zhangchaosheng

`function doSome(str){ let arr = str.replace(/，/g,',').split(','); if( arr.length == 0 ) return ''; if( arr.length == 1 ) return arr[0]; let result = []; let temp = arr[0]; let key...

数组的toString方法，拿到数据，split，unique，sort `let arr = [ [1, 2, 2], [3, 4, 5, 5], [6, 7, 8, 9, [11, 12, [12, 13, [14] ] ] ], 10]; let arrStr = arr.toString(); let...

I want to know how to draw the whole audio waveform directly. I hope you can help me answer the questions. Thank you. Is it the HTML 5 API or...