Copy a files content into the clipboard - command line

xclip -sel clip < ~/.ssh/id_rsa.pub

Getting started with grails Quartz jobs

Quick start in grails jobs using the grails Quartz plugin

   class MyJob {
       def grailsApplication

       def execute(context) {
               def myService = grailsApplication.mainContext.myService
               def domainInstance = MyDomain.get(context.mergedJobDataMap.get('domainId'))
       }
   }

Using HTML data attributes

For those who have always been hearing about data attributes and have never actually understood how to use them. Here is an article to help you get a start on using them

https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/Using_data_attributes

How to start your grails integration tests

I always keep forgetting how to start writing my grails integration tests. I hope this helps someone

class TestISpec extends grails.plugin.spock.IntegrationSpec {
     def 'this should do that'() {}
}

Getting unique commits in a branch ..well almost

To list unique commits in a branch

git log --first-parent --no-merges

For more details checkout http://stackoverflow.com/questions/5720343/using-git-show-all-commits-that-exist-only-on-one-specific-branch-and-not-a
Then you can format the output as follows

git log --first-parent --no-merges --pretty=format:"%H %s"

Then you get something like

3d6995f61c1359e44c98433bb5ed4251798002c3 My Commit

Set Properties File with SED

get unix command exit code

Extract value from string in groovy

Get all tables that have a certain field

select table_name from columns where table_schema = 'mydatabase' and column_name = 'looking_for_this_field';

NoClassDefFoundError

NoClassDefFoundError in Java comes when Java Virtual Machine is not able to find a particular class at runtime which was available during compile time.

Read more: http://javarevisited.blogspot.com/2011/06/noclassdeffounderror-exception-in.html#ixzz2x8LeYeww

Ignore files for CtrlP vim

set wildignore+=*/tmp/*,*.so,*.swp,*.zip

Setting the background color on a android TextView

Extract value from string using regex in java

So suppose you want to extract values from a string based on a certain regex pattern. The thing that i didn't know was that I needed to use () around the data I wanted to capture.


Output

http://home.com
56

I dedicate this post to all laymen out there, who get confused with coding and stuff

Listen for text changes on EditText

Assume you want to enable a button only if some changes have been made to a form. You can do this by using android.text.TextWatcher
Simply create a new instance of TextWatcher and implement the required methods
There you have it. For more info checkout http://developer.android.com/reference/android/text/TextWatcher.html

The magic of grep and sed and xargs

You want to get all files that have a certain string

grep -rl "ToMatch" <folder>

You then want to replace that string with another string

grep -rl "ToMatch" | xargs sed -i s/ToMatch/Replaced/g

The xargs command passes the values from "grep -rl "ToMatch" <folder>" to the sed command as arguments

For more info on how to use xargs look at http://unixhelp.ed.ac.uk/CGI/man-cgi?xargs

Delete values from a map through a loop

So you woke up today and you want to delete values from a map, as you loop through the map (For whatever reason). So you right this is groovy

Code
Output

[a,b,c]

Wrong !!!!
You actually get a ConcurrentModificationException.... hahaha :D <- This is me laughing at you. So you need to

Java String.equals versus == [duplicate]

String.equals("some string") checks the contents of the string
"==" checks if the object references are identical

View Logs of CRON jobs

grep CRON /var/log/syslog