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Rails: select unique values from a column
...TINCT, as it will return only the unique values. This is better because it means it returns less rows and should be slightly faster than returning a number of rows and then telling Rails to pick the unique values.
Model.select('DISTINCT rating')
Of course, this is provided your database understa...
Client-server synchronization pattern / algorithm?
...t. Then I added a cronjob to delete history items older than 90 days. This means users can still roll back changes less than 90 days old, and if they sync at least once every 90 days, the updates will be incremental as before. But if they wait longer than 90 days, the app will replace the entire dat...
Kill some processes by .exe file name
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Any option to kill a specific instance of a process? I mean, Contains("Spotify")) kills all the instances of Spotify. I want to kill a particular instance of Spotify.
– Banee Ishaque K
Feb 13 '18 at 5:17
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how to replicate pinterest.com's absolute div stacking layout [closed]
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How do you mean calculate the height of the column? How do you know how high it should be if you don't know the number and height of items within it? Any chance you could layout some pseudo code to demonstrate?
– M...
How can I use Google's Roboto font on a website?
...e fonts. I happen to be one of billion+ people for whom using Google's CDN means tons of websites fail to load properly, or at all. I'm not telling anyone what to do, but don't think Google's CDN is a perfect solution.
– Nateowami
Dec 29 '16 at 12:39
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What's the difference between lists enclosed by square brackets and parentheses in Python?
...quare brackets are lists while parentheses are tuples.
A list is mutable, meaning you can change its contents:
>>> x = [1,2]
>>> x.append(3)
>>> x
[1, 2, 3]
while tuples are not:
>>> x = (1,2)
>>> x
(1, 2)
>>> x.append(3)
Traceback (most rec...
Setting href attribute at runtime
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it probably means that your publish-link is a class rather than an id. try : alert($(".publish-link").attr("href")); instead
– jim tollan
Dec 3 '10 at 12:30
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How to overcome root domain CNAME restrictions?
...ng a root record is technically not against RFC, but does have limitations meaning it is a practice that is not recommended.
Normally your root record will have multiple entries. Say, 3 for your name servers and then one for an IP address.
Per RFC:
If a CNAME RR is present at a node, no other...
How to append to New Line in Node.js
... your application from lets say a windows environment to a linux one. that means if your application is appending logs using os.EOL you will have some lines ending with /r/n (from the time app was running on windows) and then you will have rows ending just with /n (when app runs on linux). This has ...
Unit Test? Integration Test? Regression Test? Acceptance Test?
... unit has been implemented or updating of a unit has been completed.
This means it's run whenever you've written a class/method, fixed a bug, changed functionality...
Integration Test
Integration test aims to test how well several units interact with each other. This type of test should be perform...