Author: simion

OSX Disk Utility Erasing/Formatting stuck at “Unmounting disk …”, “Couldn’t unmount disk”

15 June, 201515 June, 2015 simion OSX Leave a comment

If you are trying to format/erase a disk and disk utility/diskUtil is stuck at “unmounting disk”, probably “fsck_hfs” is stuck in a loop, trying to repair it before mounting.

I’ve seen solutions where you must boot from an external operating system, bla blah. Too complicated and time consuming.

To fix this fast and easy, start formatting, wait for “unmounting disk” message to appear, then go to Terminal, find the process with the following command


ps ax | grep fsck_hfs

ps ax | grep fsck_hfs

You’ll get something like


simion@Simions-MacBook-Pro:~$ ps ax | grep fsck_hfs
 3693   ??  U      1:32.61 /System/Library/Filesystems/hfs.fs/Contents/Resources/./fsck_hfs -y /dev/disk2s2
 3984 s000  S+     0:00.00 grep fsck_hfs

simion@Simions-MacBook-Pro:~$ ps ax | grep fsck_hfs

3693 ?? U 1:32.61 /System/Library/Filesystems/hfs.fs/Contents/Resources/./fsck_hfs -y /dev/disk2s2

3984 s000 S+ 0:00.00 grep fsck_hfs

Then …

Aplicatia Bancomate pentru Android (În curand și pe IOS)

8 March, 20153 April, 2015 simion Other stories Leave a comment

Această aplicație vă ajută să gasiți ușor și rapid bănci și bancomate (atm-uri) în toată România.

Important: momentan lucrează doar cu anumite bănci, pentru a asigura corectitudinea datelor. Baza de date este în continuă dezvoltare, si vom adăuga bănci noi în perioada ce urmează.

Specificații:
– Afișeaza cele mai apropiate bancomate și bănci din locația dumneavoastră, sau in orice alt punct pe hartă
– Locațiile bancomatelor sunt actualizate zilnic, din surse oficiale, in mod automat (dacă apar bancomate noi, sau se desființeaza bancomate vechi, noi vom ști primii)
– Opțiune de navigare catre un bancomat ales
– Opțiune de căutare adresă / locație
– În cazul băncilor (sucursalelor) este afișat și un număr de telefon
– Filtru în funcție de banca aleasă
– Acoperire in toata Romania
– Pentru eficiența transferului de date/baterie, sunt afișate cele mai apropiate 30 bancomate/sucursale din locația curentă sau locația aleasă de dumneavostră, calculele fiind efectuate pe server.

Ce deosebește această aplicatie față de celelalte aplicații din acest domeniu?
Contine doar acele bancomate ale căror coordonate pe hartă sunt obtinute din surse oficiale (banci). Bancile care nu oferă coordonate exacte ale bancomatelor nu sunt implementate momentan (geocodarea adresei ar putea fi imprecisă, acest subiect va fi tratat în următoarea versiune). Deci cu noi mergeți la sigur!
În plus, baza de date este actualizata zilnic, in mod automat, pentru fiecare bancă în parte.

Băncile implementate în momentul de față (coordonate din surse oficiale):
– Banca Transilvania
– Raifeissen Bank
– BRD groupe societe generale
– ING Romania
– Bancpost
– Alpha Bank
– Euronet (Banca Carpatica)
– OPT Bank
– Unicredit Tiriac Bank
– Piraeus Bank
– Banca Romanească
În acest moment exista peste 6000 de bancomate în baza de date, pentru aceste bănci.
Bănci ce vor fi implementate (prin geocodarea adresei) în perioada ce urmează:
– BCR – Banca Comerciala Romana (80% finalizat)
– Garanti Bank
– BCR
– CEC Bank
– CreditEurope Bank
– Libra Bank
– Pro Credit Bank
– Leumi Bank
– Millenium Bank
– Marfin Bank

Aplicatia Bancomate pentru Android

Improve font rendering for IntelliJ IDEA / Pycharm in Ubuntu

26 November, 20146 July, 2015 simion Linux 7 Comments

Stock font rendering in Pycharm / Intelliji IDEA is horrible on Ubuntu. To improve it, change the following:

First of all, we need to install Infinality fonts:


sudo add-apt-repository ppa:no1wantdthisname/ppa
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install fontconfig-infinality

sudo /etc/fonts/infinality/infctl.sh setstyle linux
sudo gedit /etc/profile.d/infinality-settings.sh
# and set
USE_STYLE="UBUNTU"

sudo add-apt-repository ppa:no1wantdthisname/ppa

sudo apt-get update

sudo apt-get upgrade

sudo apt-get install fontconfig-infinality

sudo /etc/fonts/infinality/infctl.sh setstyle linux

sudo gedit /etc/profile.d/infinality-settings.sh

# and set

USE_STYLE="UBUNTU"

Installed the patched OpenJDK with fontfix:


sudo apt-add-repository -y ppa:no1wantdthisname/openjdk-fontfix
sudo apt-get update
sudo apt-get install openjdk-7-jdk

sudo apt-add-repository -y ppa:no1wantdthisname/openjdk-fontfix

sudo apt-get update

sudo apt-get install openjdk-7-jdk

In $IDEA_HOME/bin/*.vmoptions add the following: (PS: $IDEA_HOME is the path to IntelliJIdea or Pycharm)


-Dawt.useSystemAAFontSettings=lcd
-Dswing.aatext=true
-Dsun.java2d.xrender=true

-Dawt.useSystemAAFontSettings=lcd

-Dswing.aatext=true

-Dsun.java2d.xrender=true

and in ~/.profile add


export PYCHARM_JDK=/usr/lib/jvm/java-1.7.0-openjdk-amd64"

export PYCHARM_JDK=/usr/lib/jvm/java-1.7.0-openjdk-amd64"

or whatever the installed java path is.

