大约有 30,000 项符合查询结果（耗时：0.0444秒） [XML]
What's the best manner of implementing a social activity stream? [closed]
...stem and I took this approach:
Database table with the following columns: id, userId, type, data, time.
userId is the user who generated the activity
type is the type of the activity (i.e. Wrote blog post, added photo, commented on user's photo)
data is a serialized object with meta-data for the ...
How do you check that a number is NaN in JavaScript?
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If you want an empty string to be interpreted as NaN, then yes. (I’m not saying you always would.)
– Paul D. Waite
Apr 16 '10 at 12:20
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Location of sqlite database on the device
...ntext.getXXXPath()
One of them is android.content.Context.getDatabasePath(String dbname) that returns the absolute path of a database called dbname.
Context ctx = this; // for Activity, or Service. Otherwise simply get the context.
String dbname = "mydb.db";
Path dbpath = ctx.getDatabasePath(dbnam...
What's the difference between an argument and a parameter?
... are the data you pass into the method's parameters.
public void MyMethod(string myParam) { }
...
string myArg1 = "this is my argument";
myClass.MyMethod(myArg1);
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Regex (grep) for multi-line search needed [duplicate]
...iods) and blanks, but also quotes and anything that can be inside a quoted string.
I would likely go with a Perl-based solution, having Perl read 'paragraphs' at a time and applying a regex to that. The downside is having to deal with the recursive search - there are modules to do that, of course,...
Two inline-block, width 50% elements wrap to second line [duplicate]
I would like to have two columns of 50% width space, and avoid floats.
So i thought using display:inline-block .
5 Answers...
iOS开发调试技巧总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ntroller.h"
#defineNSLog(format,...)do{\
fprintf(stderr,"%s\n",\
[[[NSStringstringWithUTF8String:__FILE__]lastPathComponent]UTF8String],\
__LINE__,__func__);\
(NSLog)((format),##__VA_ARGS__);\
fprintf(stderr,"-------\n");\
}while(0)
@interfaceViewController
@end
@implementationView...
Measure execution time for a Java method [duplicate]
...th System.currentTimeMillis()
class TimeTest1 {
public static void main(String[] args) {
long startTime = System.currentTimeMillis();
long total = 0;
for (int i = 0; i < 10000000; i++) {
total += i;
}
long stopTime = System.currentTimeMillis();
l...
Remove CSS class from element with JavaScript (no jQuery) [duplicate]
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The right and standard way to do it is using classList. It is now widely supported in the latest version of most modern browsers:
ELEMENT.classList.remove("CLASS_NAME");
remove.onclick = () => {
const el = document.querySelector('#el');
if (el.classList.contains("red")) {
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MySQL and GROUP_CONCAT() maximum length
...g GROUP_CONCAT() in a MySQL query to convert multiple rows into a single string.
However, the maximum length of the result of this function is 1024 characters.
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