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What's the role of GetHashCode in the IEqualityComparer in .NET?
...ou need to compare Equals would be enouf, but when you need to get element from Dictionary it's easier to do this by hash, not by using Equals.
– Ash
Nov 4 '10 at 10:20
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How to write a Ruby switch statement (case…when) with regex and backreferences?
...se named capture groups in your regexes) and nicely separates your regexes from your search logic (which may or may not yield clearer code), you could even load your regexes from a config file or choose which set of them you wanted at run time.
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How to convert the ^M linebreak to 'normal' linebreak in a file opened in vim?
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From all the solutions offered on this page, this was the only pattern that worked for me in removing ^M from a csv file. Using MacVim.
– B6431
May 21 '14 at 15:45
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How to read json file into java with simple JSON library
...refore, your parser will return a JSONArray. You can then get JSONObjects from the array ...
JSONArray a = (JSONArray) parser.parse(new FileReader("c:\\exer4-courses.json"));
for (Object o : a)
{
JSONObject person = (JSONObject) o;
String name = (String) person.get("name");
Sys...
Can I change multiplier property for NSLayoutConstraint?
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If you have only have two sets of multipliers that need to be applied, from iOS8 onwards you can add both sets of constraints and decide which should be active at any time:
NSLayoutConstraint *standardConstraint, *zoomedConstraint;
// ...
// switch between constraints
standardConstraint.active...
How to print out more than 20 items (documents) in MongoDB's shell?
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From the shell if you want to show all results you could do db.collection.find().toArray() to get all results without it.
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Check a collection size with JSTL
...ly using a too old EL version. You'll need JSTL fn:length() function then. From the documentation:
length( java.lang.Object) - Returns the number of items in a collection, or the number of characters in a string.
Put this at the top of JSP page to allow the fn namespace:
<%@ taglib prefix="fn" ...
How to get a substring of text?
...ast (source code)
'1234567890'.last(2) # => "90"
alternatively check from/to (source code):
"hello".from(1).to(-2) # => "ell"
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How to test if one java class extends another at runtime?
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Are you looking for:
Super.class.isAssignableFrom(Sub.class)
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Install parent POM without building Child modules
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Use the '-N' option in the mvn command.
From mvn -h:
-N,--non-recursive Do not recurse into sub-projects
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