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A fast method to round a double to a 32-bit int explained
... number is obviously made positive by adding the magic number, and the resulting value is 252+251+(-a).
Now, what do we get if we interpret the mantissa in 2's complement representation? It must be the result of 2's complement sum of (252+251) and (-a). Again, the first term affects only the upper ...
Remove duplicate rows in MySQL
...to do this is to add a UNIQUE index on the 3 columns. When you write the ALTER statement, include the IGNORE keyword. Like so:
ALTER IGNORE TABLE jobs
ADD UNIQUE INDEX idx_name (site_id, title, company);
This will drop all the duplicate rows. As an added benefit, future INSERTs that are duplic...
LISTAGG in Oracle to return distinct values
...not considered). While i do that i will get something like this as the result od LISTAGG :->[2,2,3,4,5] I need to remove the duplicate'2' here.I Need only the distinct values of col2 against col1.
– Priyanth
Jul 17 '12 at 11:44
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Gson: Directly convert String to JsonObject (no POJO)
...elow:
JsonElement element = new JsonPrimitive(yourString);
JsonObject result = element.getAsJsonObject();
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Catch multiple exceptions at once?
... I agree with not catching Exception, but, in this case, the catch is a filter. You may have a layer higher that will handle other exception types. I would say this is correct, even though it includes a catch(Exception x). It doesn't modify the program flow, it just handles certain exceptions then ...
How do I drop a function if it already exists?
...
if object_id('FUNCTION_NAME') is not NULL
DROP FUNCTION <name>
You can also look the name up in sysobjects
IF EXISTS (SELECT *
FROM sysobjects
WHERE name='<function name>' and xtype='FN'
Actually, if the function could be a table function, you...
How is null + true a string?
...ith respect to the argument list (x, y), and this operator becomes the result of the overload resolution process. If overload resolution fails to select a single best operator, a binding-time error occurs.
So, let's walk through this in turn.
X is the null type here - or not a type at all, if ...
ASP.NET MVC RequireHttps in Production Only
... [RequireHttps] //apply to this action only
#endif
public ActionResult SomeAction()
{
}
}
Update
In Visual Basic, attributes are technically part of the same line as the definition they apply to. You can't put conditional compilation statements inside a line, so you're forced to w...
Python Pandas: Get index of rows which column matches certain value
...e the difference quite clearly by playing with a DataFrame with
a non-default index that does not equal to the row's numerical position:
df = pd.DataFrame({'BoolCol': [True, False, False, True, True]},
index=[10,20,30,40,50])
In [53]: df
Out[53]:
BoolCol
10 True
20 False
30 False...
Make fill entire screen?
...with AJAX. On one page (a search page), there were cases when the AJAX results would more than fill the page, and cases where it would return no results. In order for the background image to fill the page in all cases we had to apply the following CSS:
html {
margin: 0px;
height: 100%;
wid...