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Can I add a UNIQUE constraint to a PostgreSQL table, after it's already created?
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I needed an answer to this very question and started googling for the docs. Instead of the Postgres documentation, I ran into this topic at StackOverflow. So although it's a good think to reference the official docs, it's also very good to give the answer for future...
How to do ssh with a timeout in a script?
... is taking an infinite time to run, I want to come out of that ssh session and continue other lines in my sh script.
6 Answ...
Trying to fire the onload event on script tag
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can you help me understand why the ordering is important?
– chovy
Apr 26 '13 at 8:19
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SQLite: How do I save the result of a query as a CSV file?
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From here and d5e5's comment:
You'll have to switch the output to csv-mode and switch to file output.
sqlite> .mode csv
sqlite> .output test.csv
sqlite> select * from tbl1;
sqlite> .output stdout
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In a javascript array, how do I get the last 5 elements, excluding the first element?
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+1 simple and useful. Additionally I think last value (1) must be 0 to work, This arr.slice(Math.max(arr.length - 5, 0)) worked for me.
– QMaster
Nov 1 '14 at 21:41
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Ruby on Rails: getting the max value from a DB column
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Assuming your model name is Bar and it has a column named bar, this should work:
Bar.maximum("bar")
See the excellent Rails Guides section on Calculations for more info.
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How do I show an open file in eclipse Package Explorer?
...he Package Explorer view that looks like two yellow arrows pointed at left and right. The tooltip is "Link with Editor". Click that.
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How to add months to a date in JavaScript? [duplicate]
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Split your date into year, month, and day components then use Date:
var d = new Date(year, month, day);
d.setMonth(d.getMonth() + 8);
Date will take care of fixing the year.
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Refused to display in a frame because it set 'X-Frame-Options' to 'SAMEORIGIN'
...d a better solution, maybe it can help somebody
replace "watch?v=" by "v/" and it will work
var url = url.replace("watch?v=", "v/");
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Get the value of checked checkbox?
...ytes" because we must simply write document.getElementById("foo").value(); and "saving calculations" because getElementById is surely speedier than getElementsByTagName and a loop.
– Mageek
Jul 22 '12 at 11:20
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