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How do you know a variable type in java?
...nceof String; will cause error error: incompatible types: Double cannot be converted to String
– Alex78191
Feb 20 at 18:48
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How can I get the DateTime for the start of the week?
...16:00:00Z which is Mon, 03 Sep 2012 00:00:00 in local time. So it needs to convert dt to local time or do something a bit smarter. It would also need to return the result as UTC if the input was UTC.
– row1
Sep 6 '12 at 4:12
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Initializing a static std::map in C++
...the following way (since C++17):
// Example
template<>
class StringConverter<CacheMode> final
{
public:
static auto convert(CacheMode mode) -> const std::string&
{
// validate...
return s_modes.at(mode);
}
private:
static inline const std::map<...
Storing money in a decimal column - what precision and scale?
...mplemented a system that needs to handle values in multiple currencies and convert between them, and figured out a few things the hard way.
NEVER USE FLOATING POINT NUMBERS FOR MONEY
Floating point arithmetic introduces inaccuracies that may not be noticed until they've screwed something up. All v...
What is “vectorization”?
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Vectorization is the term for converting a scalar program to a vector program. Vectorized programs can run multiple operations from a single instruction, whereas scalar can only operate on pairs of operands at once.
From wikipedia:
Scalar approach:
for...
How to create PDFs in an Android app? [closed]
... can then open this dummy activity, take a screenshot programmatically and convert that image to pdf using this library. Of course there are limitations such as not being able to scroll, not more than one page,but for a limited application this is quick and easy. Hope this helps someone!
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How do I grant myself admin access to a local SQL Server instance?
...n your machine, this blog post can help you use SQLCMD to get your account into the SQL Server sysadmin group without having to reinstall. It's a bit of a security hole in SQL Server, if you ask me, but it'll help you out in this case.
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What method in the String class returns only the first N characters?
... that the LINQ version returns a IEnumerable<char>, so you'd have to convert the IEnumerable<char> to string: new string(s.Take(n).ToArray()).
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Remove duplicates from a List in C#
... virtual mode. It was super-fast to make a HashSet<> first and then convert it into a List<> (so ListView can access items by index). List<>.Contains() is too slow.
– Sinatr
Jul 31 '13 at 8:50
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How do you return a JSON object from a Java Servlet
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First convert the JSON object to String. Then just write it out to the response writer along with content type of application/json and character encoding of UTF-8.
Here's an example assuming you're using Google Gson to convert a Ja...