大约有 47,000 项符合查询结果（耗时：0.0670秒） [XML]
Building a notification system [closed]
...cebook style notification system for our page (social gaming type) and I'm now researching what would be the best way to design such system. I'm not interested in how to push notifications to the user or anything like that (for now even). I am researching how to build the system on the server (how t...
How to detect page zoom level in all modern browsers?
...
Now it's an even bigger mess than it was when this question was first asked. From reading all the responses and blog posts I could find, here's a summary. I also set up this page to test all these methods of measuring the zoo...
What is the most frequent concurrency issue you've encountered in Java? [closed]
...actice as the reader thread will eventually see the change - but we don't know how soon he saw it.
share
|
improve this answer
|
follow
|
...
How many characters can UTF-8 encode?
...7,483,648 characters
However, RFC 3629 restricted the possible values, so now we're capped at 4 bytes, which gives us
221 = 2,097,152 characters
Note that a good chunk of those characters are "reserved" for custom use, which is actually pretty handy for icon-fonts.
* Wikipedia used show a table ...
Android Emulator: Installation error: INSTALL_FAILED_VERSION_DOWNGRADE
...here the version number was higher than the copy you're working with right now. In either case, either:
uninstall the currently installed copy
or open up your phone's Settings > Application Manager to determine the version number for the installed app, and increment your <manifest android:v...
Why is using “for…in” for array iteration a bad idea?
...mewhere deep in your JavaScript library...
Array.prototype.foo = 1;
// Now you have no idea what the below code will do.
var a = [1, 2, 3, 4, 5];
for (var x in a){
// Now foo is a part of EVERY array and
// will show up here as a value of 'x'.
console.log(x);
}
/* Will disp...
How can I change the color of a Google Maps marker?
...
Material Design
EDITED MARCH 2019 now with programmatic pin color,
PURE JAVASCRIPT, NO IMAGES, SUPPORTS LABELS
no longer relies on deprecated Charts API
var pinColor = "#FFFFFF";
var pinLabel = "A";
// Pick your pin (hole or no hole)
var ...
filtering NSArray into a new NSArray in Objective-C
...ontains[c] 's'"];
[array filteredArrayUsingPredicate:sPredicate];
// array now contains { @"Chris", @"Melissa" }
share
|
improve this answer
|
follow
|
...
How do you clear the SQL Server transaction log?
...ame size again, not very much is accomplished by shrinking it temporarily. Now, depending on the recovery goals of your database, these are the actions you should take.
First, take a full backup
Never make any changes to your database without ensuring you can restore it should something go wrong.
...
How to make child process die after parent exits?
Suppose I have a process which spawns exactly one child process. Now when the parent process exits for whatever reason (normally or abnormally, by kill, ^C, assert failure or anything else) I want the child process to die. How to do that correctly?
...