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What is the difference between square brackets and parentheses in a regex?
.../^[789]\d{9}$/
/^[7-9]\d{9}$/
The explanation:
(a|b|c) is a regex "OR" and means "a or b or c", although the presence of brackets, necessary for the OR, also captures the digit. To be strictly equivalent, you would code (?:7|8|9) to make it a non capturing group.
[abc] is a "character class" th...
Recommended way to stop a Gradle build
...ion in Gradle (but I could not find one). What is the best way for Gradle (and why?).
6 Answers
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How to import a jar in Eclipse
...igure Build Path. Under Libraries tab, click Add Jars or Add External JARs and give the Jar. A quick demo here.
The above solution is obviously a "Quick" one. However, if you are working on a project where you need to commit files to the source control repository, I would recommend adding Jar fil...
Database design for a survey [closed]
...estions. For example: text fields for comments, multiple choice questions, and possibly questions that could contain more than one answer (i.e. check all that apply).
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Execution time of C program
...Windows machines (from the Win98 era) it was closer to 60ms.
clock() is standard C; it works "everywhere". There are system-specific functions, such as getrusage() on Unix-like systems.
Java's System.currentTimeMillis() does not measure the same thing. It is a "wall clock": it can help you measure...
SSO with CAS or OAuth?
...is not a 'successor' or 'substitute' for CAS, they're different, in intent and in implementation.
CAS centralizes authentication. Use it if you want all your (probably internal) applications to ask users to login to a single server (all applications are configured to point to a single CAS server).
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What is the best way to filter a Java Collection?
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Java 8 (2014) solves this problem using streams and lambdas in one line of code:
List<Person> beerDrinkers = persons.stream()
.filter(p -> p.getAge() > 16).collect(Collectors.toList());
Here's a tutorial.
Use Collection#removeIf to modify the collection...
Avoiding an ambiguous match exception
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Use this overload and use
returnType.GetMethod("Parse", new [] {typeof(string)})
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A fast method to round a double to a 32-bit int explained
... a macro to round a double to a 32-bit int . I extracted the macro , and it looks like this:
3 Answers
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How to send an email using PHP?
I am using PHP on a website and I want to add emailing functionality.
14 Answers
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