Alex Arriaga

alex-arriaga May 12, 2014

How to delete a remote Git tag

If some day for any reason you want to remove a tag because maybe you make a mistake and you want to move your Git tag to another commit, then you are going to need:

Delete the tag from local repository
Remove the tag in the remote repository

For doing these operations, just execute next commands:

// Delete tag "1.3.0" from local
git tag -d 1.3.0

// Delete tag in remote (synchronizing)
git push origin :refs/tags/1.3.0

// Delete tag "1.3.0" from local

git tag -d 1.3.0

// Delete tag in remote (synchronizing)

git push origin :refs/tags/1.3.0

BTW, maybe you find this list of Git commands useful for your work: x

That’s it!

Be happy with your repo!

alex-arriaga May 6, 2014

Some online editors for Markdown syntax

Git, Web Development No Reply

If you have worked with Github and you have created some Github pages probably “markdown syntax” is part of your daily work. This great language was created by John Gruber and Aaron Swartz and used in many systems like Github, Atlassian Bitbucket, Atlassian Stash, etc. the nice thing about this language is that it is really simple and light. But, sometimes is difficult to imagine what is going to be the result of a particular statement. So, in order to have a preview of your small Markdown documents, you can use an online viewer, next is a list of them (the order is my own preference):

If you want to know more about Markdown, please visit next links:

That’s it for today!

Be happy with your code!

alex-arriaga May 6, 2014

Session 6: jQuery for the real world (in spanish)

jQuery, Web Development No Reply

Would you like to improve your skills in Ajax calls and communicate jQuery with other frameworks like CakePHP?, well if you answered yes, this post is definitely for you. This is the sixth and last video of the first part of an initiative related with jQuery that I have named jQuery for the real world. All code and practices can be downloaded from my Github profile: https://github.com/alex-arriaga/jquery-para-el-mundo-real or if you only want to obtain a compressed copy you can use this Github page: http://alex-arriaga.github.io/jquery-para-el-mundo-real/

In this session we will see:

Inserting data into a database by using an Ajax call
Method load()
Creating html selects dynamically (database’s query + generation)
Multiple Ajax calls (chaining)
Using Bootstrap JS to display modal messages

alex-arriaga May 6, 2014

How to rename files recursively deleting white spaces in file names with shell script

GNU/Linux, Mac OSX, Operating Systems No Reply

Hi!

Today, I would like to share a small script (in shell) to rename files recursively but replacing white spaces in the files’ names. For this task I have only used standard commands in order to be sure this script will work on any GNU/Linux or UNIX-like operating system (mv, sed, find,..). Enjoy and personalize this script as you need!

# Finding all files in a directory and its children
path_to_images="/Users/alex/Downloads/images"

find $path_to_images -type f -name *.jpg -follow |
while read -r file;
do
	file_name="${file##*/}"
	directory=$(dirname "$file")

	# Delete all the whitespaces in file name using sed
	new_file_name=$(echo $file_name | sed 's/ /-/g')
	new_path=$directory'/'$new_file_name
	mv "$file" "$new_path";
	echo "Renamed: $new_path"
done

# Finding all files in a directory and its children

path_to_images="/Users/alex/Downloads/images"

find $path_to_images -type f -name *.jpg -follow |

while read -r file;

file_name="${file##*/}"

directory=$(dirname "$file")

# Delete all the whitespaces in file name using sed

new_file_name=$(echo $file_name | sed 's/ /-/g')

new_path=$directory'/'$new_file_name

mv "$file" "$new_path";

echo "Renamed: $new_path"

done

Most important lines are:

find $path_to_images -type f -name *.jpg -follow

1	find $path_to_images -type f -name *.jpg -follow

Which obtains all the files with .jpg extension starting from $path_to_images, and these other lines:

new_file_name=$(echo $file_name | sed 's/ /-/g')
new_path=$directory'/'$new_file_name

1 2	new_file_name=$(echo $file_name \| sed 's/ /-/g') new_path=$directory'/'$new_file_name

Which replace all white spaces for a dash “-“, in the current $file_name and then by using the mv command the renaming operation is executed.

That’s it!

Be happy with your code!

alex-arriaga April 20, 2014

“Error in exception handler” in first installation of Laravel framework – SOLVED

Laravel, PHP, Web Development 5 Replies

Last week, I started to learn how to Lavarel 4 works in order to compare it with other frameworks that I know like: CakePHP and CodeIgniter. First thing that I loved about Laravel is that it works with PHP Composer, that is a great point for Laravel.

