Marcel Akkerman akkerman

Linting your code, the vanilla way

You may want a linter plugin to lint your code in Vim but you probably don't need it. At least try the built-in way before jumping on the plugin bandwagon.

Defining `makeprg`

autocmd FileType <filetype> setlocal makeprg=<external command>

This autocommand tells Vim to use <external command> when invoking :make % in a <filetype> buffer. You can add as many similar lines as needed for other languages.

Creating your own ag.vim

Vim provides built-in mechanisms to search through projects in the form of the grep command. However, on large projects, grep is known to be slow; and hence people have been switching to simpler searchers like ack, and faster, parallel (metal?) searchers like ag and pt. Correspondingly, several plugins have been created that integrate these tools in vim: ack.vim, ag.vim, etc.

However, it's actually very easy to get the functionalities these plugins provide (faster search, results in quickfix-window, jumps, previews, and so on) in vanilla Vim itself; in fact, Vim already populates the grep-search results in a quickfix window. We just need to tell Vim to do the following things (use-case: ag):

Use ag as the default grep program
Open quickfix window by default
Create mappin

Vim: pushing built-in features beyond their limits

The situation

Searching can be an efficient way to navigate the current buffer.

The first search commands we learn are usually / and ?. These are seriously cool, especially with the incsearch option enabled which lets us keep typing to refine our search pattern. / and ? really shine when all we want is to jump to something we already have our eyeballs on but they are not fit for every situation:

when we want to search something that's not directly there, those two commands can make us lose context very quickly,
when we need to compare the matches.

Install PostGIS and GeoServer on Ubuntu 13.04

PostGIS installation

Postgresql

Install the server:

sudo apt-get install postgresql-9.1 postgresql-contrib-9.1 pgadmin3

Execute the psql command under user postgres (sudo -u postgres)
and connect to database postgres (psql postgres):

tmux cheatsheet

As configured in my dotfiles.

start new:

tmux

start new with session name:

	#!/bin/bash

	# Tom Hale, 2016. MIT Licence.
	# Print out 256 colours, with each number printed in its corresponding colour
	# See http://askubuntu.com/questions/821157/print-a-256-color-test-pattern-in-the-terminal/821163#821163

	set -eu # Fail on errors or undeclared variables

	printable_colours=256

	const I = x => x
	const K = x => y => x
	const A = f => x => f (x)
	const T = x => f => f (x)
	const W = f => x => f (x) (x)
	const C = f => y => x => f (x) (y)
	const B = f => g => x => f (g (x))
	const S = f => g => x => f (x) (g (x))
	const S_ = f => g => x => f (g (x)) (x)
	const S2 = f => g => h => x => f (g (x)) (h (x))

 <bean id="dataSource" class="org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy">
     <property name="targetDataSource">
         <bean class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
             <property name="driverClassName" value="org.h2.Driver" />
             <property name="url" value="jdbc:h2:~/workspace/h2/activiti;DB_CLOSE_ON_EXIT=FALSE;TRACE_LEVEL_FILE=4" />
             <property name="username" value="sa" />
             <property name="password" value="" />
         </bean>
     </property>
 </bean>