大约有 44,300 项符合查询结果（耗时：0.0432秒） [XML]
Formula to determine brightness of RGB color
...
20 Answers
20
Active
...
How to change the output color of echo in Linux
...
2435
You can use these ANSI escape codes:
Black 0;30 Dark Gray 1;30
Red 0...
Print list without brackets in a single row
...
12 Answers
12
Active
...
Storing sex (gender) in database
...-----------------------------------------
TinyINT 1 255 (zero to 255)
INT 4 - 2,147,483,648 to 2,147,483,647
BIT 1 (2 if 9+ columns) 2 (0 and 1)
CHAR(1) 1 26 if case insensitive, 52 otherwise
The BIT data type can be r...
Force LF eol in git repo and working copy
...
237
Without a bit of information about what files are in your repository (pure source code, images...
Active Record - Find records which were created_at before today
...
Using ActiveRecord the standard way:
MyModel.where("created_at < ?", 2.days.ago)
Using the underlying Arel interface:
MyModel.where(MyModel.arel_table[:created_at].lt(2.days.ago))
Using a thin layer over Arel:
MyModel.where(MyModel[:created_at] < 2.days.ago)
Using squeel:
MyModel.w...
How can I redirect the output of the “time” command?
... |
edited Mar 9 '10 at 12:37
Motti
95.3k4242 gold badges176176 silver badges242242 bronze badges
answe...
What's the difference between console.dir and console.log?
.....
You can also see a clear difference with arrays (e.g., console.dir([1,2,3])) which are logged differently from normal objects:
> console.log([1,2,3])
[1, 2, 3]
> console.dir([1,2,3])
* Array[3]
0: 1
1: 2
2: 3
length: 3
* __proto__: Array[0]
concat: function c...
how to convert binary string to decimal?
... base in which the string representation is:
var digit = parseInt(binary, 2);
See it in action.
share
|
improve this answer
|
follow
|
...
PHP Foreach Pass by Reference: Last Element Duplicating? (Bug?)
... $item is still a reference to some value which is also being used by $arr[2]. So each foreach call in the second loop, which does not call by reference, replaces that value, and thus $arr[2], with the new value.
So loop 1, the value and $arr[2] become $arr[0], which is 'foo'.
Loop 2, the value and ...