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Ways to implement data versioning in MongoDB
...o by keeping the history out of the object you can also keep it out of the commonly accessed memory when that data is queried.
To make my life easy, I would make a history document contain a dictionary of time-stamped diffs. Something like this:
{
_id : "id of address book record",
changes...
jQuery duplicate DIV into another DIV
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@KNU It's not necessary but it's a common convention in the jQuery world. It indicates that the $button variable is a jQuery object. See stackoverflow.com/questions/205853/…
– chrx
Nov 7 '15 at 21:20
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How to attach file to a github issue?
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You upload it somewhere and add the link in a comment. GitHub's Issues is rather primitive and doesn't allow attaching files.
Update: You can post images to GitHub issues now. The easiest way is to copy the image (right click, Copy image) and then paste it into the tex...
How to switch a user per task or set of tasks?
...urring theme that's in my ansible playbooks is that I often must execute a command with sudo privileges ( sudo: yes ) because I'd like to do it for a certain user. Ideally I'd much rather use sudo to switch to that user and execute the commands normally. Because then I won't have to do my usual post...
Using app.configure in express
...xample, the two piece of codes have no difference at all.
http://expressjs.com/api.html#app.configure
Update 2015:
@IlanFrumer points out that app.configure is removed in Express 4.x. If you followed some outdated tutorials and wondering why it didn't work, You should remove app.configure(function...
Using scp to copy a file to Amazon EC2 instance?
...zonKey.pem phpMyAdmin-3.4.5-all-languages.tar.gz ec2-user@mec2-50-17-16-67.compute-1.amazonaws.com:~/.
See Connecting to Linux/UNIX Instances Using SSH.
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How to edit a node module installed via npm?
...m the original source.
To install directly from github, use the following command:
npm install https://github.com/<username>/<repository>/tarball/master
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What's the difference between a proxy server and a reverse proxy server? [closed]
..." describes someone or something acting on behalf of someone else.
In the computer realm, we are talking about one server acting on the behalf of another computer.
For the purposes of accessibility, I will limit my discussion to web proxies - however, the idea of a proxy is not limited to websites...
Using .otf fonts on web browsers
....otf") format("opentype");
}
// Edit: OTF now works in most browsers, see comments
However if you want to support a wide variety of browsers i would recommend you to switch to WOFF and TTF font types. WOFF type is implemented by every major desktop browser, while the TTF type is a fallback for olde...
How do I check for a network connection?
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That is not reliable. read stackoverflow.com/a/25779403/2377343
– T.Todua
Sep 9 '19 at 11:17
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