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Skipping Iterations in Python
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“Wrong type argument: commandp” error when binding a lambda to a key
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How to set a default value for a datetime column to record creation time in a migration?
...ce some sql code in the migration for setting the default value at the database level, something like:
execute 'alter table foo alter column starts_at set default now()'
Setting something like this:
create_table :foo do |t|
t.datetime :starts_at, :null => false, :default => Time.now
end
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How do I undo a checkout in git?
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Django removing object from ManyToMany relationship
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Since add immediately affects the database, you do not need to save afterwards ;)
– cwhisperer
Sep 11 at 9:27
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Running a command as Administrator using PowerShell?
...erShell scripts. There a few minor issue with his code; a modified version based on fixes suggested in the comment is below.
Basically it gets the identity associated with the current process, checks whether it is an administrator, and if it isn't, creates a new PowerShell process with administrato...
Should I use scipy.pi, numpy.pi, or math.pi?
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In PHP, why does not show a parse error?
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What is Virtual DOM?
... an abstraction of the HTML DOM that selectively renders subtrees of nodes based upon state changes. It does the least amount of DOM manipulation possible in order to keep your components up to date.
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Direct casting vs 'as' operator?
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'as' is based on 'is', which is a keyword that checks at runtime if the object is polimorphycally compatible (basically if a cast can be made) and returns null if the check fails.
These two are equivalent:
Using 'as':
string s = o...