Use records of operators & | in js, and js Operators

Use records of operators & | in js, and js Operators

These two operators are often used. They are always mixed and recorded...

A () & B (): If true is returned after a () is executed, B () is executed and the value of B is returned. If false is returned after a () is executed, then the entire expression returns the value of a (), and B () is not executed;
A () | B (): If true is returned after a () is executed, the entire expression returns the value of a (). B () is not executed. If a () is executed () if false is returned, B () is executed and the value of B () is returned;
& The priority is higher than |

The Code is as follows:

Alert (1 & 3 | 0) & 4); // Result 4 ①
Alert (1 & 3 | 0 & 4); // result 3 ②
Alert (0 & 3 | 1 & 4); // Result 4 ③

Analysis

Statement ①: 1 & 3 returns 3 => 3 | 0 returns 3 => 3 & 4 returns 4
Statement ②: Execute 1 & 3 first, return 3, return 0 in execution 0 & 4, and finally compare 3 | 0 returns 3
Statement ③: Execute 0 & 3 first, return 0, return 4 in execution 1 & 4, and finally compare 0 | 4 returns 4

Note: All integers other than 0 are true, and undefined, null, and null strings "" are false.

Is the explanation of logical operators in Js correct?

& In the numeric operation, if the two binary numbers are 1100,101, and the two identical bits are 1, then the bits are 1. Otherwise, the bits are 0, and the result is 1000, in the condition calculation, the result is the same as &, and & will return false when the first result is false, and & will return the value after both expressions are calculated, but the result is the same.

| In bitwise OR numeric operations, if two binary numbers are 1100,101 0, one of the two identical bits is 1, and the other is 1, the result is 1110.
In conditional operations, the result is the same as |. The difference is: | true is returned when the first expression is true, and | two expressions before and after are calculated, even if the first expression is true, the second expression is calculated, but the result is the same.

What is the operator + = in js?

It is a short form. a + = B is a = a + B. There is no difference between the two writing methods. What's more, the former is a little less than the latter's code, looks professional!