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How to write log to file
... answered Nov 13 '13 at 22:56
Allison AAllison A
4,62966 gold badges2525 silver badges3232 bronze badges
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How to rollback a specific migration?
...nt to go back.
For example:
rake db:rollback STEP=5
Will also rollback all the migration that happened later (4, 3, 2 and also 1).
To roll back all migrations back to (and including) a target migration, use: (This corrected command was added AFTER all the comments pointing out the error in the ...
How to keep keys/values in same order as declared?
...ry that I declared in a particular order and want to keep it in that order all the time. The keys/values can't really be kept in order based on their value, I just want it in the order that I declared it.
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How do I use vim registers?
...on Windows (or from "mouse highlight" clipboard on Linux)
"*p
To access all currently defined registers type
:reg
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How to check if a symlink exists
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do you really see a difference between -L and -h ? in my bash ( version 4.2.53(1)-release (x86_64-redhat-linux-gnu ) man bash is identical for both -L and -h and they behave the same, ie they check that file actualy is a link and don'...
AngularJs ReferenceError: $http is not defined
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ŁukaszBachmanŁukaszBachman
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MySQL query to get column names?
I'd like to get all of a mysql table's col names into an array in php?
21 Answers
21
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How to get only the last part of a path in Python?
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I initially thought rstrip('/') would be simpler but then quickly realised I'd have to use rstrip(os.path.sep), so obviously the use of normpath is justified.
– Erik Kaplun
Jun 29 '14 at 13:44
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What is memoization and how can I use it in Python?
...orials using memoization in Python would be something like this:
factorial_memo = {}
def factorial(k):
if k < 2: return 1
if k not in factorial_memo:
factorial_memo[k] = k * factorial(k-1)
return factorial_memo[k]
You can get more complicated and encapsulate the memoization...
jQuery Validate - Enable validation for hidden fields
...ry, this could break an existing
setup. In the unlikely case that it actually does, you can fix it by
setting the ignore-option to “[]” (square brackets without the
quotes)."
To change this setting for all forms:
$.validator.setDefaults({
ignore: [],
// any other default option...