[Accessibility]Missing contentDescription attribute on image

Resolved this warning by setting attribute android:contentDescription for my ImageView

android:contentDescription=”@string/desc”

this link for explanation: http://developer.android.com/guide/practices/design/accessibility.html

 

 

 

 
Shobhit Jain

mysql retrieve first 100 characters

 

SELECT LEFT(field, 100) AS excerpt FROM table(s) WHERE ...

See the LEFT() function

 

How to grep inside a folder

This is how we do it

grep -nr string my_directory

SSH Connection TIme-limit Settings

Hi,

Sometimes you get irritated when ssh connection times out and you have to connect to ssh again.

Method 1:-

Open /etc/ssh/ssh_config on your (client) computer. Add the following line:

ServerAliveInterval 180

 

Method 2:-

ssh -o ConnectTimeout=100 <host>

Where 100 is the number of seconds

Change the type of EC2 Instance on Amazon

1. Login to aws.amazon.com
2. Go to EC2 Console
3. Select the instance you want to change the type of
4. Click Actions(on the top)
5. Select Stop from the dropdown list
6. After the instance gets stopped, Click the Action again.
7. Click Change Instance Type
8. Select the Type of the instance you want to change
9. Start the Instance

Note: If you have assigned Elastic IP to the Instance then it will gets dis-associated so click elastic ip option and  Associate the IP to the instance. 

Change Username for Whole Mac

Sometimes you change the username in user and Account Settings and it still shows old username.so this is what you need to do

System Preferences->Sharing->Computer Name

OR

sudo hostname your_hostname

If that doesn’t work, try this:

sudo scutil --set HostName your_hostname

mysql_config not found on easy_install mysql_python

Hi , 

Sometimes on your mac whenever you do , easy_install mysql-python . you get 

 

Environment Error: mysql_config not found

 

It is a simple fix.

 

export $ PATH=/usr/local/mysql/bin:$PATH

NOW sudo easy_install mysql_python

Just check your mysql bin path , it might be different

You should see these type of logs while installing mysql-python

Searching for mysql-python
Reading http://pypi.python.org/simple/mysql-python/
Best match: MySQL-python 1.2.4
Downloading http://pypi.python.org/packages/source/M/MySQL-python/MySQL-python-1.2.4.zip#md5=ddf2386daf10a97af115ffad2ed4a9a0
Processing MySQL-python-1.2.4.zip
Running MySQL-python-1.2.4/setup.py -q bdist_egg –dist-dir /tmp/easy_install-SJMVBl/MySQL-python-1.2.4/egg-dist-tmp-mm1dBM
Downloading http://pypi.python.org/packages/source/d/distribute/distribute-0.6.28.tar.gz
Extracting in /tmp/easy_install-SJMVBl/MySQL-python-1.2.4/temp/tmpwLUyDi
Now working in /tmp/easy_install-SJMVBl/MySQL-python-1.2.4/temp/tmpwLUyDi/distribute-0.6.28
Building a Distribute egg in /private/tmp/easy_install-SJMVBl/MySQL-python-1.2.4

Adding MySQL-python 1.2.4 to easy-install.pth file

Installed /Library/Python/2.7/site-packages/MySQL_python-1.2.4-py2.7-macosx-10.8-intel.egg
Processing dependencies for mysql-python

 

Enjoy Coding..

Node Version Manager (NVM)

Install script

To install you could use the install script (requires Git) using cURL:

curl https://raw.github.com/creationix/nvm/master/install.sh | sh

or Wget:

wget -qO- https://raw.github.com/creationix/nvm/master/install.sh | sh

The script clones the Nvm repository to ~/.nvm and adds the source line to your profile (~/.bash_profile or ~/.profile).

Manual install

For manual install create a folder somewhere in your filesystem with the nvm.sh file inside it. I put mine in a folder called nvm.

Or if you have git installed, then just clone it:

git clone git://github.com/creationix/nvm.git ~/.nvm

To activate nvm, you need to source it from your bash shell

source ~/.nvm/nvm.sh

I always add this line to my ~/.bashrc or ~/.profile file to have it automatically sourced upon login.
Often I also put in a line to use a specific version of node.

