大约有 45,000 项符合查询结果（耗时：0.0520秒） [XML]
Is it possible to GROUP BY multiple columns using MySQL?
...ion. At first mysql sorts by the first defined column (with GROUP BY). And if in the first defined column there are equal results, then only within the equal results sorts by the second defined column
– user2360831
Jun 15 '19 at 6:17
...
Can I get CONST's defined on a PHP class?
...
You can use Reflection for this. Note that if you are doing this a lot you may want to looking at caching the result.
<?php
class Profile {
const LABEL_FIRST_NAME = "First Name";
const LABEL_LAST_NAME = "Last Name";
const LABEL_COMPANY_NAME = "Company"...
How do you write a migration to rename an ActiveRecord model and its table in Rails?
...y.
Edit:
In Rails 3.1 & 4, ActiveRecord::Migration::CommandRecorder knows how to reverse rename_table migrations, so you can do this:
class RenameOldTableToNewTable < ActiveRecord::Migration
def change
rename_table :old_table_name, :new_table_name
end
end
(You still have to go t...
How can I find the current OS in Python? [duplicate]
...rchitecture, OS and OS version, version of Python, etc. Also it has os-specific functions to get things like the particular linux distribution.
share
|
improve this answer
|
...
How to escape single quotes within single quoted strings
...
If you really want to use single quotes in the outermost layer, remember that you can glue both kinds of quotation. Example:
alias rxvt='urxvt -fg '"'"'#111111'"'"' -bg '"'"'#111111'"'"
# ^^^^^ ^^...
Octave-Gnuplot-AquaTerm error: set terminal aqua enhanced title “Figure 1”…unknown terminal type"
...y home directory (~/.octaverc) not the directory mentioned above. I don't know what the difference is but home directory seems to be more installation neutral.
– sepans
Mar 29 '14 at 15:17
...
How can I display an image from a file in Jupyter Notebook?
...
Note, until now posted solutions only work for png and jpg!
If you want it even easier without importing further libraries or you want to display an animated or not animated GIF File in your Ipython Notebook. Transform the line where yo...
TypeScript sorting an array
... a function that returns number, not boolean.
You need to return negative if the first item is smaller; positive if it it's larger, or zero if they're equal.
share
|
improve this answer
|
...
Autoincrement VersionCode with gradle extra properties
I'm building an Android app with gradle. Until now I used the Manifest file to increase the versionCode, but I would like to read the versionCode from an external file and depending if it is the release flavor or the debug flavor increase the versionCode. I tried the extra properties, but you can't ...
Does height and width not apply to span?
...
That's the problem. If display: block is specified, span stops to be an inline element and an element after it appears on next line. I need an element which is inline, but could be of desired width.
– Paul
...