大约有 43,100 项符合查询结果（耗时：0.0567秒） [XML]
Get an object properties list in Objective-C
...
13 Answers
13
Active
...
How do you delete an ActiveRecord object?
...
It's destroy and destroy_all methods, like
user.destroy
User.find(15).destroy
User.destroy(15)
User.where(age: 20).destroy_all
User.destroy_all(age: 20)
Alternatively you can use delete and delete_all which won't enforce :before_destroy and :after_destroy callbacks or any dependent associ...
List of all special characters that need to be escaped in a regex
...
10 Answers
10
Active
...
How can I format patch with what I stash away
...
163
Sure, git stash show supports this:
git stash show -p
So, use
git stash list
to find out th...
How to initialize a private static const map in C++?
...
10 Answers
10
Active
...
Fixing JavaScript Array functions in Internet Explorer (indexOf, forEach, etc.) [closed]
...function(owner) {
var that= this;
if (arguments.length<=1) {
return function() {
return that.apply(owner, arguments);
};
} else {
var args= Array.prototype.slice.call(arguments, 1);
return function() {
...
How to send data to local clipboard from a remote SSH session
...
11 Answers
11
Active
...
Browsers' default CSS for HTML elements
...of all W3C HTML spec and vendor default CSS stylesheets can be found here
1. Default Styles for Firefox
2. Default Styles for Internet Explorer
3. Default Styles for Chrome / Webkit
4. Default Styles for Opera
5. Default Styles for HTML4 (W3C spec)
6. Default Styles for HTML5 (W3C spec)
Sampl...
Try-finally block prevents StackOverflowError
...evel into the finally block take twice as long an the stack depth could be
10,000 or more. If you can make 10,000,000 calls per second, this will take 10^3003 seconds or longer than the age of the universe.
share
...
Formula to determine brightness of RGB color
...ightness? Luminance?
Luminance (standard for certain colour spaces): (0.2126*R + 0.7152*G + 0.0722*B) [1]
Luminance (perceived option 1): (0.299*R + 0.587*G + 0.114*B) [2]
Luminance (perceived option 2, slower to calculate): sqrt( 0.241*R^2 + 0.691*G^2 + 0.068*B^2 ) → sqrt( 0.299*R^2 + 0.587*G^...