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How to remove a field completely from a MongoDB document?
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Addition to this, if tags is an array then it would be like this: db.example.update({},{ $unset: {'tags.$[].words':1}},false, true)
– Manan Shah
Dec 21 '18 at 6:34
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What's the shortest code to cause a stack overflow? [closed]
...u will eventually--and I mean eventually--hit a point where the Javascript array that represents the Befunge stack becomes too large for the browser to reallocate. If you had a simple Befunge interpreter with a smaller and bounded stack--as is the case with most of the languages below--this program ...
How do I print debug messages in the Google Chrome JavaScript Console?
...nsole.js, and I use for the same purpose. I create a noop console using an array of function names, what is in my opinion a very convenient way to do this, and I took care of Internet Explorer, which has a console.log function, but no console.debug:
// Create a noop console object if the browser d...
UIButton: set image for selected-highlighted state
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The array version didn't work for me. (at least during setImage)
– huggie
Apr 25 '16 at 7:46
1
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Simple Pivot Table to Count Unique Values
...technique. I didn't know about this one. You can do the same thing with an array function =IF(SUM((A$2:A2=A2)*(B$2:B2=B2)) > 1, 0, 1) (press Ctrl-Shift-Enter when entering the formula so it acquires {} around it).
– ErikE
Feb 10 '13 at 8:07
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How to convert string to boolean php
... (zero)
the float 0.0 (zero)
the empty string, and the string "0"
an array with zero elements
an object with zero member variables (PHP 4 only)
the special type NULL (including unset variables)
SimpleXML objects created from empty tags
Every other value is considered TRUE (includ...
How can I configure Logback to log different levels for a logger to different destinations?
...ingEvent = (LoggingEvent) event;
List<Level> eventsToKeep = Arrays.asList(Level.TRACE, Level.DEBUG, Level.INFO);
if (eventsToKeep.contains(loggingEvent.getLevel()))
{
return FilterReply.NEUTRAL;
}
else
{
return FilterRepl...
Is it more efficient to copy a vector by reserving and copying, or by creating and swapping? [duplic
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Good, it works. But it's not working for an array of vectors: for e.g: vector<int> A[n];
– ABcDexter
Dec 28 '14 at 7:51
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File Upload using AngularJS
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Safari 6.1
Note : readAsBinaryString() method is deprecated and readAsArrayBuffer() should be used instead.
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Difference of keywords 'typename' and 'class' in templates?
...template that should accept any type as T, including built-ins (such as an array )
template<typename T>
class Foo { ... }
For a template that will only work where T is a real class.
template<class T>
class Foo { ... }
But keep in mind that this is purely a style thing some people u...