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How do I format a number in Java?
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You and String.format() will be new best friends!
https://docs.oracle.com/javase/1.5.0/docs/api/java/util/Formatter.html#syntax
String.format("%.2f", (double)value);
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How to concatenate items in a list to a single string?
Is there a simpler way to concatenate string items in a list into a single string? Can I use the str.join() function?
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How do I use boolean variables in Perl?
...think you wanted to imply a list with an element that consists of an empty string (even though parens don't create lists), but as I've already mentioned, it's impossible to check if a list is true of false.
– ikegami
Apr 13 '11 at 20:42
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Declare a const array
... you need to declare it readonly instead of const:
public static readonly string[] Titles = { "German", "Spanish", "Corrects", "Wrongs" };
The reason is that const can only be applied to a field whose value is known at compile-time. The array initializer you've shown is not a constant expression ...
How to send a JSON object over Request with Android?
... exactly the server wants, consider writing a test program to send various strings to the server until you know what format it needs to be in.
int TIMEOUT_MILLISEC = 10000; // = 10 seconds
String postMessage="{}"; //HERE_YOUR_POST_STRING.
HttpParams httpParams = new BasicHttpParams();
HttpConnecti...
In MVC, how do I return a string result?
In my AJAX call, I want to return a string value back to the calling page.
6 Answers
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How to convert / cast long to String?
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See the reference documentation for the String class: String s = String.valueOf(date);
If your Long might be null and you don't want to get a 4-letter "null" string, you might use Objects.toString, like: String s = Objects.toString(date, null);
EDIT:
You rever...
How do I pass a unique_ptr argument to a constructor or a function?
...rectly in the place of p, but then accessing it each time would involve an extra level of indirection); hence the difference with mode 1 argument passing is minimal. In fact using that mode, the argument could have served directly as local variable, thus avoiding that initial move; this is just an i...
Check if a string contains an element from a list (of strings)
...With LINQ, and using C# (I don't know VB much these days):
bool b = listOfStrings.Any(s=>myString.Contains(s));
or (shorter and more efficient, but arguably less clear):
bool b = listOfStrings.Any(myString.Contains);
If you were testing equality, it would be worth looking at HashSet etc, bu...
Convert a list of characters into a string
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Use the join method of the empty string to join all of the strings together with the empty string in between, like so:
>>> a = ['a', 'b', 'c', 'd']
>>> ''.join(a)
'abcd'
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