Brief linkFly的<JavaScript-如果...没有方法>中提及如何手写Math.round方法,各种奇技淫招看着十分过瘾,最让我惊叹的是 ~~(x + )) ,完全通过加法和位运算搞定整数的四舍五入.在好奇心的驱使下重温了一下位运算,并对上述公式加以封装得到适合小数的四舍五入方法 function round(v/*alue*/, p/*recision*/){ p = Math.pow(, p>>> ? : p|) v *= p )|) / p } 在开波前…
1 Verilog 1.1 Bitwise operator Bitwise operators perform a bit wise operation on two operands. They take each bit in one operand and perform the operation with the corresponding bit in the other operand. If one operand is shorter than the other, it w…
js bitwise operation all in one 位运算 & 按位与 | 按位或 ^ 按位异或 / XOR let a = 5; // 00000000000000000000000000000101 a ^= 3; // 00000000000000000000000000000011 console.log(a); // 00000000000000000000000000000110 let b = 5; // 00000000000000000000000000000101…
Given a linked list, swap every two adjacent nodes and return its head. For example, Given 1->2->3->4, you should return the list as 2->1->4->3. Your algorithm should use only constant space. You may not modify the values in the list, on…
→-→Ln-1→Ln, reorder it to: L→Ln-2→- You must do this in-place without altering the nodes' values. For example, Given {1,2,3,4}, reorder itto {1,4,2,3}. Considering the following steps: * 1. split such list into two list, first and second, according…
"|" can be used as assign "&" can be used as check // Read, Write, Execute // 0100 Read // 0010 Wirte // 0001 Execute ; ; ; let myPremission= ; myPremission = myPremission | read | write; // 6 -- 0110 let message = (myPresmission &…
