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SQL how to make null values come last when sorting ascending
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Note however that if you place an index on the sort column to improve performance(*), then this method will somewhat complicate the query plan and lose much of the performance benefit. * - indexes provided the data presorted, hence avoiding a sort per query execu...
How to compare Lists in Unit Testing
... collections, you should use CollectionAssert:
CollectionAssert.AreEqual(expected, actual);
List<T> doesn't override Equals, so if Assert.AreEqual just calls Equals, it will end up using reference equality.
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Rails Object to hash
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Don't use this when looping, Expensive method. Go with as_json
– AnkitG
Jul 10 '13 at 8:07
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How to exit if a command failed?
I am a noob in shell-scripting. I want to print a message and exit my script if a command fails. I've tried:
8 Answers
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Too many 'if' statements?
The following code does work how I need it to, but it's ugly, excessive or a number of other things. I've looked at formulas and attempted to write a few solutions, but I end up with a similar amount of statements.
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random.seed(): What does it do?
I am a bit confused on what random.seed() does in Python. For example, why does the below trials do what they do (consistently)?
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Why can't I make a vector of references?
...cept at boost.org/doc/libs/1_39_0/doc/html/Assignable.html all operations except the swap are valid on references.
– amit
Aug 18 '09 at 16:01
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Java generics type erasure: when and what happens?
...ut when generics are used, they're converted into compile-time checks and execution-time casts. So this code:
List<String> list = new ArrayList<String>();
list.add("Hi");
String x = list.get(0);
is compiled into
List list = new ArrayList();
list.add("Hi");
String x = (String) list.ge...
Can I write a CSS selector selecting elements NOT having a certain class or attribute?
...tor rule that selects all elements that don't have a certain class. For example, given the following HTML:
10 Answers
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