This is a result of The Equality Operator You Are Looking For (P2468). The comparison changes in C++20 – which allow a == b and a != b to find rewritten and synthesized candidates – can break a lot of C++17 code. You can see some examples in the paper. In an effort to mitigate … Read more
You’re looking for the Max function I think…. var c = Math.max(a, b); This function will take more than two parameters as well: console.log(Math.max(4,76,92,3,4,12,9)); //outputs 92 If you have a array of arbitrary length to run through max, you can use apply… var arrayOfNumbers = [4,76,92,3,4,12,9]; console.log(Math.max.apply(null, arrayOfNumbers)); //outputs 92 OR if you’re using ES2015+ … Read more
As far as I know there is no such operator in JavaScript but you can use Math.sign() function: Math.sign(a – b); NOTE: As was mentioned in comments, Math.sign() is not currently supported by all browsers. Check for compatibility (MDN).
The wording has changed in various editions of the C++ standard, and in the recent draft cited in the question. (See my comments on the question for the gory details.) C++11 says: Other pointer comparisons are unspecified. C++17 says: Otherwise, neither pointer compares greater than the other. The latest draft, cited in the question, says: … Read more
You are running into comparison operator chaining; 1 in () == False does not mean (1 in ()) == False. Rather, comparisons are chained and the expression really means: (1 in ()) and (() == False) Because (1 in ()) is already false, the second half of the chained expression is ignored altogether (since False … Read more
From the SymPy documentation == represents exact structural equality testing. “Exact” here means that two expressions will compare equal with == only if they are exactly equal structurally. Here, (x+1)^2 and x^2+2x+1 are not the same symbolically. One is the power of an addition of two terms, and the other is the addition of three … Read more
I feel an answer with easily verifiable evidence would be best. These operations are so small that it is difficult to performance test them. == 1648 true === 1629 true control test 1575 true If you subtract off the control test, it looks like there is a ~30% difference in their speeds on my browser. … Read more
Empty strings are “falsy” (python 2 or python 3 reference), which means they are considered false in a Boolean context, so you can just do this: if not myString: This is the preferred way if you know that your variable is a string. If your variable could also be some other type then you should … Read more
Surprisingly, C++98 and C++11 didn’t say that you can compare a iterator with a const_iterator. This leads to LWG issue 179 and LWG issue 2263. Now in C++14, this is explicitly permitted by § 23.2.1[container.requirements.general]p7 In the expressions i == j i != j i < j i <= j i >= j i > … Read more
It’s supposed to be symmetric. However, there is an asymmetric case in some versions of IE: window == document; // true document == window; // false