布线按V即可插入过孔,但在铺铜,或大电流走线时,有时需要手动添加一些过孔. 但Kicad里面并没有这样的菜单,最后搜索到,要添加过孔时,需要先建立一个单过孔的封装. 然后插入这个封装到PCB.然后修改焊盘的网络名为我们需要的,如GND. 这样就手动插入了一个过孔.然后通过复制及复制为array的功能快速复制为多个. 视频地址:Faking via stitching in KiCad
Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] inclusive that do not appear in this array. Could you do it without extra space and in O(n) runtime?