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Java RegEx meta character (.) and ordinary dot?
... have to escape it with a backslash. Since regexes in Java are normal Java strings, you need to escape the backslash itself, so you need two backslashes e.g. \\.
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How do I convert a double into a string in C++?
I need to store a double as a string. I know I can use printf if I wanted to display it, but I just want to store it in a string variable so that I can store it in a map later (as the value , not the key ).
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How should I copy Strings in Java?
...kup variable still contains the original value "hello" (this is because of String's immutability right?).
5 Answers
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How can I convert my device token (NSData) into an NSString?
I am implementing push notifications. I'd like to save my APNS Token as a String.
29 Answers
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How do I replace multiple spaces with a single space in C#?
How can I replace multiple spaces in a string with only one space in C#?
24 Answers
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Uses for Optional
...de to work, but it's rather clumsy. Suppose you have a method that takes a string followed by an optional second string. Accepting an Optional as the second arg would result in code like this:
foo("bar", Optional.of("baz"));
foo("bar", Optional.empty());
Even accepting null is nicer:
foo("bar", ...
Create an Array of Arraylists
... Any reason this would be preferable over @kelvincer Answer (ArrayList<String>[] group = new ArrayList[4])? What extra good doe sthe cast do?
– cellepo
Mar 22 '16 at 21:12
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Remove all special characters except space from a string using JavaScript
I want to remove all special characters except space from a string using JavaScript.
11 Answers
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Are there any SHA-256 javascript implementations that are generally considered trustworthy?
...I agree with @NickBrunt . It is better if the attacker reads a random hash string that may fit only with this particular app rather than the original password that may be used in several places.
– Aebsubis
May 28 '14 at 15:16
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Clear android application user data
...mission.
So, run su first.
Here is the sample code:
private static final String CHARSET_NAME = "UTF-8";
String cmd = "pm clear com.android.browser";
ProcessBuilder pb = new ProcessBuilder().redirectErrorStream(true).command("su");
Process p = pb.start();
// We must handle the result stream in an...