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How to use GROUP BY to concatenate strings in SQL Server?
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Should I use a data.frame or a matrix?
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Part of the answer is contained already in your question: You use data frames if columns (vari...
How do write IF ELSE statement in a MySQL query
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You probably want to use a CASE expression.
They look like this:
SELECT col1, col2, (case wh...
undefined method `source_index' for Gem:Module (NoMethodError)
...to this problem myself while trying to upgrade an older Rails app from REE 1.8.7 to 1.9.3-p385. Oddly, Ruby 1.9.3-p327 works just fine. What it came down to was ruby-1.9.3-p385 had installed RubyGems version 2.0.2 for me, and 1.9.3-p327 has RubyGems v1.8.23 installed.
Gem.source_index has been depr...
List of zeros in python [duplicate]
...zeros? I want to be able to create a zeros list for each int in range(10)
8 Answers
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How to remove element from an array in JavaScript?
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12 Answers
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Save Screen (program) output to a file
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Number of rows affected by an UPDATE in PL/SQL
I have a PL/SQL function (running on Oracle 10g) in which I update some rows. Is there a way to find out how many rows were affected by the UPDATE? When executing the query manually it tells me how many rows were affected, I want to get that number in PL/SQL.
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Ukkonen's suffix tree algorithm in plain English
...se, each
edge carries a string label of arbitrary length, but takes only O(1)
space (two pointers).
Basic principle
I would like to first demonstrate how to create the suffix tree of a
particularly simple string, a string with no repeated characters:
abc
The algorithm works in steps, from left...