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Which Java Collection should I use?
...like synchronized access, thread safety etc or the legacy collections, but it does cover the 3 standard Sets, 3 standard Maps and 2 standard Lists.
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How to generate all permutations of a list?
...
Starting with Python 2.6 (and if you're on Python 3) you have a standard-library tool for this: itertools.permutations.
import itertools
list(itertools.permutations([1, 2, 3]))
If you're using an older Python (<2.6) for some re...
How to version control a record in a database
... a FOO table that admins and users can update. Most of the time you can write queries against the FOO table. Happy days.
Then, I would create a FOO_HISTORY table. This has all the columns of the FOO table. The primary key is the same as FOO plus a RevisionNumber column. There is a foreign key ...
ExecJS and could not find a JavaScript runtime
...sers
I'm on Ubuntu 11.04 and had similar issues. Installing Node.js fixed it.
As of Ubuntu 13.04 x64 you only need to run:
sudo apt-get install nodejs
This will solve the problem.
CentOS/RedHat Users
sudo yum install nodejs
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Check if one list contains element from the other
I have two lists with different objects in them.
12 Answers
12
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How to pass parameters in $ajax POST?
...parameters, but if I set them directly to the url using /?field1="hello" it works.
9 Answers
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SQL Server: Difference between PARTITION BY and GROUP BY
...e years. Recently, I've been reverse-engineering some code that uses PARTITION BY to perform aggregations. In reading through all the documentation I can find about PARTITION BY , it sounds a lot like GROUP BY , maybe with a little extra functionality added in? Are they two versions of the sa...
Converting BigDecimal to Integer
...Decimal.
I have another API method to which I need to pass that number but it accepts Integer as parameter. I cannot change return types or variable types of both methods.
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What is the best way to uninstall gems from a rails3 project?
...installed. I've looked at the bundler help file and, so far as I can tell, it does not have a way to uninstall gems.
7 Ans...
How to add minutes to my Date
...e using mm. You should use MM. MM is for month and mm is for minutes. Try with yyyy-MM-dd HH:mm
Other approach:
It can be as simple as this (other option is to use joda-time)
static final long ONE_MINUTE_IN_MILLIS=60000;//millisecs
Calendar date = Calendar.getInstance();
long t= date.getTimeIn...