SVN List Codes

Codes Displayed when doing an "svn stat"
U = Working file was updated
G = Changes on the repository were automatically merged into the working copy
M = Working Copy is modified
C = This file conflicts with the version in the repo
? = This file is not under version control
! = This file is under version control but is missing or incomplete
A = This file will be added to version control after commit
A+ = This file will be moved after commit
D = This file will be deleted after commit
I = This item is being ignored (due to the svn:ignore porperty)
L = This file is locked
X =  Item is unversioned, but used by an externals definition
~ = Messed up item (file when it should be dir). resolve by moving and doing "svn up"

http://knaddison.com/technology/svn-status-code-cheat-sheet

Python List Operations (map, for comprehensions)

EXAMPLE 1
# Create a list
>>> l = [1,2,3,4,5,6]

# iterate through the list using a for comprehension
>>> [i for i in l]
[1, 2, 3, 4, 5, 6]

# square elements in the list using a for comprehension
>>> [i**2 for i in l]
[1, 4, 9, 16, 25, 36]

# square only even elements in the list using a for comprehension
>>> [i**2 for i in l if i % 2 == 0]
[4, 16, 36]

# iterate through the list using map
>>> map(lambda w: w, l)
[1, 2, 3, 4, 5, 6]

# square each element of the list using map
>>> map(lambda w: w**2, l)
[1, 4, 9, 16, 25, 36]

# or use map to call a separately defined function to# iterate through the list
>>> def squa(x):
...... return x**2

>>> map(squa, l)
[1, 4, 9, 16, 25, 36]

# use map function to call a separately defined function that takes 2 args
>>> l2 = map(lambda w: (w,2),l)
>>> l2
[(1, 2), (2, 2), (3, 2), (4, 2), (5, 2), (6, 2)]

>>> def pow(base, expo):
...... return base**expo

>>> map(lambda (x,y): pow(x,y), l2)
[1, 4, 9, 16, 25, 36]

# filter a list
>>> filter(lambda w: w > 2, l)
[3, 4, 5, 6]

EXAMPLE 2
# define a simple class to play with
>>> class A(object):
...... def __init__(self, x):
........ self.x = x

# create simple list of object instances of the class
>>> l = [A(1), A(2), A(3)]

# use a for (list) comprehension to iterate through the list
>>> [i.x for i in l]
[1, 2, 3]

# use a for comprehension to iterate with a condition
>>> [i.x for i in l if i.x > 1]
[2, 3]

# use map to apply a function to every element in the list
>>> map(lambda w: w.x, l)
[1, 2, 3]

>>> map(lambda w: w.x * w.x, l)
[1, 4, 9]

EXAMPLE 1

# Create a list

>>> l = [1,2,3,4,5,6]

# iterate through the list using a for comprehension

>>> [i for i in l]

[1, 2, 3, 4, 5, 6]

# square elements in the list using a for comprehension

>>> [i**2 for i in l]

[1, 4, 9, 16, 25, 36]

# square only even elements in the list using a for comprehension

>>> [i**2 for i in l if i % 2 == 0]

[4, 16, 36]

# iterate through the list using map

>>> map(lambda w: w, l)

[1, 2, 3, 4, 5, 6]

# square each element of the list using map

>>> map(lambda w: w**2, l)

[1, 4, 9, 16, 25, 36]

# or use map to call a separately defined function to# iterate through the list

>>> def squa(x):

...... return x**2

>>> map(squa, l)

[1, 4, 9, 16, 25, 36]

# use map function to call a separately defined function that takes 2 args

>>> l2 = map(lambda w: (w,2),l)

>>> l2

[(1, 2), (2, 2), (3, 2), (4, 2), (5, 2), (6, 2)]

>>> def pow(base, expo):

...... return base**expo

>>> map(lambda (x,y): pow(x,y), l2)

[1, 4, 9, 16, 25, 36]

# filter a list

>>> filter(lambda w: w > 2, l)

[3, 4, 5, 6]

EXAMPLE 3

# split a list into chunks

>>> map(None, *(iter(range(10)),) * 3)

[(0, 1, 2), (3, 4, 5), (6, 7, 8), (9, None, None)]

http://stackoverflow.com/questions/1335392/iteration-over-list-slices

Find Usage

"Grep" through each file in a directory:
ls xargs grep -i 'STRING'

List all directories and subdirectories in a directory
find . -type d

List all files in a directory no recursion
# workaround for "parameter list is too long".
find . \( ! -name . -prune \) -name 'STRING*' -print
find . -maxdepth 1 -name 'STRING*' -print # GNU find only

Remove all files in a directory no recursion
# workaround for "parameter list is too long".
find . \( ! -name . -prune \) -name 'STRING*' -print -exec rm {} \;

Find a file with a given inode and delete it
ls -lai # lists the inodes next to the files
find . -inum 12345 -exec rm {} \; # finds and removes by inode

http://www.faqs.org/qa/qa-1381.html
http://sial.org/howto/shell/