Sending mail in unix with attachment

You would need to install sharutils

sudo apt-get install sharutils

Then run this

uuencode <path_to_file> <name_to_give_attachment> | mail -s "Subject" foo@example.com

Also see http://soamweird.blogspot.com/2016/03/sending-mail-in-unix.html

Sorting by type first then alphabetically

The script below ensures that items are sorted by type first then by alphabetical order.

	def list = [
	[type:"error", value:"yellow"],
	[type:"normal", value:"zippy"],
	[type:"normal", value:"awesome"],
	[type:"error", value:"big"],
	]
	list.sort { a, b ->
	if (a.type.equals("error") != b.type.equals("error")) {
	return b.type.equals("error") <=> a.type.equals("error")
	} else {
	return a.value <=> b.value
	}
	}
	return list​

view raw sortByTypeTheAlphabetically.groovy hosted with ❤ by GitHub

The spaceship operator

Just ran into this and I thought it was really cool.

So the spaceship operator (<=>) delegates to the compareTo method:

assert (1 <=> 1) == 0
assert (1 <=> 2) == -1
assert (2 <=> 1) == 1
assert ('a' <=> 'z') == -1

For more checkout http://groovy-lang.org/operators.html

Sending mail in unix

When sending an email from unix do the following

echo "Mail Message" | mail -s "Subject" person@home.com

In order to avoid getting your email marked as spam, ensure that the sending email is something realistic, probably a domain you own i.e. awesome@homelypeople.com

Reset local git branch to match remote

Setting your branch to exactly match the remote branch can be done in two steps:

git fetch origin
git reset --hard origin/master

Deleting git tags

Delete tag locally

git tag -d tagName

Delete tag on remote

git push --delete origin tagName

jquery ajax timeout

When making an ajax request, it seems that jQuery only sets the timeout when the timeout property in the $.ajax call is defined.

You can see that from here https://github.com/jquery/jquery/blob/master/src/ajax.js#L684

Here is an excerpt from http://api.jquery.com/jquery.ajax/#timeout

Set a timeout (in milliseconds) for the request. This will override any global timeout set with $.ajaxSetup(). The timeout period starts at the point the $.ajax call is made; if several other requests are in progress and the browser has no connections available, it is possible for a request to time out before it can be sent. In jQuery 1.4.x and below, the XMLHttpRequest object will be in an invalid state if the request times out; accessing any object members may throw an exception. In Firefox 3.0+ only, script and JSONP requests cannot be cancelled by a timeout; the script will run even if it arrives after the timeout period.

get autocomplete for git on mac os

Weird thing, I installed git for mac and i did not get autocomplete for git.

To fix this I followed this instructions http://www.codethatmatters.com/2010/01/git-autocomplete-in-mac-os-x/

Error starting mysql on mac os after installing with homebrew

I just recently got a mac. I then learnt that I needed to install stuff with homebrew. But after installing mysql via homebrew, I could not get it to work.

Then i read in stackoverflow.com that deleting the error file fixes the startup problem I was having.

The file I deleted is this

usr/local/var/mysql/MacBook-Air.local.err

Confine metaClass changes to a specific test class or test method in grails

@ConfineMetaClassChanges([StatisticsService])
StatisticsServiceIntegrationTest extends IntegrationSpec {
    StatisticsService statisticsService
    void "count login to private area"() {
        setup:
            def user = new User(statistics: new UserStatistics())
            statisticsService.metaClass.getCurrentUser = { -> user }
        when:
            statisticsService.countLoginPA()
        then:
            user.statistics.logins == 1
    }    
}

http://spockframework.github.io/spock/javadoc/1.0/spock/util/mop/ConfineMetaClassChanges.html

Reset last local git commit

git reset HEAD~1