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How do I undo 'git add' before commit?

... If you type: git status Git will tell you what is staged, etc., including instructions on how to unstage: use "git reset HEAD <file>..." to unstage I find Git does a pretty good job of nudging me to do the right thing in situations like this. Note: Recent Git versions (1.8...
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Custom Adapter for List View

... } if (tt2 != null) { tt2.setText(p.getCategory().getId()); } if (tt3 != null) { tt3.setText(p.getDescription()); } } return v; } } This is a class I had used for my project. You need t...
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What's the difference between HEAD^ and HEAD~ in Git?

... the parent of the commit (~~ and ^^ both refer to the grandparent commit, etc.) But they differ in meaning when they are used with numbers: ~2 means up two levels in the hierarchy, via the first parent if a commit has more than one parent ^2 means the second parent where a commit has more than on...
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Does Python optimize tail recursion?

... functions, working in an interactive session rather than editing my code, etc.). Optimizing tail-recursion in Python is in fact quite easy. While it is said to be impossible or very tricky, I think it can be achieved with elegant, short and general solutions; I even think that most of these soluti...
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Initial bytes incorrect after Java AES/CBC decryption

...e, forgetting to convert to Base64, initialization vectors, character set, etc. So I thought of making a fully functional code. Hope this will be useful to you all: To compile you need additional Apache Commons Codec jar, which is available here: http://commons.apache.org/proper/commons-codec/downl...
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Best practices for SQL varchar column length [closed]

...e memory than you have to. This affects cache efficiency, sorting speed, etc. Basically, just come up with reasonable business constraints and error on a slightly larger size. As @onedaywhen pointed out, family names in UK are usually between 1-35 characters. If you decide to make it varchar(64)...
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How is a tag different from a branch in Git? Which should I use, here?

... each branch that you may want to recreate -- for delivery, bug diagnosis, etc. It's actually more complicated than this -- or as complicated as you want to make it -- but these examples should give you an idea of the differences. ...
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Retrieve specific commit from a remote Git repository

... Starting with Git version 2.5+ (Q2 2015), fetching a single commit (without cloning the full repo) is actually possible. See commit 68ee628 by Fredrik Medley (moroten), 21 May 2015. (Merged by Junio C Hamano -- gitster -- in commit a9d3493, 01 Jun 2015) You now ha...
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bool operator ++ and --

...R TRUE is TRUE, x OR FALSE is x, x AND FALSE is FALSE and x AND TRUE is x, etc using the same operators for boolean and bit-wise operations (since VB assumes twos-complement so -1 is all 1 bits). However, this can cause some strange bugs in VB if the coder doesn't catch that 2 (true) AND 4 (true) re...
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What is an example of the simplest possible Socket.io example?

...ke a few minutes depending on the speed of your network connection / CPU / etc. To check that everything went as planned, you can look at the package.json file again. $ cat package.json { "dependencies": { "express": "~4.9.8", "socket.io": "~1.1.0" } } Create a file called server.js ...