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Setting git parent pointer to a different parent

... Using git rebase. It's the generic "take commit(s) and plop it/them on a different parent (base)" command in Git. Some things to know, however: Since commit SHAs involve their parents, when you change the parent of a given commit, its SHA will change - as will the SHAs of ...
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Check if two linked lists merge. If so, where?

...wed" it was meant "you may change but in the end they should be restored", and we could iterate the lists exactly twice the following algorithm would be the solution. First, the numbers. Assume the first list is of length a+c and the second one is of length b+c, where c is the length of their co...
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Combining node.js and Python

... For communication between node.js and Python server, I would use Unix sockets if both processes run on the same server and TCP/IP sockets otherwise. For marshaling protocol I would take JSON or protocol buffer. If threaded Python shows up to be a bottleneck, ...
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What's the best way to set a single pixel in an HTML5 canvas?

... There are two best contenders: Create a 1×1 image data, set the color, and putImageData at the location: var id = myContext.createImageData(1,1); // only do this once per page var d = id.data; // only do this once per page d[0] = r; d[1] = g; d[2] = b; d[3] = a; ...
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Python argparse mutual exclusive group

...ns within the group mutually exclusive. What you're looking for is subcommands. Instead of prog [ -a xxxx | [-b yyy -c zzz]], you'd have: prog command 1 -a: ... command 2 -b: ... -c: ... To invoke with the first set of arguments: prog command_1 -a xxxx To invoke with the sec...
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How does LMAX's disruptor pattern work?

I am trying to understand the disruptor pattern . I have watched the InfoQ video and tried to read their paper. I understand there is a ring buffer involved, that it is initialized as an extremely large array to take advantage of cache locality, eliminate allocation of new memory. ...
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Upgrading Node.js to latest version

So, I have Node.js installed and now when I tried to install Mongoosejs I got an error telling me that I don't have the needed version of Node.js (I have v0.4.11 and v0.4.12 is needed). ...
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Compiling Java 7 code via Maven

...the mvn script in your maven installation to see how it's building the command. Perhaps you or someone else has hard-coded a JAVA_HOME in there and forgotten about it. share | improve this answer ...
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How to generate a random number between a and b in Ruby?

To generate a random number between 3 and 10, for example, I use: rand(8) + 3 8 Answers ...
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Cached, PHP generated Thumbnails load slowly

...ised by David got my bounty, albeit making my site only 3% faster overall, and while not answering the site's main bottleneck. Time for for clarification of my question, and, another bounty: ...