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MongoDB: How to query for records where field is null or not set?

... jdijdi 79.8k1717 gold badges144144 silver badges180180 bronze badges ad...
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How do I typedef a function pointer with the C++11 using syntax?

... 189 It has a similar syntax, except you remove the identifier from the pointer: using FunctionPtr ...
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What does the exclamation mark mean in a Haskell declaration?

..., has a ! in front of it, so is strictly evaluated: (4+4) is executed, and 8 is stored in that memory location. The fourth parameter is also strictly evaluated. But here's where it gets a bit tricky: we're evaluating not fully, but only to weak normal head form. This means that we figure out whethe...
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Overloading Macro on Number of Arguments

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How do I declare a namespace in JavaScript?

... user229044♦ 202k3535 gold badges298298 silver badges309309 bronze badges answered May 19 '09 at 8:22 dfadfa 105k...
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What is a “Bitmap heap scan” in a query plan?

...| edited Jul 6 '11 at 13:18 answered Jul 6 '11 at 7:31 Deni...
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How to properly handle a gzipped page when using curl?

...artinMartin 31.6k1313 gold badges6767 silver badges7878 bronze badges 24 ...
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Change font size of UISegmentedControl

...| edited Apr 2 '19 at 21:18 Ryan Stone 2711 silver badge99 bronze badges answered Sep 15 '11 at 23:54 ...
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Print function log /stack trace for entire program using firebug

... 218 Firefox provides console.trace() which is very handy to print the call stack. It is also availa...
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Creating a zero-filled pandas data frame

... ShravanShravan 1,86322 gold badges1212 silver badges1919 bronze badges ...