Reboot.

Start the IDE and enjoy perfect fonts.

BlogPostPicture_PyCharm4

Ubuntu – Fix large fonts for Google Chrome in Address Bar and Bookmarks bar

24 November, 201424 November, 2014 simion Linux Leave a comment

Since version 35, chrome switched to Aura framework and does not follow GTK theme anymore. This leads to large font size in address bar, and bookmarks bar.

However, it grabs font size settings from org.gnome.desktop.interface “font-name” property. To fix this, run the following command:


gsettings set org.gnome.desktop.interface font-name 'Ubuntu 10'
# or
gsettings set org.gnome.desktop.interface font-name 'Ubuntu 11'
# depending on your preferences

gsettings set org.gnome.desktop.interface font-name 'Ubuntu 10'

# or

gsettings set org.gnome.desktop.interface font-name 'Ubuntu 11'

# depending on your preferences

You must restart chrome for this to work.

chrome

Django `CheckboxSelectMultiple` with `ModelMultipleChoiceField` generates too many queries (solution)

13 September, 201413 September, 2014 simion Django, Programming, Python Leave a comment

If you use django.forms.ModelMultipleChoiceField with the default widget ( django.forms.widgets.SelectMultiple ), all’s good.

However, if you need to generate checkboxes for your choices, and use django.forms.widgets.CheckboxSelectMultiple you’ll notice that the field will generate alot of queries (one for each element in the queryset), which is really really bad. I personally ended up with hundred of queries.

Fix: add cache_choices=True to your django.forms.ModelMultipleChoiceField

Example:

Good practice:


test = forms.ModelMultipleChoiceField(
        queryset=MyModel.objects.all(),
        cache_choices=True,
        widget=forms.CheckboxSelectMultiple)

test = forms.ModelMultipleChoiceField(

queryset=MyModel.objects.all(),

cache_choices=True,

widget=forms.CheckboxSelectMultiple)

Bad practice:


test = forms.ModelMultipleChoiceField(
        queryset=MyModel.objects.all(),
        widget=forms.CheckboxSelectMultiple)

test = forms.ModelMultipleChoiceField(

queryset=MyModel.objects.all(),

widget=forms.CheckboxSelectMultiple)

Command/Shortcut to Lock Screen with “away message prompt” in Linux Mint 17 / Cinnamon

24 June, 2014 simion Linux Leave a comment

If you want to have a shortcut with for locking the screen, but with prompt for lock message, here’s what you need to do:

Go to Settings -> Keyboard, then click on Keyboard shortcuts tab
Click on Add custom shortcut button, and enter the following command:

Shell

python /usr/lib/cinnamon-screensaver-lock-dialog/cinnamon-screensaver-lock-dialog.py

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python /usr/lib/cinnamon-screensaver-lock-dialog/cinnamon-screensaver-lock-dialog.py

example:
Click Add and then assign it a shortcut.
For example, the default lock screen shortcut is Ctrl+Alt+L. For the one with prompt, you can assign Ctrl+L.
You’re done.
When you want to lock your screen with a custom “away” message, just press the shortcut you assigned (Ctrl + L)

Install Skype 4.3 in Arch Linux / Manjaro

18 June, 201418 June, 2014 simion Linux 4 Comments

Hi there,

Skype just released version 4.3 for linux. You can read this article from OMG Ubuntu! to see what’s new in 4.3

Long story short:

native notifications
UI improvements (new toolbar, better login screen, design changes)
floating widget for Call
cloud based Group Chat
support for PulseAudio 3.0 and 4.0

Currently, the AUR “multilib/skype” package is not upgraded to 4.3. If you don’t wish to wait, here’s what you must do:

Download Skype -> http://www.skype.com/go/linux (Choose “Dynamic” from distribution dropdown)
Extract the archive

Shell

cd Downloads tar -xjf skype-4.3.*

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cd Downloads

tar -xjf skype-4.3.*
Move the contents of the extracted folder to /opt/skype

Shell

sudo mkdir /opt/skype sudo mv skype-4.3.*/* /opt/skype

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sudo mkdir /opt/skype

sudo mv skype-4.3.*/* /opt/skype

Edit /usr/bin/skype , and change the exec command path to exec "/opt/skype/skype" "$@"


