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Generate array of all letters and digits
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145
[*('a'..'z'), *('0'..'9')] # doesn't work in Ruby 1.8
or
('a'..'z').to_a + ('0'..'9').to_a ...
How to pass arguments and redirect stdin from a file to program run in gdb?
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136
Pass the arguments to the run command from within gdb.
$ gdb ./a.out
(gdb) r < t
Starting ...
Cartesian product of x and y array points into single array of 2D points
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13 Answers
13
Active
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How to migrate back from initial migration in Django 1.7?
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You can do the same with Django 1.7+ also:
python manage.py migrate <app> zero
This clears <app> from migration history and drops all tables of <app>
See django docs for more info.
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How to calculate moving average using NumPy?
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14 Answers
14
Active
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Select statement to find duplicates on certain fields
... of fields for which there are multiple records, you can use..
select field1,field2,field3, count(*)
from table_name
group by field1,field2,field3
having count(*) > 1
Check this link for more information on how to delete the rows.
http://support.microsoft.com/kb/139444
There should be a cr...
CSS I want a div to be on top of everything
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122
In order for z-index to work, you'll need to give the element a position:absolute or a positio...
Path to Powershell.exe (v 2.0)
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175
I believe it's in C:\Windows\System32\WindowsPowershell\v1.0\. In order to confuse the innocen...
How to fix the uninitialized constant Rake::DSL problem on Heroku?
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answered Jun 7 '11 at 9:31
KaleKale
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Abort makefile if variable not set
... all have non-empty values,
# die with an error otherwise.
#
# Params:
# 1. Variable name(s) to test.
# 2. (optional) Error message to print.
check_defined = \
$(strip $(foreach 1,$1, \
$(call __check_defined,$1,$(strip $(value 2)))))
__check_defined = \
$(if $(value $1),, \
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