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sqlalchemy unique across multiple columns
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Extract from the documentation of the Column:
unique – When True, indicates that this column contains a unique
constraint, or if index is True as well, indicates that the Index
should be created with the unique flag. To spe...
Global variables in AngularJS
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From the Angular FAQ: Conversely, don't create a service whose only purpose in life is to store and return bits of data.
– Jakob Stoeck
Feb 21 '13 at 15:52
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Difference between jQuery’s .hide() and setting CSS to display: none
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From the jQuery page about .hide():
"The matched elements will be hidden immediately, with no animation. This is roughly equivalent to calling .css('display', 'none'), except that the value of the display property is save...
Foreign key constraints: When to use ON UPDATE and ON DELETE
...We'll take an example, a company table with a user table containing people from theses company
CREATE TABLE COMPANY (
company_id INT NOT NULL,
company_name VARCHAR(50),
PRIMARY KEY (company_id)
) ENGINE=INNODB;
CREATE TABLE USER (
user_id INT,
user_name VARCHAR(50),
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Java Byte Array to String to Byte Array
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You can't just take the returned string and construct a string from it... it's not a byte[] data type anymore, it's already a string; you need to parse it. For example :
String response = "[-47, 1, 16, 84, 2, 101, 110, 83, 111, 109, 101, 32, 78, 70, 67, 32, 68, 97, 116, 97]"; // re...
Prompt Dialog in Windows Forms
... your Project Explorer window then on Add Reference, and check VisualBasic from that list.
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“Eliminate render-blocking CSS in above-the-fold content”
...ake worse than better for 'normal' websites.
And not everything that comes from Google is the "holy grail" just because it comes from Google. And they themselves are not a good role model if you have a look at their HTML markup.
The best advice I could give you is:
Set width and height on repla...
Using C++ library in C code
...bar)
{
return realFoo(std::string(bar));
}
Then, you will call foo() from your C module, which will pass the call on to the realFoo() function which is implemented in C++.
If you need to expose a full C++ class with data members and methods, then you may need to do more work than this simple ...
Why is SSE scalar sqrt(x) slower than rsqrt(x) * x?
...ere http://www.intel.com/products/processor/manuals/. I'd suggest to start from reading about processor functions you are using, there are some info, especially about rsqrt (cpu is using internal lookup table with huge approximation, which makes it much simpler to get the result). It may seem, that ...
Python dict how to create key or append an element to key?
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You can use a defaultdict for this.
from collections import defaultdict
d = defaultdict(list)
d['key'].append('mykey')
This is slightly more efficient than setdefault since you don't end up creating new lists that you don't end up using. Every call to setdefa...