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Include all existing fields and add new fields to document
I would like to define a $project aggregation stage where I can instruct it to add a new field and include all existing fields, without having to list all the existing fields.
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Submitting a multidimensional array via POST with php
...number of columns (ex. top diameter, bottom diameter, fabric, colour, quantity), but has an unknown number of rows, as users can add rows as they need.
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How do I look inside a Python object?
...and dir() are particularly useful for inspecting the type of an object and its set of attributes, respectively.
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Double Negation in C++
I just came onto a project with a pretty huge code base.
14 Answers
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Scala best way of turning a Collection into a Map-by-key?
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edited Oct 20 '16 at 10:47
answered Jul 14 '10 at 18:56
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Installing older version of R package
...ackage that are not yet reflected in Rpy2 (for example, see this post (Edit: Link is now dead)).
7 Answers
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Remove duplicates from an array of objects in JavaScript
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A primitive method would be:
var obj = {};
for ( var i=0, len=things.thing.length; i < len; i++ )
obj[things.thing[i]['place']] = things.thing[i];
things.thing = new Array();
for ( var key in obj )
things.thing.push(o...
Can Objective-C switch on NSString?
Is there a more intelligent way to rewrite this?
13 Answers
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Constants in Objective-C
...Constants.m should be added to your application/framework's target so that it is linked in to the final product.
The advantage of using string constants instead of #define'd constants is that you can test for equality using pointer comparison (stringInstance == MyFirstConstant) which is much faster...
How can I access “static” class variables within class methods in Python?
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edited Dec 2 '12 at 7:34
Pavel Strakhov
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