大约有 40,000 项符合查询结果（耗时：0.0626秒） [XML]
ActiveRecord: List columns in table from console
...ou can just type the model name:
> User
gives:
User(id: integer, name: string, email: string, etc...)
In rails four, you need to establish a connection first:
irb(main):001:0> User
=> User (call 'User.connection' to establish a connection)
irb(main):002:0> User.connection; nil #call ...
Inherit docstrings in Python class inheritance
...init__ definition in Y but this seems to mess with the formatting, causing extra added spaces.
– mgilbert
Oct 15 '17 at 9:53
add a comment
|
...
Accessing the index in 'for' loops?
... @user12379095 you probably have the data in the wrong type (a string) and you need to convert it to an actual list of numbers instead of a string. That is somewhat off topic here, please delete your comment and flag mine to be deleted as no longer needed when you see this.
...
Does Swift have access modifiers?
... types of "private" and "fileprivate":
class A {
private var aPrivate: String?
fileprivate var aFileprivate: String?
func accessMySelf() {
// this works fine
self.aPrivate = ""
self.aFileprivate = ""
}
}
// Declaring "B" for checking the abiltiy of accessing...
How to install MySQLdb (Python data access library to MySQL) on Mac OS X?
...1:
Download the latest MySQL for Python adapter from SourceForge.
Step 2:
Extract your downloaded package:
tar xzvf MySQL-python-1.2.2.tar.gz
Step 3:
Inside the folder, clean the package:
sudo python setup.py clean
COUPLE OF EXTRA STEPS, (from this comment)
Step 3b:
Remove everything under ...
How to remove newlines from beginning and end of a string?
I have a string that contains some text followed by a blank line. What's the best way to keep the part with text, but remove the whitespace newline from the end?
...
Difference between shared objects (.so), static libraries (.a), and DLL's (.so)?
...to open and use a .so or .dll that wasnt there at compile that or just add extra functionality, like plugins.
– rapadura
Mar 13 '12 at 16:49
...
How to easily resize/optimize an image size with iOS?
...ge to center or any of four edges and four corners.
And also you can trim extra space which is added if aspect ratios of original image and target size are not equal.
enum UIImageAlignment {
case Center, Left, Top, Right, Bottom, TopLeft, BottomRight, BottomLeft, TopRight
}
enum UIImageScaleM...
Loading a properties file from Java package
...e directory which represents the package the class is in.
Using java.lang.String.class.getResource("foo.txt") would search for the (inexistent) file /java/lang/String/foo.txt on the classpath.
Using an absolute path (one that starts with '/') means that the current package is ignored.
...
Converting RGB to grayscale/intensity
...th 32 bits i.e. 4 bytes per pixel
unsigned int fourBytes;
unsigned char r,g,b;
for (int index=0;index<width*height;index++)
{
fourBytes=pntrBWImage[index];//caches 4 bytes at a time
r=(fourBytes>>16);
g=(fourBytes>>8);
...