But well, after running my first installation of this framework I obtained and error, which I explain in following lines:

Problem

I was getting this error:

Error in exception handler.

1	Error in exception handler.

Sometimes the error you are looking for is hidden behind the scenes, so you will need to drill down to figure out what is the actual problem, that is so important: remember the right way to solve something is, first of all, knowing what you are trying to solve…

Trying to find the “real” problem to give a solution

Go to app/config/app.php
Modify line to enable debug mode: ‘debug’ => true,
In my case there was a problem with permissions to create log files (laravel.log)

Error in exception handler: The stream or file "/Applications/XAMPP/xamppfiles/htdocs/projects/laravel/first/app/storage/logs/laravel.log" could not be opened: failed to open stream: Permission denied in /Applications/XAMPP/xamppfiles/htdocs/projects/laravel/first/bootstrap/compiled.php:8419

1	Error in exception handler: The stream or file "/Applications/XAMPP/xamppfiles/htdocs/projects/laravel/first/app/storage/logs/laravel.log" could not be opened: failed to open stream: Permission denied in /Applications/XAMPP/xamppfiles/htdocs/projects/laravel/first/bootstrap/compiled.php:8419

After that, I received a new exception:

file_put_contents(/Applications/XAMPP/xamppfiles/htdocs/projects/laravel/first/app/storage/sessions/7b1ba46df9eaa9ca22a5c5cd1529956266a30c32): failed to open stream: Permission denied

1	file_put_contents(/Applications/XAMPP/xamppfiles/htdocs/projects/laravel/first/app/storage/sessions/7b1ba46df9eaa9ca22a5c5cd1529956266a30c32): failed to open stream: Permission denied

This is clearly an error with permissions to write inside of app/storage/sessions, so a simple chmod command solved that.

You can find more information about Laravel error and logs in this link: http://laravel.com/docs/errors

And that’s it!

Be happy with your code!

alex-arriaga April 20, 2014

Open directories with Sublime Text 2 using the command line (Mac OSX)

Mac OSX, Operating Systems 1 Reply

What about this: imagine if you could open your great Sublime Text 2 editor in a specific directory from the command line, well, today, I would like to share you the easiest way to configure that useful task in your Mac OSX. It is really simple, it just a matter of creating a symbolic link (a kind of direct access) to the subl executable.

Next line do the task for you:

sudo ln -s "/Applications/Sublime Text 2.app/Contents/SharedSupport/bin/subl" /usr/local/bin/subl

1	sudo ln -s "/Applications/Sublime Text 2.app/Contents/SharedSupport/bin/subl" /usr/local/bin/subl

Once you have created the symbolic link, open a Terminal and run following command:

> subl directory_to_open
// Example: open my Desktop folder in Sublime Text 2
> subl /Users/alex/Desktop

> subl directory_to_open

// Example: open my Desktop folder in Sublime Text 2

> subl /Users/alex/Desktop

That’s it! Now you can open any directory using the command line.

alex-arriaga April 10, 2014

How to check SHA1 digest in Mac OS X

Mac OSX, Operating Systems No Reply

Hi!
Today, I just want to share you an easy way to check the SHA1 digest using a the terminal in Mac OSX. This command is really useful when you need to know if any file -for example an ISO- was downloaded correctly.

Step 1. Open a terminal.
Step 2. Type next command and wait for the digest

openssl sha1 your_file

1	openssl sha1 your_file

For example, I downloaded Kali Linux (the new distribution for penetration and security testing, :p)

openssl sha1 kali-linux-1.0.6-i386.iso

1	openssl sha1 kali-linux-1.0.6-i386.iso

Step 3. After running previous command, you will see:

SHA1(kali-linux-1.0.6-i386.iso)= 518aad75c2c5f1c60b2068760712f7e82c02d703

1	SHA1(kali-linux-1.0.6-i386.iso)= 518aad75c2c5f1c60b2068760712f7e82c02d703

That’s it!

