大约有 40,000 项符合查询结果（耗时：0.0814秒） [XML]
How to run multiple Python versions on Windows
...t to have virtualenv using Python 2.6 created]\[name of virtualenv]
for example
virtualenv -p c:\python2.5\python.exe c:\venvs\2.5
virtualenv -p c:\python2.6\python.exe c:\venvs\2.6
then you can activate the first and work with Python 2.5 like this
c:\venvs\2.5\activate
and when you want to swit...
Why unsigned integer is not available in PostgreSQL?
...Domain is like a type but with an additional constraint.
For an concrete example you could use
CREATE DOMAIN uint2 AS int4
CHECK(VALUE >= 0 AND VALUE < 65536);
Here is what psql gives when I try to abuse the type.
DS1=# select (346346 :: uint2);
ERROR: value for domain uint2 violates che...
Do you leave parentheses in or out in Ruby? [closed]
...
I agree. In php for example I can quickly spot a var by the $ prefix.. in javascript I can reconize a function by the parenthesis(). In Ruby the difference between a var or func (without parenthesis) is not always easy to see.
...
Getting a list of values from a list of dicts
... simple at first glance, because find returns match objects, which include all kinds of things besides just the matched value, such as a path directly to each item. But for more complex expressions, being able to specify a path like '*.[*].value' instead of a comprehension clause for each * can make...
How can I export the schema of a database in PostgreSQL?
... only the schema to stdout as .sql.
For windows, you'll probably want to call pg_dump.exe. I don't have access to a Windows machine but I'm pretty sure from memory that's the command. See if the help works for you too.
shar...
Is there a way to delete a line in Visual Studio without cutting it?
...
Correction in my answer
Ubuntu 16 &
Visual studio Version: 1.30.1
To cut line
Shift + del
To delete line Shift + Ctrl + k
share
|
improve this answer
...
Using capistrano to deploy from different git branches
... HEAD with your branch name, eg: master, staging, etc.
To conclude with examples, in /config/deploy/production.rb, you might include this line:
set :branch, proc { `git rev-parse --abbrev-ref master`.chomp }
...or
set :branch, proc { `git rev-parse --abbrev-ref HEAD`.chomp }
btw, HEAD i...
What is the native keyword in Java for?
...
Minimal runnable example
Main.java
public class Main {
public native int square(int i);
public static void main(String[] args) {
System.loadLibrary("Main");
System.out.println(new Main().square(2));
}
}
Main.c
#...
int value under 10 convert to string two digit number
...
}
For the i = 10 case:
str1: "10"
str2: "010"
I use this, for example, to clear the text on particular Label Controls on my form by name:
private void EmptyLabelArray()
{
var fmt = "Label_Row{0:00}_Col{0:00}";
for (var rowIndex = 0; rowIndex < 100; rowIndex++)
{
fo...
twitter bootstrap autocomplete dropdown / combobox with Knockoutjs
...
How did you use Select2 to allow text input that was not already included in the datasource?
– compcentral
Apr 30 '13 at 14:42
4
...