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#1071 - Specified key was too long; max key length is 767 bytes
...data model regarding this entity to see if there's improvements that would allow you to implement the intended business rules without hitting the MySQL limitation.
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How to compare arrays in JavaScript?
I'd like to compare two arrays... ideally, efficiently. Nothing fancy, just true if they are identical, and false if not. Not surprisingly, the comparison operator doesn't seem to work.
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Is there any pythonic way to combine two dicts (adding values for keys that appear in both)?
...t;> A + B
Counter({'c': 7, 'b': 5, 'd': 5, 'a': 1})
Counters are basically a subclass of dict, so you can still do everything else with them you'd normally do with that type, such as iterate over their keys and values.
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Are members of a C++ struct initialized to 0 by default?
...hot s; // receives no initialization
Snapshot s = {}; // value initializes all members
The second will make all members zero, the first leaves them at unspecified values. Note that it is recursive:
struct Parent { Snapshot s; };
Parent p; // receives no initialization
Parent p = {}; // value init...
What is a stored procedure?
... a couple of ways. Most major DBMs support stored procedures; however, not all do. You will need to verify with your particular DBMS help documentation for specifics. As I am most familiar with SQL Server I will use that as my samples.
To create a stored procedure the syntax is fairly simple:
CRE...
Permanently add a directory to PYTHONPATH?
...n environment variable in your chosen platform and shell, since it's not really a programming question per se.
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Mysql: Select rows from a table that are not in another
How to select all rows in one table that do not appear on another?
8 Answers
8
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ActionController::InvalidAuthenticityToken
...h were page cached. Pages got buffered with a stale authenticity token and all actions using the methods post/put/delete where recognized as forgery attempts. Error (422 Unprocessable Entity) was returned to the user.
The solution for Rails 3:
Add:
skip_before_filter :verify_authenticity_token
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android on Text Change Listener
I have a situation, where there are two fields. field1 and field2 . All I want
to do is empty field2 when field1 is changed and vice versa. So at the end only
one field has content on it.
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How to make a element expand or contract to its parent container?
...its parent container, in this case a <div> , no matter how big or small that container may be.
5 Answers
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