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How to delete the last n commits on Github and locally?
I'm trying to delete the last 2 commits from one of my GitHub repositories. I've tried as suggested here : git push -f origin HEAD^^:master . It seems that it works, as the last two commits are removed.
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Why does Java's Arrays.sort method use two different sorting algorithms for different types?
Java 6's Arrays.sort method uses Quicksort for arrays of primitives and merge sort for arrays of objects. I believe that most of time Quicksort is faster than merge sort and costs less memory. My experiments support that, although both algorithms are O(n log(n)). So why are different algorithms us...
Python csv string to array
Anyone know of a simple library or function to parse a csv encoded string and turn it into an array or dictionary?
10 Answe...
Fast way to discover the row count of a table in PostgreSQL
I need to know the number of rows in a table to calculate a percentage. If the total count is greater than some predefined constant, I will use the constant value. Otherwise, I will use the actual number of rows.
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Equation (expression) parser with precedence?
I've developed an equation parser using a simple stack algorithm that will handle binary (+, -, |, &, *, /, etc) operators, unary (!) operators, and parenthesis.
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How many levels of pointers can we have?
How many pointers ( * ) are allowed in a single variable?
14 Answers
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Is SHA-1 secure for password storage?
Conclusion: SHA-1 is as safe as anything against preimage attacks, however it is easy to compute, which means it is easier to mount a bruteforce or dictionary attack. (The same is true for successors like SHA-256.) Depending on the circumstances, a hash function which was designed to be computation...
PHP code to convert a MySQL query to CSV [closed]
What is the most efficient way to convert a MySQL query to CSV in PHP please?
6 Answers
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Simplest way to detect a mobile device in PHP
What is the simplest way to tell if a user is using a mobile device to browse my site using PHP?
15 Answers
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Is there a ceiling equivalent of // operator in Python?
I found out about the // operator in Python which in Python 3 does division with floor.
7 Answers
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