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MongoDB: Find a document by non-existence of a field?
...operator:
db.mycollection.find({ "price" : { "$exists" : false } })
and see its documentation.
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Is there a function to deselect all text using JavaScript?
...elements. For form-fields (like textarea), this method doesn't work in IE9 and FF5.
– Šime Vidas
Jul 3 '11 at 13:37
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How can I have grep not print out 'No such file or directory' errors?
I'm grepping through a large pile of code managed by git, and whenever I do a grep, I see piles and piles of messages of the form:
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Python Empty Generator Function
... return once in a generator; it stops iteration without yielding anything, and thus provides an explicit alternative to letting the function run out of scope. So use yield to turn the function into a generator, but precede it with return to terminate the generator before yielding anything.
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What does inverse_of do? What SQL does it generate?
I'm trying to get my head around inverse_of and I do not get it.
8 Answers
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When should a class be Comparable and/or Comparator?
I have seen classes which implement both Comparable and Comparator . What does this mean? Why would I use one over the other?
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How can I keep my fork in sync without adding a separate remote?
...forked it.
Click on Create pull request:
Give the pull request a title and maybe a description and click Create pull request.
On the next page, scroll to the bottom of the page and click Merge pull request and Confirm merge.
Your Git repository me/foobar will be updated.
Edit: rebase options ...
Modern way to filter STL container?
...std::copy_if evaluates the lambda expression for every element in foo here and if it returns true it copies the value to bar.
The std::back_inserter allows us to actually insert new elements at the end of bar (using push_back()) with an iterator without having to resize it to the required size firs...
WWW or not WWW, what to choose as primary site name? [closed]
From technical perspective the only issue is traffic and incoming links (one of them should redirect to another).
14 Answe...
What is the status of JSR 305?
...ion JSR305 vs. JSR308 (Java Type Anotations) - Which is going to be the standard? and I understand the difference between JSR 308 and JSR 305 .
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