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Difference between null and empty (“”) Java String
What is the difference between null and the "" (empty string)?
22 Answers
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How to insert newline in string literal?
In .NET I can provide both \r or \n string literals, but there is a way to insert
something like "new line" special character like Environment.NewLine static property?
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How to resolve “must be an instance of string, string given” prior to PHP 7?
...s. Scalar types are not type-hintable. In this case an object of the class string is expected, but you're giving it a (scalar) string. The error message may be funny, but it's not supposed to work to begin with. Given the dynamic typing system, this actually makes some sort of perverted sense.
You ...
How do I convert a TimeSpan to a formatted string? [duplicate]
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Would TimeSpan.ToString() do the trick for you? If not, it looks like the code sample on that page describes how to do custom formatting of a TimeSpan object.
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Get url parameters from a string in .NET
I've got a string in .NET which is actually a url. I want an easy way to get the value from a particular parameter.
13 A...
How do I print the type or class of a variable in Swift?
...below to the new Swift 2.0 syntax (e.g. println was replaced with print, toString() is now String()).
From the Xcode 6.3 release notes:
@nschum points out in the comments that the Xcode 6.3 release notes show another way:
Type values now print as the full demangled type name when used with
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Converting 'ArrayList to 'String[]' in Java
How might I convert an ArrayList<String> object to a String[] array in Java?
16 Answers
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How is null + true a string?
Since true is not a string type, how is null + true a string ?
7 Answers
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How can I list all tags in my Git repository by the date they were created?
...g --sort=-creatordate
As I detail in "How to sort git tags by version string order of form rc-X.Y.Z.W?", you can add a sort order to git tag (since Git 2.0 June 2014).
That sort order includes as field name (listed in git for-each-ref) taggerdate. That allows for git tag --sort=taggerdate (me...
Match two strings in one line with grep
I am trying to use grep to match lines that contain two different strings. I have tried the following but this matches lines that contain either string1 or string2 which not what I want.
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