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How to find out what type of a Mat object is with Mat::type() in OpenCV
I am kind of confused with type() method of Mat object in OpenCV. If I have following lines:
6 Answers
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How to implement the factory method pattern in C++ correctly
... been making me feel uncomfortable for quite a long time, because I honestly don't know how to do it, even though it sounds simple:
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Is there a combination of “LIKE” and “IN” in SQL?
In SQL I (sadly) often have to use " LIKE " conditions due to databases that violate nearly every rule of normalization. I can't change that right now. But that's irrelevant to the question.
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Why does changing the sum order returns a different result?
Why does changing the sum order returns a different result?
6 Answers
6
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How do you add a Dictionary of items into another Dictionary
Arrays in Swift support the += operator to add the contents of one Array to another. Is there an easy way to do that for a dictionary?
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Generate a random date between two other dates
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Convert both strings to timestamps (in your chosen resolution, e.g. milliseconds, seconds, hours, days, whatever), subtract the earlier from the later, multiply your random number (assuming it is distributed in the range [0, 1]) with that difference, and add again...
Is there a query language for JSON?
Is there a (roughly) SQL or XQuery-like language for querying JSON?
22 Answers
22
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Single Line Nested For Loops
Wrote this function in python that transposes a matrix:
5 Answers
5
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What does = +_ mean in JavaScript
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r = +_;
+ tries to cast whatever _ is to a number.
_ is only a variable name (not an operator), it could be a, foo etc.
Example:
+"1"
cast "1" to pure number 1.
var _ = "1";
var r = +_;
r is now 1, not "1".
Moreover, according to the MDN page on Arithmetic Operators:
The...
Iterate over object attributes in python
I have a python object with several attributes and methods. I want to iterate over object attributes.
8 Answers
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