Marek Niepiekło niepiekm

Check that your system supports systemd

pidof systemd
2733

If this return a number then your system supports systemd. Most Linux distributions in 2017 support systemd.

Check out the proceses currently running.

Since systemd starts the process then all processes will be children of systemd

High-Performance Matrix Multiplication

This is a short post that explains how to write a high-performance matrix multiplication program on modern processors. In this tutorial I will use a single core of the Skylake-client CPU with AVX2, but the principles in this post also apply to other processors with different instruction sets (such as AVX512).

Intro

Matrix multiplication is a mathematical operation that defines the product of

Anti-tests

The requirement

Let's say we've been tasked with returning 400 when GET /users/<userId> is called with a negative userId.

The test

The requirement can be turned into a test that hits the endpoint with a negative userId and checks that a 400 is returned:

    @Test
    public void getUser_InvalidUserId_400() {

Table Of Content

Skip to the relevant sections if needed.

2-min tutorial to do it the quick-and-dirty-way
Concepts for resolving Git conflicts
Setting up different editors / tool for using git mergetool
- Finding out what mergetool editors are supported
mergetool simple code example for vimdiff
- Resolving conflict from a Git pull
Other great references and tutorials

One size doesn't fit all :) Submitted by Andrew Sowerby on Mon, 2016-02-15 13:44

Even if this isn't just a way of harvesting user details, which some reviewers seem to think it is, I can't see the point of this plugin.

You can achieve the same results by adjusting your -vmargs in the eclipse.ini, or in your shortcut or command line you use to start the application.

Just add adequate heap settings:

e.g. Xms1024m and Xmx1024m, or more, depending on how hard you push eclipse

[alias]

hist = log --pretty=format:'%h %ad | %s%d [%an]' --graph --date=short
st = status
co = checkout
br = branch
cm = commit
cma = commit -C HEAD --amend
rs = reset --soft
rh = reset HEAD

Print sorted and counted occurances of words in a file

$ cat commands | awk -F” ” ‘{print $4}’ | sort | uniq -c | sort -n

Print sorted and counted occurance of a 'word' in a file

cat some_commands | grep HINCRBY | awk ‘{print $5}’ | sort | uniq -c | sort -n

	# source: http://st-on-it.blogspot.com/2010/01/how-to-move-folders-between-git.html
	# First of all you need to have a clean clone of the source repository so we didn't screw the things up.

	git clone git://server.com/my-repo1.git

	# After that you need to do some preparations on the source repository, nuking all the entries except the folder you need to move. Use the following command

	git filter-branch --subdirectory-filter your_dir -- -- all

	# This will nuke all the other entries and their history, creating a clean git repository that contains only data and history from the directory you need. If you need to move several folders, you have to collect them in a single directory using the git mv command.

	# copied from http://gbayer.com/development/moving-files-from-one-git-repository-to-another-preserving-history/
	git clone <git repository A url> # clone source repository
	cd <git repository A directory>
	git remote rm origin # to make sure it doesn't affect the original repository
	git filter-branch --subdirectory-filter <directory 1> -- --all # remove all files other than the ones needed
	mkdir <directory 1> # move them into another directory where they will be stored in the destination repository (if needed)
	mv * <directory 1>
	git add .
	git commit

	## within current branch, squashes all commits that are ahead of master down into one
	## useful if you merged with upstream in the middle of your commits (rebase could get very ugly if this is the case)

	## commit any working changes on branch "mybranchname", then...
	git checkout master
	git checkout -b mybranchname_temp
	git merge --squash mybranchname
	git commit -am "Message describing all squashed commits"
	git branch -m mybranchname mybranchname_unsquashed
	git branch -m mybranchname