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Postgresql aggregate array
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Use array_agg: http://www.sqlfiddle.com/#!1/5099e/1
SELECT s.name, array_agg(g.Mark) as marks
FROM student s
LEFT JOIN Grade g ON g.Student_id = s.Id
GROUP BY s.Id
By the way, if you are using Postgres 9.1, you don't need to repeat...
Creating anonymous objects in php
As we know, creating anonymous objects in JavaScript is easy, like the code below:
12 Answers
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Is there any way to put malicious code into a regular expression?
I want to add regular expression search capability to my public web page. Other than HTML encoding the output, do I need to do anything to guard against malicious user input?
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How to check if command line tools is installed
I have a macbook pro with OS X 10.8.2.
XCode is installed. I know this as it appears in the Applications directory.
There are also the xcodebuild and xcode-select files in /usr/bin
I need to know if the command line tools is installed.
Is there a command for it?
What can I do to see if XCode CLT is ...
git selective revert local changes from a file
In my git repo which is tracking a svn repo I have made a number of edits to a single file.
6 Answers
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Is there an equivalent to CTRL+C in IPython Notebook in Firefox to break cells that are running?
I've started to use the IPython Notebook and am enjoying it. Sometimes, I write buggy code that takes massive memory requirements or has an infinite loop. I find the "interrupt kernel" option sluggish or unreliable, and sometimes I have to restart the kernel, losing everything in memory.
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How do I remove a single file from the staging area (undo git add)?
Situation: I have a Git repository with files already in the index. I make changes to several files, open Git and add these files to my staging area with "git add ."
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Looping a video with AVFoundation AVPlayer?
Is there a relatively easy way of looping a video in AVFoundation?
17 Answers
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Git: How to edit/reword a merge commit's message?
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If you add the --preserve-merges option (or its synonym, -p) to the git rebase -i command then git will try to preserve the merges when rebasing, rather than linearizing the history, and you should be able to amend the merge commits as well:
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How to Deep clone in javascript
How do you deep clone a Javascript object?
19 Answers
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