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How to set JAVA_HOME environment variable on Mac OS X 10.9?
...tility jenv to make it easy to setup on macOS.
Follow the instructions on https://github.com/hiddenswitch/jenv
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What's the difference between HEAD^ and HEAD~ in Git?
...D~ is well described by the illustration (by Jon Loeliger) found on http://www.kernel.org/pub/software/scm/git/docs/git-rev-parse.html.
This documentation can be a bit obscure to beginners so I've reproduced that illustration below:
G H I J
\ / \ /
D E F
\ | / \
\ | / ...
Scraping html tables into R data frames using the XML package
...rter try:
library(XML)
library(RCurl)
library(rlist)
theurl <- getURL("https://en.wikipedia.org/wiki/Brazil_national_football_team",.opts = list(ssl.verifypeer = FALSE) )
tables <- readHTMLTable(theurl)
tables <- list.clean(tables, fun = is.null, recursive = FALSE)
n.rows <- unlist(lapp...
Rails ActiveRecord date between
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Rails 5.1 introduced a new date helper method all_day, see: https://github.com/rails/rails/pull/24930
>> Date.today.all_day
=> Wed, 26 Jul 2017 00:00:00 UTC +00:00..Wed, 26 Jul 2017 23:59:59 UTC +00:00
If you are using Rails 5.1, the query would look like:
Comment.where(...
How to resolve : Can not find the tag library descriptor for “http://java.sun.com/jsp/jstl/core” [du
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In my case, I hard-coded it to use "https" instead of "http"... #facepalm
– Yom S.
Apr 2 '18 at 8:14
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When deleting remote git branch “error: unable to push to unqualified destination”
... went to this discussion, however I couldn't solve the problem until I saw https://stackoverflow.com/a/32147743/4209849.
which simply add a tip on distinguishing origin/my-branch-name and my-branch-name.
To be specific, I should use:
git push origin :my_remote_branch
instead of
git push orig...
Android NDK C++ JNI (no implementation found for native…)
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There is a cpp example under apps in ndk:
https://github.com/android/ndk-samples/blob/master/hello-gl2/app/src/main/cpp/gl_code.cpp
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How can I autoformat/indent C code in vim?
... lets you format your buffer (or buffer selections) with a single command: https://github.com/Chiel92/vim-autoformat. It uses external format programs for that, with a fallback to vim's indentation functionality.
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Create a List of primitive int?
...ike an arraylist, except it can hold primitive int.
More details here -
https://commons.apache.org/dormant/commons-primitives/apidocs/org/apache/commons/collections/primitives/ArrayIntList.html
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Get names of all keys in the collection
...ion, I created an open source tool called Variety which does exactly this: https://github.com/variety/variety
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