function Demo(name) { this.name = name; } var getSingle = function(fn) { var result; return function() { console.log(arguments.length); return result || (result = fn.apply(this, arguments)); } }; const aa = new getSingle(D...
went to the interview last week, handwritten singleton class then I handwritten a more commonly used global setting class: import java.util.concurrent.locks.Lock; import java.util.concurrent.locks.ReentrantLock; public class Setting { private ...
druid may throw SqlException when creating a connection, but cannot capture ...
in the antd-pro project that I pulled down directly on git, the default is roadhog, which has already encapsulated webpack with one layer. excuse me: 1. Now I want to separate the development environment from the production environment. What can I do w...
Why struct.calcsize ( "5id ") is 32? struct RateInfo { time_t time; int open; int high,low,close; double vol; }; requires a struct such a...
as shown in the picture, red, is there something wrong ...
as shown in the figure the parent element of the list is positioned with fixed, but the list is exceeded. How can it be slid? <div class="commonClass" v-show="showCityList"> <div class="" v-for=&quo...