Be happy with your SHA1 digest 🙂

alex-arriaga April 10, 2014

How to allow publishing of JavaEE applications with “errors” in IBM Rational® Software Architect

Enterprise Development, IBM Web Content Manager, IBM WebSphere, Java EE No Reply

The problem

Sometimes, you are creating pieces of software with many tags in HTML, JavaScript or any other front-end language that IBM Rational® Software Architect doesn’t recognize, for example today I was publishing a theme for WebSphere Portal 8 and an error started to happen in the publishing operation, in a nutshell it was about my theme had some <div></div> tags and IBM Rational® Software Architect wasn’t able to mark them as valid.

Solution

If you are pretty sure your code is ok, and the error is just because IBM Rational® Software Architect doesn’t have support for some tags, then you will only need to say “Hey Rational allow me to publish my stuff!”,

Go to menu Window > Preferences > Server > WebSphere Application Server
Look for Allow applications containing errors to be published on a server
See following image for more details about it:

That’s it!

Be happy with your code!

alex-arriaga April 9, 2014

CakePHP Database connection “Mysql” is missing, or could not be created in CakePHP Console SOLVED

CakePHP, Databases, Mac OSX, MySQL, Operating Systems, PHP, Web Development No Reply

Today, I spent some time helping a partner of mine trying to figure out how to enable and use the CakePHP console in Mac OS + XAMPP (Mac OS version of course), so, after searching on the internet what was going on, I realized there was a problem with the unix_socket for MySQL because Mac OS didn’t recognize this parameter automatically, so here is how I solved this issue, I hope this help you a lot.

Problem

CakePHP Database connection “Mysql” is missing, or could not be created

1	CakePHP Database connection “Mysql” is missing, or could not be created

Error: Database connection "Mysql" is missing, or could not be created.
#0 /Applications/XAMPP/xamppfiles/htdocs/projects/site/lib/Cake/Model/Datasource/DboSource.php(260): Mysql->connect()
#1 /Applications/XAMPP/xamppfiles/htdocs/projects/site/lib/Cake/Model/ConnectionManager.php(105): DboSource->__construct(Array)
#2 /Applications/XAMPP/xamppfiles/htdocs/projects/site/lib/Cake/Console/Command/Task/ModelTask.php(927): ConnectionManager::getDataSource('default')
#3 /Applications/XAMPP/xamppfiles/htdocs/projects/site/lib/Cake/Console/Command/Task/ModelTask.php(864): ModelTask->getAllTables('default')
#4 /Applications/XAMPP/xamppfiles/htdocs/projects/site/lib/Cake/Console/Command/Task/ModelTask.php(954): ModelTask->listAll('default')
#5 /Applications/XAMPP/xamppfiles/htdocs/projects/site/lib/Cake/Console/Command/BakeShell.php(150): ModelTask->getName('default')
#6 /Applications/XAMPP/xamppfiles/htdocs/projects/site/lib/Cake/Console/Shell.php(437): BakeShell->all()
#7 /Applications/XAMPP/xamppfiles/htdocs/projects/site/lib/Cake/Console/ShellDispatcher.php(207): Shell->runCommand('all', Array)
#8 /Applications/XAMPP/xamppfiles/htdocs/projects/site/lib/Cake/Console/ShellDispatcher.php(66): ShellDispatcher->dispatch()
#9 /Applications/XAMPP/xamppfiles/htdocs/projects/site/lib/Cake/Console/cake.php(49): ShellDispatcher::run(Array)
#10 {main}

Error: Database connection "Mysql" is missing, or could not be created.

#0 /Applications/XAMPP/xamppfiles/htdocs/projects/site/lib/Cake/Model/Datasource/DboSource.php(260): Mysql->connect()

#1 /Applications/XAMPP/xamppfiles/htdocs/projects/site/lib/Cake/Model/ConnectionManager.php(105): DboSource->__construct(Array)

#2 /Applications/XAMPP/xamppfiles/htdocs/projects/site/lib/Cake/Console/Command/Task/ModelTask.php(927): ConnectionManager::getDataSource('default')

#3 /Applications/XAMPP/xamppfiles/htdocs/projects/site/lib/Cake/Console/Command/Task/ModelTask.php(864): ModelTask->getAllTables('default')

#4 /Applications/XAMPP/xamppfiles/htdocs/projects/site/lib/Cake/Console/Command/Task/ModelTask.php(954): ModelTask->listAll('default')

#5 /Applications/XAMPP/xamppfiles/htdocs/projects/site/lib/Cake/Console/Command/BakeShell.php(150): ModelTask->getName('default')

