regular expression for numeric digit starting with '$' sign

I want a regular expression to validate these type of string formats:


Also is there any good tool to make regular expressions?



please check.. this matched your test cases.

Here is the regular expression : \$?-?\d+\.\d+

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ConcurrentSkipListSet and re-sorting (java)

java list sorting concurrency

I am using a ConcurrentSkipListSet, that is obviously accessed through multiple threads. Now, the values that are used by the compareTo-method of the underlying objects change overtime. Because of ...

C++ standard library: initialize a container by using standard input

c++ containers std

We can initialize a container deque by using standard input like this:

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