Usage

To download, compile, and install the latest v0.10.x release of node, do this:

nvm install 0.10

And then in any new shell just use the installed version:

nvm use 0.10

Or you can just run it:

nvm run 0.10

If you want to see what versions are installed:

nvm ls

If you want to see what versions are available to install:

nvm ls-remote

To restore your PATH, you can deactivate it.

nvm deactivate

To set a default Node version to be used in any new shell, use the alias ‘default’:

nvm alias default 0.10

Time in Python

CURRENT TIME IN PYTHON

import time
print time.time()

#Print as a Single Value
print int(time.time())

EPOCH TO HUMAN READABLE DATE

import time
time.strftime("%a, %d %b %Y %H:%M:%S +0000", time.localtime(time.time()))
#Replace time.localtime with time.gmtime for GMT time

Installing Node.js

Installing Node.js via package manager

The packages on this page are maintained and supported by their respective packagers, not the node.js core team. Please report any issues you encounter to the package maintainer. If it turns out your issue is a bug in node.js itself, the maintainer will report the issue upstream.

Gentoo

Node.js is available in official gentoo portage tree. You have to unmask it.

# emerge -aqv --autounmask-write nodejs
# etc-update
# emerge -aqv nodejs

Debian, LMDE

Node.js is available in official repo for Debian Sid(unstable).

For Debian Wheezy, your best bet is to compile node by yourself:

sudo apt-get install python g++ make checkinstall
mkdir ~/src && cd $_
wget -N http://nodejs.org/dist/node-latest.tar.gz
tar xzvf node-latest.tar.gz && cd node-v*
./configure
checkinstall #(remove the "v" in front of the version number in the dialog)
sudo dpkg -i node_*

Uninstall:

sudo dpkg -r node

Ubuntu, Mint

Example install:

sudo apt-get update
sudo apt-get install python-software-properties python g++ make
sudo add-apt-repository ppa:chris-lea/node.js
sudo apt-get update
sudo apt-get install nodejs

It installs current stable Node on the current stable Ubuntu. Quantal (12.10) users may need to install the software-properties-commonpackage for the add-apt-repository command to work: sudo apt-get install software-properties-common

As of Node.js v0.10.0, the nodejs package from Chris Lea‘s repo includes both npm and nodejs-dev.

There is a naming conflict with the node package (Amateur Packet Radio Node Program), and the nodejs binary has been renamed fromnode to nodejs. You’ll need to symlink /usr/bin/node to /usr/bin/nodejs or you could uninstall the Amateur Packet Radio Node Program to avoid that conflict.

openSUSE & SLE

Node.js stable repos list. Also node.js is available in openSUSE:Factory repository.

Available RPM packages for: openSUSE 11.4, 12.1, Factory and Tumbleweed; SLE 11 (with SP1 and SP2 variations).

Example install on openSUSE 12.1:

sudo zypper ar http://download.opensuse.org/repositories/devel:/languages:/nodejs/openSUSE_12.1/ NodeJSBuildService 
sudo zypper in nodejs nodejs-devel

Fedora

Node.js and npm are available in Fedora 18 and later. Just use your favorite graphical package manager or run this on a terminal to install both npm and node:

sudo yum install npm

RHEL/CentOS/Scientific Linux 6

Node.js and npm are available from the Fedora Extra Packages for Enterprise Linux (EPEL) repository. If you haven’t already done so, first enable EPEL and then run the following command to install node and npm:

su -c 'yum install npm'

Arch Linux

Node.js is available in the Community Repository.

pacman -S nodejs

FreeBSD and OpenBSD

Node.js is available through the ports system.

/usr/ports/www/node

Development versions are also available using ports

cd /usr/ports/www/node-devel/ && make install clean

or packages on FreeBSD

pkg_add -r node-devel

OSX

Using a package

Simply download Macintosh Installer.

Using homebrew:

brew install node

Using macports:

port install nodejs  

Windows

Using a package

Simply download Windows Installer.

Using chocolatey to install Node:

cinst nodejs  

or for full install with NPM:

cinst nodejs.install