#6 /Applications/XAMPP/xamppfiles/htdocs/projects/site/lib/Cake/Console/Shell.php(437): BakeShell->all()

#7 /Applications/XAMPP/xamppfiles/htdocs/projects/site/lib/Cake/Console/ShellDispatcher.php(207): Shell->runCommand('all', Array)

#8 /Applications/XAMPP/xamppfiles/htdocs/projects/site/lib/Cake/Console/ShellDispatcher.php(66): ShellDispatcher->dispatch()

#9 /Applications/XAMPP/xamppfiles/htdocs/projects/site/lib/Cake/Console/cake.php(49): ShellDispatcher::run(Array)

#10 {main}

Solution (in Mac OSX + XAMPP)

Adding the MySQL socket to YOUR_SITE/app/Config/database.php

'unix_socket' => '/Applications/XAMPP/xamppfiles/var/mysql/mysql.sock'

1	'unix_socket' => '/Applications/XAMPP/xamppfiles/var/mysql/mysql.sock'

This is how my database.php file looks like:

class DATABASE_CONFIG {

	public $default = array(
		'datasource' => 'Database/Mysql',
		'persistent' => false,
		'host' => 'localhost',
		'login' => 'my_user',
		'password' => 'my_password',
		'database' => 'my_database',
		'prefix' => '',
		'unix_socket' => '/Applications/XAMPP/xamppfiles/var/mysql/mysql.sock'
		//'encoding' => 'utf8',
	);

	public $test = array(
		'datasource' => 'Database/Mysql',
		'persistent' => false,
		'host' => 'localhost',
		'login' => 'user',
		'password' => 'password',
		'database' => 'test_database_name',
		'prefix' => '',
		//'encoding' => 'utf8',
	);
}

class DATABASE_CONFIG {

public $default = array(

'datasource' => 'Database/Mysql',

'persistent' => false,

'host' => 'localhost',

'login' => 'my_user',

'password' => 'my_password',

'database' => 'my_database',

'prefix' => '',

'unix_socket' => '/Applications/XAMPP/xamppfiles/var/mysql/mysql.sock'

//'encoding' => 'utf8',

);

public $test = array(

'datasource' => 'Database/Mysql',

'persistent' => false,

'host' => 'localhost',

'login' => 'user',

'password' => 'password',

'database' => 'test_database_name',

'prefix' => '',

//'encoding' => 'utf8',

);

}

This is link to stack overflow where I found more details about it: http://stackoverflow.com/questions/19280245/cakephp-database-connection-mysql-is-missing-or-could-not-be-created

That’s it for today, remember: be happy with your code!

alex-arriaga April 9, 2014

Session 5: jQuery for the real world (in spanish)

jQuery, Web Development No Reply

Do you wanted to know what’s Ajax? How to use it in your web applications? How this concept is related with frond-end development? Do you need to learn Ajax an apply it immediately? well, then this class is for you, it is the fifth class of one of my courses that you can see completely for free 😛 so, enjoy and share the video as many times as you want! and remember be happy with your code.

In this video we will see:

What is actually Ajax?
How to use Ajax with jQuery and do you work easily
Minimal recommended parameters for $ajax function
$.ajax jQuery function
Consuming JSON data from CakePHP (backend)

What would you like to know about?

Alex Arriaga

How to delete a remote Git tag

Some online editors for Markdown syntax

Session 6: jQuery for the real world (in spanish)

How to rename files recursively deleting white spaces in file names with shell script

“Error in exception handler” in first installation of Laravel framework – SOLVED

Problem

Trying to find the “real” problem to give a solution

Open directories with Sublime Text 2 using the command line (Mac OSX)

How to check SHA1 digest in Mac OS X

How to allow publishing of JavaEE applications with “errors” in IBM Rational® Software Architect

The problem

Solution

CakePHP Database connection “Mysql” is missing, or could not be created in CakePHP Console SOLVED

Problem

Solution (in Mac OSX + XAMPP)

Session 5: jQuery for the real world (in spanish)

Join me, have fun and learn!

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What would you like to know about?

Problem

Trying to find the “real” problem to give a solution

The problem

Solution

Problem

Solution (in Mac OSX + XAMPP)

Join me, have fun and learn!

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Recent Posts

Recent Comments

Join me, have fun and learn!

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Day quote…

Recent Comments

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Join me, have fun and learn!

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