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Rails Migration: Remove constraint
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Paul SturgessPaul Sturgess
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What's the difference between findAndModify and update in MongoDB?
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answered May 28 '12 at 3:21
Asya KamskyAsya Kamsky
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How to remove array element in mongodb?
...ion.update(
{ _id: id },
{ $pull: { 'contact.phone': { number: '+1786543589455' } } }
);
It will find document with the given _id and remove the phone +1786543589455 from its contact.phone array.
You can use $unset to unset the value in the array (set it to null), but not to remove it complet...
Is there a good way to attach JavaScript objects to HTML elements?
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edited Dec 1 '09 at 23:14
answered Sep 9 '09 at 23:39
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Postgres dump of only parts of tables for a dev snapshot
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3 Answers
3
Active
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What is “lifting” in Scala?
...gt;
scala> res1(-1)
res2: Option[Boolean] = None
scala> res1(1)
res3: Option[Boolean] = Some(false)
Methods
You can "lift" a method invocation into a function. This is called eta-expansion (thanks to Ben James for this). So for example:
scala> def times2(i: Int) = i * 2
times2: (i: In...
Is there a float input type in HTML5?
...p=0.001 /> Step 0.001<br />
<input type=datetime-local step=3600 /> Step 3600 (1 hour)<br />
<input type=datetime-local step=86400 /> Step 86400 (1 day)<br />
<input type=datetime-local step=70 /> Step 70 (1 min, 10 sec)<br />
</form>
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Does ARC support dispatch queues?
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234
The short answer: YES, ARC retains and releases dispatch queues.
And now for the long an...
How are cookies passed in the HTTP protocol?
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302
The server sends the following in its response header to set a cookie field.
Set-Cookie:name=...
Use logging print the output of pprint
...org/2/library/…
– Ed Brannin
Aug 13 '13 at 16:58
2
@EdBrannin Does pformat add that much overhe...