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In Postgresql, force unique on combination of two columns
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CREATE TABLE someTable (
id serial primary key,
col1 int NOT NULL,
col2 int NOT NULL,
unique (col1, col2)
)
autoincrement is not postgresql. You want a serial.
If col1 and col2 make a unique and can't be null then they make a good primary key:
CREATE TABLE someTab...
Django URL Redirect
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182
You can try the Class Based View called RedirectView
from django.views.generic.base import Re...
How to extract a string using JavaScript Regex?
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91
You need to use the m flag:
multiline; treat beginning and end characters (^ and $) as worki...
How to distinguish mouse “click” and “drag”
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15 Answers
15
Active
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What's the difference between Ruby's dup and clone methods?
...not.
class Foo
attr_accessor :bar
end
o = Foo.new
o.freeze
o.dup.bar = 10 # succeeds
o.clone.bar = 10 # raises RuntimeError
The Rubinius implementation for these methods
is often my source for answers to these questions, since it is quite clear, and a fairly compliant Ruby implementation.
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Getting assembly name
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edited Nov 24 '10 at 11:58
icecrime
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UITextField border color
....borderColor=[[UIColor redColor]CGColor];
textField.layer.borderWidth= 1.0f;
For reverting back to the original layout just set border color to clear color,
serverField.layer.borderColor=[[UIColor clearColor]CGColor];
in swift code
textField.layer.borderWidth = 1
textField.laye...
How to find the lowest common ancestor of two nodes in any binary tree?
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Symfony 2 EntityManager injection in service
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112
Your class's constructor method should be called __construct(), not __constructor():
public f...