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jQuery selector for the label of a checkbox
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5 Answers
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Iterate a list with indexes in Python
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356
>>> a = [3,4,5,6]
>>> for i, val in enumerate(a):
... print i, val
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0 ...
How do I wrap link_to around some html ruby code?
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Why does Lua have no “continue” statement?
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In Lua 5.2 the best workaround is to use goto:
-- prints odd numbers in [|1,10|]
for i=1,10 do
if i % 2 == 0 then goto continue end
print(i)
::continue::
end
This is supported in LuaJIT since version 2.0.1
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Why does csvwriter.writerow() put a comma after each character?
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151
It expects a sequence (eg: a list or tuple) of strings. You're giving it a single string. A str...
Rails 4: before_filter vs. before_action
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finding and replacing elements in a list
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>>> a= [1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1]
>>> for n, i in enumerate(a):
... if i == 1:
... a[n] = 10
...
>>> a
[10, 2, 3, 4, 5, 10, 2, 3, 4, 5, 10]
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Extract elements of list at odd positions
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Run a callback only if an attribute has changed in Rails
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Rails 5.1+
class Page < ActiveRecord::Base
before_save :do_something, if: :will_save_change_to_status_id?
private
def do_something
# ...
end
end
The commit that changed ActiveRecord::Dirty is here: https://githu...
How do you install ssh-copy-id on a Mac?
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