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Using Java 8 to convert a list of objects into a string obtained from the toString() method
...).map(e -> e.toString()).reduce("", String::concat);
Explanation: map converts Integer stream to String stream, then its reduced as concatenation of all the elements.
Note: This is normal reduction which performs in O(n2)
for better performance use a StringBuilder or mutable reduction similar...
Is 'float a = 3.0;' a correct statement?
...It is not an error to declare float a = 3.0 : if you do, the compiler will convert the double literal 3.0 to a float for you.
However, you should use the float literals notation in specific scenarios.
For performance reasons:
Specifically, consider:
float foo(float x) { return x * 0.42; }
H...
How can I truncate a datetime in SQL Server?
...the option to cast as a date, it's rarely necessary.
The wrong way:
cast(convert(char(11), getdate(), 113) as datetime)
The wrong way works by converting to a string, truncating the string, and converting back to a datetime. It's wrong, for two reasons: 1)it might not work across all locales and...
java.util.Date to XMLGregorianCalendar
...What if I absolutely need an XMLGregorianCalendar?
There are more ways to convert Instant to XMLGregorianCalendar. I will present a couple, each with its pros and cons. First, just as an XMLGregorianCalendar produces a string like 2009-05-07T17:05:45.678Z, it can also be built from such a string:
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Convert a String In C++ To Upper Case
How could one convert a string to upper case. The examples I have found from googling only have to deal with chars.
29 Answ...
How do you check what version of SQL Server for a database using TSQL?
...me, @ProductLevel sysname, @Edition sysname;
SELECT @ProductVersion = CONVERT(sysname, SERVERPROPERTY('ProductVersion')),
@ProductLevel = CONVERT(sysname, SERVERPROPERTY('ProductLevel')),
@Edition = CONVERT(sysname, SERVERPROPERTY ('Edition'));
--see: http://support2....
How to change Hash values?
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There is also a very neat syntax to convert a list of pairs into a hash, so you can write a_new_hash = Hash[ my_hash.map { |k, v| [k, v.upcase] } ]
– rewritten
Mar 31 '14 at 11:27
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How to convert OutputStream to InputStream?
...ream and second one, which accepts only InputStream . Do you know how to convert OutputStream to InputStream (not vice versa, I mean really this way) that I will be able to connect these two parts?
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AngularJS - convert dates in controller
Could anyone please suggest me how to convert date from this 1387843200000 format into this 24/12/2013 inside my controller ?
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Java: How to convert List to Map
... have conversation with a colleague about what would be the optimal way to convert List to Map in Java and if there any specific benefits of doing so.
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