index = Math.floor(Math.random() * tips.length);什么意思index = Math.floor(Math.random() * tips.length);什么意思.具体点阿!

index = Math.floor(Math.random() * tips.length);什么意思index = Math.floor(Math.random() * tips.length);什么意思.具体点阿! AE表达式m = thisComp.layer(文字库).text.sourceText;textSplit = m.split( );out = textSplit.length;v = Math.floor(linear(time,0,thisComp.duration,0,50))textSplit[v + index]前两句还能搞明白.后面的三句我就搞不明白是什么 Math.floor(Math.random() * 7 + JAVA中,％ == ＆＆ || Math.sqrt(x) Math.pow Math.floor(x) Math.round(x)各是什么意思?非常急 请问关于hough变换圆检测的问题% 搜索超过阈值的聚集点max_para = max(max(max(hough_space)));index = find(hough_space>=max_para*p);length = size(index);hough_circle = false(m,n);for i=1:ecountfor k=1:lengthpar3 = floor(index(k)/(m*n x = Math.floor(Math.random() *90)+10; 这是javascript里面的 求高手解析tmp =Math.floor(Math.random()*4);什么意思? urlx = Math.floor(Math.random()*799)+1; 怎么改成200-500之间的随机数! 关于一个AE倒计时的表达式问题rate = -1.1;clockStart = 5;function padZero(n){if (n) return + n else return + n}clockTime = Math.max(clockStart + rate*(time - inPoint),0);t = Math.floor(clockTime);min = Math.floor((t%3600)/60);sec = M for(index=0;index JS：var die = Math.floor(Math.random()*6 + 1); 为什么die的值会在1和6之间? matlab 中[~,index] = 老是说我else的地方语法错误,我到底错哪儿了?function monthdaycount(year,month){IF (month=2){IF ((year/400==Math.floor(year/400)) || (year/4==Math.floor(year/4) && (year/100!=Math.floor(year/100)))){ return 29; }else{ return 28; }}else matlab中的floor函数问题m=floor(wp*M) wpa=wp*M-m在0 js里面的这个表达式是什么意思?speed=speed>0?math.ceil（speed）：mjs里面的这个表达式是什么意思?speed=speed>0?math.ceil（speed）：math.floor（speed） 写as3注释请为我下面的代码写注释 var i:int=0;var a:Array=new Array(0x33ccff,0xff0000,0x00ff00,0xff99ff);addEventListener(Event.ENTER_FRAME,f);function f(e:Event):void {var index:int=int(Math.random()*5);drawF(Math.random()*12+40,a[index] 1.Tommy's math book is on the floor.对on the floor提问. matlab index=[k+1: