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How do you detect where two line segments intersect? [closed]
... determine whether or not two lines intersect, and if they do, at what x,y point?
27 Answers
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How to rename a file using Python
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Use os.rename:
import os
os.rename('a.txt', 'b.kml')
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Principal component analysis in Python
I'd like to use principal component analysis (PCA) for dimensionality reduction. Does numpy or scipy already have it, or do I have to roll my own using numpy.linalg.eigh ?
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How do I display the current value of an Android Preference in the Preference summary?
This must come up very often.
34 Answers
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How do I reset a sequence in Oracle?
In PostgreSQL , I can do something like this:
18 Answers
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Permutations in JavaScript?
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If you notice, the code actually splits the chars into an array prior to do any permutation, so you simply remove the join and split operation
var permArr = [],
usedChars = [];
function permute(input) {
var i, ch;
for (i = 0; i < input.len...
In C#, what is the difference between public, private, protected, and having no access modifier?
All my college years I have been using public , and would like to know the difference between public , private , and protected ?
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What is syntax for selector in CSS for next element?
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This is called the adjacent sibling selector, and it is represented by a plus sign...
h1.hc-reform + p {
clear:both;
}
Note: this is not supported in IE6 or older.
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Downloading MySQL dump from command line
...node because I don't have the Linux sysadmin skills necessary; before I complete the transition to a more noob-friendly service, I need to download the contents of a MySQL database. Is there a way I can do this from the command line?
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How to find the lowest common ancestor of two nodes in any binary tree?
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Nick Johnson is correct that a an O(n) time complexity algorithm is the best you can do if you have no parent pointers.) For a simple recursive version of that algorithm see the code in Kinding's post which runs in O(n) time.
But keep in mind that if your nodes have pare...