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Definition of a Balanced Tree
I am just wondering if someone might be able to clarify the definition of a balanced tree for me. I have that "a tree is balanced if each sub-tree is balanced and the height of the two sub-trees differ by at most one.
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How to generate unique ID with node.js
How to set a variable value with database query callback? How I can do it?
13 Answers
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How to find list of possible words from a letter matrix [Boggle Solver]
Lately I have been playing a game on my iPhone called Scramble. Some of you may know this game as Boggle. Essentially, when the game starts you get a matrix of letters like so:
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Default value in Go's method
Is there a way to specify default value in Go's function? I am trying to find this in the documentation but I can't find anything that specifies that this is even possible.
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Using NSPredicate to filter an NSArray based on NSDictionary keys
I have an array of dictionaries.
6 Answers
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How to mkdir only if a directory does not already exist?
I am writing a shell script to run under the KornShell (ksh) on AIX. I would like to use the mkdir command to create a directory. But the directory may already exist, in which case I do not want to do anything. So I want to either test to see that the directory does not exist, or suppress the "Fil...
How do I find the duplicates in a list and create another list with them?
How can I find the duplicates in a Python list and create another list of the duplicates? The list only contains integers.
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updating table rows in postgres using subquery
Using postgres 8.4, My goal is to update existing table:
6 Answers
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How to generate random SHA1 hash to use as ID in node.js?
I am using this line to generate a sha1 id for node.js:
4 Answers
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Check if a Windows service exists and delete in PowerShell
I am currently writing a deployment script that installs a number of Windows services.
14 Answers
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