#!/bin/bash

LIBDIR="/usr/lib32"

if [[ -e "$LIBDIR/libv4l/v4l2convert.so" ]]; then
        export LD_PRELOAD="${LD_PRELOAD:+$LD_PRELOAD:}$LIBDIR/libv4l/v4l2convert.so"
fi

if [[ -e "/usr/share/skype/lib/libQtWebKit.so.4" ]]; then
        export LD_PRELOAD="${LD_PRELOAD:+$LD_PRELOAD:}/usr/share/skype/lib/libQtWebKit.so.4"
fi

# exec "$LIBDIR/skype/skype" "$@"  # (old one)
exec "/opt/skype/skype" "$@"

#!/bin/bash

LIBDIR="/usr/lib32"

if [[ -e "$LIBDIR/libv4l/v4l2convert.so" ]]; then

export LD_PRELOAD="${LD_PRELOAD:+$LD_PRELOAD:}$LIBDIR/libv4l/v4l2convert.so"

if [[ -e "/usr/share/skype/lib/libQtWebKit.so.4" ]]; then

export LD_PRELOAD="${LD_PRELOAD:+$LD_PRELOAD:}/usr/share/skype/lib/libQtWebKit.so.4"

# exec "$LIBDIR/skype/skype" "$@" # (old one)

exec "/opt/skype/skype" "$@"

Sublime slack – preformatted text

9 June, 2014 simion Sublime Slack Leave a comment

Changelog in 1.4.5: Whenever you send a code selection (ctrl+alt+u), it is preformatted.

Example:

Django get current user globally in the project

23 May, 201425 May, 2014 simion Django Leave a comment

Sometimes, you will need to get the current authenticated user in models, or other parts of your app.

To achieve this, you must create this middleware and add it to MIDDLEWARE_CLASSES in project settings:


try:
    from threading import local, current_thread
except ImportError:
    from django.utils._threading_local import local

_thread_locals = local()


class GlobalUserMiddleware(object):
    """
    Sets the current authenticated user in threading locals

    Usage example:
        from app_name.middleware import get_current_user
        user = get_current_user()
    """
    def process_request(self, request):
        setattr(
            _thread_locals,
            'user_{0}'.format(current_thread().name),
            request.user)

    def process_response(self, request, response):

        key = 'user_{0}'.format(current_thread().name)

        if not hasattr(_thread_locals, key):
            return response

        delattr(_thread_locals, key)

        return response


def get_current_user():
    return getattr(
        _thread_locals,
        'user_{0}'.format(current_thread().name),
        None)

try:

from threading import local, current_thread

except ImportError:

from django.utils._threading_local import local

_thread_locals = local()

class GlobalUserMiddleware(object):

"""

Sets the current authenticated user in threading locals

Usage example:

from app_name.middleware import get_current_user

user = get_current_user()

"""

def process_request(self, request):

setattr(

_thread_locals,

'user_{0}'.format(current_thread().name),

request.user)

def process_response(self, request, response):

key = 'user_{0}'.format(current_thread().name)

if not hasattr(_thread_locals, key):

return response

delattr(_thread_locals, key)

return response

def get_current_user():

return getattr(

_thread_locals,

'user_{0}'.format(current_thread().name),

None)

Usage example:


from myapp.middleware import get_current_user

user = get_current_user()

from myapp.middleware import get_current_user

user = get_current_user()

Invalidate template fragment cache in Django 1.5

21 May, 201421 May, 2014 simion Django, Python Leave a comment

Django 1.5 does not have a utility method to delete template fragment cache, with arguments.

In order to achieve this, you must create a custom method:


from django.core.cache import cache
from django.utils.hashcompat import md5_constructor
from django.utils.http import urlquote


def invalidate_template_fragment(fragment_name, *variables):
    args = md5_constructor(u':'.join([urlquote(var) for var in variables]))
    cache_key = 'template.cache.{0}.{1}'.format(fragment_name, args.hexdigest())
    cache.delete(cache_key)

from django.core.cache import cache

from django.utils.hashcompat import md5_constructor

from django.utils.http import urlquote

def invalidate_template_fragment(fragment_name, *variables):

args = md5_constructor(u':'.join([urlquote(var) for var in variables]))

cache_key = 'template.cache.{0}.{1}'.format(fragment_name, args.hexdigest())

cache.delete(cache_key)

Example usage:


{% cache 259200 key_name model_instance.pk %}
    ... cached content here ...
{% endcache %}

// note that "model_instance.pk" is optional argument. You can use as many as you need

{% cache 259200 key_name model_instance.pk %}

... cached content here ...

{% endcache %}

// note that "model_instance.pk" is optional argument. You can use as many as you need

… and delete the cache:


invalidate_template_fragment('key_name', model_instance.pk)

invalidate_template_fragment('key_name', model_instance.pk)

In django 1.6+ you can do this more easy:


from django.core.cache import cache
from django.core.cache.utils import make_template_fragment_key

key = make_template_fragment_key('key_name', [model_instance.pk])
cache.delete(key)

from django.core.cache import cache

from django.core.cache.utils import make_template_fragment_key

key = make_template_fragment_key('key_name', [model_instance.pk])

cache.delete(key)