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In Vim, I'd like to go back a word. The opposite of `w`
... What's the difference between b and B? Or w and W? Behavior seems the same.
– Casey Patton
Oct 11 '13 at 19:48
@Cas...
Error: Could not create the Java Virtual Machine Mac OSX Mavericks
...he Mac 10.9.4. I then ran the command java -v in Terminal and I get this message:
6 Answers
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Primary key or Unique index?
...mn foo when it tries to insert the value 1 into this column for a second time.
In MySQL a unique constraint allows multiple NULLs.
It is possible to make a unique index on mutiple columns.
Primary key versus unique index
Things that are the same:
A primary key implies a unique index.
Things ...
Which MySQL data type to use for storing boolean values
...ording to the MySQL manual you can use BOOL or BOOLEAN, which are at the moment aliases of tinyint(1):
Bool, Boolean: These types are synonyms for TINYINT(1). A value of
zero is considered false. Non-zero
values are considered true.
MySQL also states that:
We intend to implement full boolean
type...
Access Control Request Headers, is added to header in AJAX request with jQuery
...
What you saw in Firefox was not the actual request; note that the HTTP method is OPTIONS, not POST. It was actually the 'pre-flight' request that the browser makes to determine whether a cross-domain AJAX request should be allowed:
http://www.w3.org/TR/cors/
The Access-Control-Request-Headers...
Iterate over model instance field names and values in template
...mplate to display the selected instance's field values, along with their names. Think of it as just a standard output of the values of that instance in table format, with the field name (verbose_name specifically if specified on the field) in the first column and the value of that field in the seco...
CSS center text (horizontally and vertically) inside a div block
...a div set to display:block ( 90px height and width ), and I have some text inside.
27 Answers
...
Disable all table constraints in Oracle
...t_type in the WHERE clause.
BEGIN
FOR c IN
(SELECT c.owner, c.table_name, c.constraint_name
FROM user_constraints c, user_tables t
WHERE c.table_name = t.table_name
AND c.status = 'ENABLED'
AND NOT (t.iot_type IS NOT NULL AND c.constraint_type = 'P')
ORDER BY c.constraint_type DE...
HTML/Javascript change div content
I have simple HTML code with some javascript, it looks like:
6 Answers
6
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What generates the “text file busy” message in Unix?
...
This error means some other process or user is accessing your file. Use lsof to check what other processes are using it. You can use kill command to kill it if needed.
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