安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
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- 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
- 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
- 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 –
- c - What does tilde (~) operator do? - Stack Overflow
The ~ operator in C++ (and other C-like languages like C and Java) performs a bitwise NOT operation - all the 1 bits in the operand are set to 0 and all the 0 bits in the operand are set to 1 In other words, it creates the complement of the original number
- 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 `%` (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)
- 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
- What are bitwise shift (bit-shift) operators and how do they work?
Unsigned Right Shift(>>>): This operator also shifts bits to the right The difference between signed and unsigned is the latter fills the leading bits with 1 if the number is negative and the former fills zero in either case Now the question arises why we need unsigned right operation if we get the desired output by signed right shift operator
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