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Delete empty lines using sed
...d` => delete lines which may contain white space
This covers all the bases and works perfectly for my needs. Kudos to the original posters @Kent and @kev
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Command to get time in milliseconds
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date +%s%3N is faster (based in @michael-defort's answer)
– caligari
Feb 21 '14 at 8:08
11
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Java using enum with switch statement
... the enum name in String.
.ordinal() allow you to get the integer value, 0-based.
You can attach other value parameters with each enum.
and, of course, switch enabled.
enum with value parameters:
enum StateEnum {
UNDEFINED_POLL ( 1 * 1000L, 4 * 1000L),
SUPPORT_POLL (...
Pass ruby script file to rails console
...2:-$PWD}')";}
Example:
cd ~/rails_project/app/helpers
rr my_script.rb
Based on @moritz's answer here. I changed it, since the working directory for File.read is the Rails project root.
I know this is some serious heresy, using python to help a ruby script. But I couldn't find a relpath method ...
Smooth scroll to div id jQuery
I've been trying to get a scroll to div id jquery code to work correctly. Based on another stack overflow question i tried the following
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Get current date/time in seconds
...t time and a time stamp from a previous time that had been stored in a database say when a user posted something. In the event you'd like to get a formatted time like 'October 22nd, 2015' you can craft your own function to return that from a timestamp as an argument or use one already here at Stack....
Looking for simple Java in-memory cache [closed]
...hing library. Caffeine is a high performance, near optimal caching library based on Java 8. Caffeine provides an in-memory cache using a Google Guava inspired API
– Slavus
Apr 16 at 6:19
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How do you create a Distinct query in HQL
... That's suboptimal: instead of discarding the repetitions at the database level, it will just pull the data from the database to the memory with repetitions and all, and then discard the repetitions afterwards; depending on how often the data repeats, that can increase the I/O operations quite...
Converting BigDecimal to Integer
...s the wrong answer.
Making it better
Let's use the following assumptions based on the other answers.
We are okay with losing precision and truncating the value because that's what intValueExact() and auto-boxing do
We want an exception thrown when the BigDecimal is larger than the Integer range ...
Extracting specific columns from a data frame
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This doesn't use dplyr. It uses base::subset, and is identical to Stephane Laurent's answer except that you use column numbers instead of column names.
– Gregor Thomas
Oct 12 '17 at 18:16
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