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How to check if a string contains only digits in Java [duplicate]
In Java for String class there is a method called matches, how to use this method to check if my string is having only digits using regular expression. I tried with below examples, but both of them returned me false as result.
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When should I make explicit use of the `this` pointer?
When should I explicitly write this->member in a method of
a class?
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What does the “+” (plus sign) CSS selector mean?
For example:
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ActiveRecord.find(array_of_ids), preserving order
When you do Something.find(array_of_ids) in Rails, the order of the resulting array does not depend on the order of array_of_ids .
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Clearing a string buffer/builder after loop
How do you clear the string buffer in Java after a loop so the next iteration uses a clear string buffer?
8 Answers
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SQL Server Installation - What is the Installation Media Folder?
I am installing SQL Server 2008. I have installed .NET framework 3.5.
Then I got folder SQL Server 2008 and performed following steps-
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How to get current relative directory of your Makefile?
I have a several Makefiles in app specific directories like this:
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I have 2 dates in PHP, how can I run a foreach loop to go through all of those days?
...ate 2010-05-01 and ending with 2010-05-10 . How can I iterate through all of those dates in PHP?
11 Answers
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Read url to string in few lines of java code
I'm trying to find Java's equivalent to Groovy's:
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What is the size of an enum in C?
I'm creating a set of enum values, but I need each enum value to be 64 bits wide. If I recall correctly, an enum is generally the same size as an int; but I thought I read somewhere that (at least in GCC) the compiler can make the enum any width they need to be to hold their values. So, is it possib...