topic description for example, the first group is: A B C D E and the second group is: 1 2 3 4 the numbers of the two groups are not necessarily symmetrical, and the number of the first group may be more or less than that of the second group. An exam...
encounters a javascript algorithm problem, which requires that find out all prime factors of a number algorithm I designed: function primeFactors(n){ var factors = []; var divisor = 3; if (n % 2==0) factors.push(2); while(n>5){ ...
problem description there is a filtering table, but it can only be filtered according to one condition. Here, we have made a multi-selection selector, hoping to achieve multi-conditional filtering . related codes <template> <div class=&qu...
the exception that vue better-scroll rolls to the bottom when a new message is loaded. let disY=60; scrolls normally let disY= el [el.length-1] .clientHeight; this makes scrolling unusual. See the picture below for details. RequestAxios(comment,f...
I only printed the whole page 22222222 once. Why are there two at the same time, and all clicks are executed twice? ...
I do front-end development, the company develops under linux environment, I install centos6.9 through virtualbox in windows system, use virtualbox to set up a shared folder ( sudo mount-t vboxsf centosShare ~ centosShare ), and can modify fi...
Why do you add @ NotBlank to verify that it is not empty? what is the principle? ...