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 ...
in css, when writing a Chinese character in a container with a fixed height, I most often use the same height and row height settings to deal with it. Recently, I found a problem and don t know how to deal with it. style (the most basic page, only on...
problem description use pyspider to crawl data today. The page needs to both turn the page and get the data on the page URL is http: www.cstc.org.cn temple.. wrote a total of two versions of the code, version 1 will cause the web page to report t...
I want to set a global variable userInfo, in app.wpy and call in the mine page. can be printed out, but I don t know how to call it on other pages. I use the wepy framework, and some of the code is written differently. Ask for advice . ...
what is the use of the id attribute set in the HTML tag, and why can I access the element directly with the id value? < hr > as follows: I set id= "text " on a textarea I can directly use text as a variable, the same as document.getEle...
axios version: ^ 0.17.1, error code location: currently there is an error when executing axios (), and the axios component is introduced. how to solve this problem ...