Im using a WordPress transient, which expires after an hour, to store a value which is an integer. Im trying to use switch() and multiple case() statements to evaluate if the transient exists or not (i.e true or false). Here are my questions: Which comparison operator (=, ==, ===), in example 2, is ideal for … Read more
My editor warns me when I compare my_var == None, but no warning when I use my_var is None. I did a test in the Python shell and determined both are valid syntax, but my editor seems to be saying that my_var is None is preferred. Is this the case, and if so, why? 6 … Read more
I am trying to figure out a way of checking for the existence of a value in an array without iterating through the array. I am reading a file for a parameter. I have a long list of parameters I do not want to deal with. I placed these unwanted parameters in an array @badparams. … Read more
Comparing string in C# is pretty simple. In fact there are several ways to do it. I have listed some in the block below. What I am curious about are the differences between them and when one should be used over the others? Should one be avoided at all costs? Are there more I haven’t … Read more
This question already has answers here: Comparing two collections for equality irrespective of the order of items in them (20 answers) Closed 4 years ago. Yet another list-comparing question. List<MyType> list1; List<MyType> list2; I need to check that they both have the same elements, regardless of their position within the list. Each MyType object may … Read more
so I want to use a switch statement like this: switch (scrollLeft) { case (<1000): //do stuff break; case (>1000 && <2000): //do stuff break; } Now I know that either of those statements (<1000) or (>1000 && <2000) won’t work (for different reasons, obviously). What I’m asking is the most efficient way to do … Read more
I have two dictionaries, but for simplification, I will take these two: >>> x = dict(a=1, b=2) >>> y = dict(a=2, b=2) Now, I want to compare whether each key, value pair in x has the same corresponding value in y. So I wrote this: >>> for x_values, y_values in zip(x.iteritems(), y.iteritems()): if x_values == … Read more
Given two inclusive ranges [x1:x2] and [y1:y2], where x1 ≤ x2 and y1 ≤ y2, what is the most efficient way to test whether there is any overlap of the two ranges? A simple implementation is as follows: bool testOverlap(int x1, int x2, int y1, int y2) { return (x1 >= y1 && x1 <= … Read more
This question already has answers here: How to efficiently compare two unordered lists (not sets) in Python? (10 answers) Closed 5 years ago. I’m looking for an easy (and quick) way to determine if two unordered lists contain the same elements: For example: [‘one’, ‘two’, ‘three’] == [‘one’, ‘two’, ‘three’] : true [‘one’, ‘two’, ‘three’] … Read more
Why do comparisons of NaN values behave differently from all other values? That is, all comparisons with the operators ==, <=, >=, <, > where one or both values is NaN returns false, contrary to the behaviour of all other values. I suppose this simplifies numerical computations in some way, but I couldn’t find an … Read more
