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generate model using user:references vs user_id:integer
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3 Answers
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Convert an enum to List
...r learnings.
– Jeremy Thompson
Sep 23 '14 at 9:16
It seems Enum.GetNames(typeof(DataSourceTypes)) return a generic Sys...
How to load a tsv file into a Pandas DataFrame?
...ion that appears to do what you want:
DataFrame.from_csv('c:/~/trainSetRel3.txt', sep='\t')
If you have a header, you can pass header=0.
DataFrame.from_csv('c:/~/trainSetRel3.txt', sep='\t', header=0)
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Convert one date format into another in PHP
...However, even strtotime() doesn't recognize the y-m-d-h-i-s format.
PHP 5.3 and up
Use DateTime::createFromFormat. It allows you to specify an exact mask - using the date() syntax - to parse incoming string dates with.
PHP 5.2 and lower
You will have to parse the elements (year, month, day, hour...
Is there a way to 'uniq' by column?
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335
sort -u -t, -k1,1 file
-u for unique
-t, so comma is the delimiter
-k1,1 for the key field ...
Difference between DateTime and Time in Ruby
...In versions prior to Ruby 1.9 and on many systems Time is represented as a 32-bit signed value describing the number of seconds since January 1, 1970 UTC, a thin wrapper around a POSIX-standard time_t value, and is bounded:
Time.at(0x7FFFFFFF)
# => Mon Jan 18 22:14:07 -0500 2038
Time.at(-0x7FFFF...
Converting a date string to a DateTime object using Joda Time library
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483
Use DateTimeFormat:
DateTimeFormatter formatter = DateTimeFormat.forPattern("dd/MM/yyyy HH:mm:s...
Why shouldn't Java enum literals be able to have generic type parameters?
Java enums are great. So are generics. Of course we all know the limitations of the latter because of type erasure. But there is one thing I don't understand, Why can't I create an enum like this:
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Why would someone use WHERE 1=1 AND in a SQL clause?
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348
If the list of conditions is not known at compile time and is instead built at run time, you d...
Replace all whitespace characters
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321
You want \s
Matches a single white space
character, including space, tab, form
feed, l...