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- math - What does the ^ (XOR) operator do? - Stack Overflow
The XOR ( ^) is an logical operator that will return 1 when the bits are different and 0 elsewhere A negative number is stored in binary as two's complement In 2's complement, The leftmost bit position is reserved for the sign of the value (positive or negative) and doesn't contribute towards the value of number
- What does lt; gt; (angle brackets) mean in MS-SQL Server?
<> operator means not equal to in MS SQL It compares two expressions (a comparison operator) When you compare nonnull expressions, the result is TRUE if the left operand is not equal to the right operand; otherwise, the result is FALSE If either or both operands are NULL, see the topic SET ANSI_NULLS (Transact-SQL) See here : Not Equal To
- How do you use the ? : (conditional) operator in JavaScript?
Just to clarify the name: ternary is the type of operator (i e it has 3 parts) The name of that specific ternary operator is the conditional operator There just happens to only be one ternary operator in JS so the terms get misused –
- When should I use ?? (nullish coalescing) vs || (logical OR)?
The ?? operator was added to TypeScript 3 7 back in November 2019 And more recently, the ?? operator was included in ES2020, which is supported by Node 14 (released in April 2020) When the nullish coalescing operator ?? is supported, I typically use it instead of the OR operator || (unless there's a good reason not to)
- What does the `%` (percent) operator mean? - Stack Overflow
Note that the result of the % operator is equal to x – (x y) * y and that if y is zero, a DivideByZeroException is thrown If x and y are non-integer values x % y is computed as x – n * y, where n is the largest possible integer that is less than or equal to x y (more details in the C# 4 0 Specification in section 7 8 3 Remainder operator)
- Which equals operator (== vs ===) should be used in JavaScript . . .
The === operator is called a strict comparison operator, it does differ from the == operator Lets take 2 vars a and b For "a == b" to evaluate to true a and b need to be the same value In the case of "a === b" a and b must be the same value and also the same type for it to evaluate to true Take the following example
- What does the !! (double exclamation mark) operator do in JavaScript . . .
I don't consider any of your alternatives easy to understand Worse, there is at least one case where using equality operator x != 0 gives a different result than Boolean(x) or !!x: try [] for x Also, if you do like using equality operator, to get its "truthiness" rules, why wouldn't you do the more obvious (userId == true) instead of (userId
- What does the - gt; operator mean in C++? - Stack Overflow
The -> operator is used with a pointer (or pointer-like object) on the LHS and a structure or class member on the RHS (lhs->rhs) It is generally equivalent to (*lhs) rhs, which is the other way of accessing a member
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