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ERROR: Error 1005: Can't create table (errno: 121)
...y used somewhere else
To check constraints use the following SQL query:
SELECT
constraint_name,
table_name
FROM
information_schema.table_constraints
WHERE
constraint_type = 'FOREIGN KEY'
AND table_schema = DATABASE()
ORDER BY
constraint_name;
Look for more information there,...
How to detect iPhone 5 (widescreen devices)?
..., when comparing floating points, as pointed in the comments by H2CO3.
So from now on you can use it in standard if/else statements:
if( IS_IPHONE_5 )
{}
else
{}
Edit - Better detection
As stated by some people, this does only detect a widescreen, not an actual iPhone 5.
Next versions of the i...
Where do I find the line number in the Xcode editor?
... preference by clicking on xcode on left hand side uper corner.
2) then select Text Editing
3) then select Show: Line numbers and click on check box for enable it.
4) close it.
5) you will see the line number in xcode.
...
What is a “memory stomp”?
...will appear when something tries to access the victim that was stomped on, and the code that stomped on it may be totally unrelated.
Another is accessing memory after it was freed. The memory may be allocated for another object. Again, the code that shows the problem may be related to the newly-all...
Add unique constraint to combination of two columns
....YourTable
INSTEAD OF INSERT
AS
BEGIN
SET NOCOUNT ON;
IF NOT EXISTS (SELECT 1 FROM inserted AS i
INNER JOIN dbo.YourTable AS t
ON i.column1 = t.column1
AND i.column2 = t.column2
)
BEGIN
INSERT dbo.YourTable(column1, column2, ...)
SELECT column1, column2, ... FROM ins...
Algorithm to implement a word cloud like Wordle
...ou color and size words based on different weightings and it supports word selection (from a coordinate) and selected word highlighting. The source is yours to use as you see fit.
share
|
improve...
CALL command vs. START with /WAIT option
...ns.
call myProg param1 param^^2 "param^3" %%path%%
Will be expanded to (from within an batch file)
myProg param1 param2 param^^3 <content of path>
share
|
improve this answer
|...
What's the difference between the atomic and nonatomic attributes?
...ynthesized setter/getter will ensure that a whole value is always returned from the getter or set by the setter, regardless of setter activity on any other thread. That is, if thread A is in the middle of the getter while thread B calls the setter, an actual viable value -- an autoreleased object,...
Open file dialog box in JavaScript
...
$("#logo").css('opacity','0');
$("#select_logo").click(function(e){
e.preventDefault();
$("#logo").trigger('click');
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<a href="#" ...
What is a stream?
...ext time you read, you'll get the next byte, and so on.
read several bytes from the stream into an array
seek (move your current position in the stream, so that next time you read you get bytes from the new position)
write one byte
write several bytes from an array into the stream
skip bytes from th...