tathagata

Programming Achievements: How to Level Up as a Developer

This gist is part of a blog post. Check it out at:

http://jasonrudolph.com/blog/2011/08/09/programming-achievements-how-to-level-up-as-a-developer

tathagata

cat docword_as_id | sort -t',' -k1 | uniq | awk -F"," '{if (index($2," ")>0) print$0}' | wc -l --tathagatadg Tue 13 Sep 2011 04:15:20 PM CDT

tathagata

import os

#So much can be done with these two simple lines .. have to always lookup!
for root, dirnames, filenames in os.walk('root/'):
        for filename in filenames:
                absfn = os.path.join(root, filename)
                print absfn
                filecontents = open(absfn, 'rb').read()
                print filecontents

tathagata

1. Change the perspective to Debug
2. Right click on the class containing main in Debug box
3. Select property. Copy the code

tathagata

#Stop tomcat started from Eclipse, helpful when it throws java.lang.OutOfMemoryError: PermGen space

kill -9 `ps aux | grep java | grep tomcat | cut -d' ' -f7`


#list all sizes of the directory
du -sh *

tathagata

String plaintext = "your text here";
MessageDigest m = MessageDigest.getInstance("MD5");
m.update(plaintext.getBytes());
byte[] digest = m.digest();
BigInteger bigInt = new BigInteger(1,digest);
String hashtext = bigInt.toString(16);
// Now we need to zero pad it if you actually want the full 32 chars.
while(hashtext.length() < 32 ){
  hashtext = "0"+hashtext;
}

tathagata

#if there is a -1 in a list
x = [1,1,1]
any(i for i in x if i==-1)
True

# if all elements of the list are equal
x = [1,1,1]
all(x[0] == i for i in x)
True

tathagata

min = float('inf')

for x in somelist:
  if x<min: 
    min=x

tathagata

1. visually comment out block
- select section visually
- go to command mode
- s/^/# enter. comments
- s/#/ enter. uncomments



NERDTree

tathagata

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js" type="text/javascript" ></script>