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Querying DynamoDB by date
...think of partition keys as creating a new table for each user or customer, etc...).
Queries can only be done in a single partition. That's really the end of the story. This means if you want to query by date (you'll want to use msec since epoch), then all the items you want to retrieve in a single...
Parsing XML with namespace in Python via 'ElementTree'
...u're dealing with big and complex xml files so that that sub-sub-elements (etc.) are also included.
If you know yourself where elements are in your xml, then I suppose it'll be fine! Just thought this was worth remembering.
root.iter()
ref: https://docs.python.org/3/library/xml.etree.elementtree....
How do I edit /etc/sudoers from a script?
I need to edit /etc/sudoers from a script to add/remove stuff from white lists.
12 Answers
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When splitting an empty string in Python, why does split() return an empty list while split('\n') re
... tries to be clever. It splits on any whitespace, tabs, spaces, line feeds etc, and it also skips all empty strings as a result of this.
>>> " fii fbar \n bopp ".split()
['fii', 'fbar', 'bopp']
Essentially, .split() without parameters are used to extract words from a string, as oppos...
How do I rename the extension for a bunch of files?
...h, there's no need for external commands like sed, basename, rename, expr, etc.
for file in *.html
do
mv "$file" "${file%.html}.txt"
done
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Creating a config file in PHP
... comment - none of the parsing mechanisms would be the fastest (ini, json, etc) - but they're also not the parts of your application that you'd really need to focus on optimizing since the speed difference would be negligible on such small files.
...
Return XML from a controller's action in as an ActionResult?
...s in my project root for every kind of classes: Results, Filters, Routing, etc.
– Anthony Serdyukov
Apr 6 '10 at 2:32
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“From View Controller” disappears using UIViewControllerContextTransitioning
...r *)viewControllerForKey:(NSString *)key;
So instead of adjusting frames etc of toViewController.view, use the return value of [transitionContext viewForKey:UITransitionContextToViewKey].
If your app needs to support iOS7 and/or Xcode 5, then you can use a simple category method on UIViewControll...
RESTful Authentication
...ch is very user-unfriendly. you cannot add password retrieval, help boxes, etcetera.
logging out or logging in under a different name is a problem - browsers will keep sending authentication information to the site until you close the window
timeouts are difficult
A very insightful article that ta...
What does “./bin/www” do in Express 4.x?
...
Ultimately, you could have different scripts like test, stop, or restart, etc. Having this structure allows you to have different startup configurations, without cramming everything into app.js.
The correct way to start your Express app is:
npm start
To deploy an Express 4.x app to Heroku, add...