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How do I comment on the Windows command line?
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Powershell
For powershell, use #:
PS C:\> echo foo # This is a comment
foo
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setTimeout / clearTimeout problems
... clearTimeout(timeout);
this.setState({
timeout: setTimeout(() => {this.callAPI()}, 250)
})
}
}
Helpful if you'd like to only call an API after the user has stopped typing for instance. The userTimeout function could be bound via onKeyUp to an input.
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What is the difference between pluck and collect in Rails?
...lient.pluck(:id, :name)
# SELECT clients.id, clients.name FROM clients
# => [[1, 'David'], [2, 'Jeremy'], [3, 'Jose']]
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Why use the INCLUDE clause when creating an index?
...mark lookup for each employee found in the index is no longer necessary --> you save a lot of time.
Obviously, you cannot include every column in every non-clustered index - but if you do have queries which are missing just one or two columns to be "covered" (and that get used a lot), it can be ...
Objective-C: Where to remove observer for NSNotification?
...er.defaultCenter().removeObserver(self)
}
}
Objective-C
In iOS 6.0 > version , its better to remove observer in viewWillDisappear as viewDidUnload method is deprecated.
[[NSNotificationCenter defaultCenter] removeObserver:observerObjectHere];
There is many times its better to remove ...
What does Maven Update Project do in Eclipse?
What does " Maven -> Update Project... " do in Eclipse?
3 Answers
3
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The role of #ifdef and #ifndef
...pair.
#if defined(ORA_PROC) || defined(__GNUC) && __GNUC_VERSION > 300
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Format number to 2 decimal places
...RUNCATE to format numbers because you will simply lose truncated digits" => Well, that's the point of truncature... I don't see how we should get 0.17 with Math. Your answer is perfect for programming examples but it is not very thorough.
– Benoit Duffez
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Django admin: How to display a field that is marked as editable=False' in the model?
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Use Readonly Fields. Like so (for django >= 1.2):
class MyModelAdmin(admin.ModelAdmin):
readonly_fields=('first',)
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moving committed (but not pushed) changes to a new branch after pull
...these steps:
git log
git diff {previous to last commit} {latest commit} > your_changes.patch
git reset --hard origin/{your current branch}
git checkout -b {new branch}
git apply your_changes.patch
I can imagine that there is a simpler approach for steps one and two.
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