String represents an integer in Java?
...ncerned with potential overflow problems this function will perform about 20-30 times faster than using Integer.parseInt().
public static boolean isInteger(String str) {
if (str == null) {
return false;
}
int length = str.length();
if (length == 0) {
return false;
...
Convert integer into its character equivalent, where 0 => a, 1 => b, etc
... lower case letters:
var chr = String.fromCharCode(97 + n); // where n is 0, 1, 2 ...
97 is the ASCII code for lower case 'a'. If you want uppercase letters, replace 97 with 65 (uppercase 'A'). Note that if n > 25, you will get out of the range of letters.
...
“You don't have a SNAPSHOT project in the reactor projects list.” when using Jenkins Maven release p
I'm using SVN, Maven 3.0.3 on the latest version of Jenkins and the Maven Release plugin. I'm trying to use the Maven release plugin (through Jenkins) do a dry run and so am executing the options …
...
How does RegexOptions.Compiled work?
...
304
RegexOptions.Compiled instructs the regular expression engine to compile the regular expression...