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How to change column datatype in SQL database without losing data
...nto 1 (BIT = true).
ALTER TABLE dbo.YourTable
ALTER COLUMN YourColumnName BIT
The other option would be to create a new column of type BIT, fill it from the old column, and once you're done, drop the old column and rename the new one to the old name. That way, if something during the conversio...
Hash Map in Python
I want to implement a HashMap in Python. I want to ask a user for an input. depending on his input I am retrieving some information from the HashMap. If the user enters a key of the HashMap, I would like to retrieve the corresponding value.
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How to declare a variable in MySQL?
...lized, it has a value of NULL and a type of string.
SELECT @var_any_var_name
You can initialize a variable using SET or SELECT statement:
SET @start = 1, @finish = 10;
or
SELECT @start := 1, @finish := 10;
SELECT * FROM places WHERE place BETWEEN @start AND @finish;
User variables can...
Is there any way to do HTTP PUT in python
I need to upload some data to a server using HTTP PUT in python. From my brief reading of the urllib2 docs, it only does HTTP POST . Is there any way to do an HTTP PUT in python?
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SQL exclude a column using SELECT * [except columnA] FROM tableA?
...
I agree with everyone... but if I was going to do something like this I might do it this way:
/* Get the data into a temp table */
SELECT * INTO #TempTable
FROM YourTable
/* Drop the columns that are not needed */
ALTER TABLE #TempTable
DROP COLUMN ColumnToDrop
/* Get results...
When should I make explicit use of the `this` pointer?
When should I explicitly write this->member in a method of
a class?
12 Answers
12...
Catch browser's “zoom” event in JavaScript
...f there's a zoom. I found a good entry here on how you can attempt to implement it.
I’ve found two ways of detecting the
zoom level. One way to detect zoom
level changes relies on the fact that
percentage values are not zoomed. A
percentage value is relative to the
viewport width, and thus unaffe...
How to log a method's execution time exactly in milliseconds?
Is there a way to determine how much time a method needs to execute (in milliseconds)?
20 Answers
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Authorative way to override onMeasure()?
What's the correct way of overriding onMeasure()? I've seen various approaches. For example, Professional Android Development uses MeasureSpec to calculate the dimensions, then ends with a call to setMeasuredDimension(). For example:
...
What does the “+” (plus sign) CSS selector mean?
...
See adjacent selectors on W3.org.
In this case, the selector means that the style applies only to paragraphs directly following another paragraph.
A plain p selector would apply the style to every paragraph in the page.
This will only work on IE7 or above. In IE6, the style will no...