Question

在“holmesminutes”变量达到一定量后，如何在下面的for循环中执行if语句，例如60然后一旦达到60，它就会跳过其中一个数组项。所以例如在60分钟之后，循环应该在Peacock上的数组项目，但我希望它跳过它并将“Scarlett”放60分钟。然后，我需要在100分钟后再次这样做。

document.write('<table id="myTable1" border="1" cellspacing="1" cellpadding="5">');
var clients = new Array("Mustard","Plum","Green","Peacock","Scarlett","White");
var indexCounter, 
    holmesminutes =0, 
    tableId1 =0;

for (var repeatCounter = 0; 
            repeatCounter < 5 && holmesminutes < 315; repeatCounter++) 
{
    for (indexCounter = 0;  holmesminutes < 315; indexCounter++) 
    {
        document.write("<tr>");
        tableId1 = tableId1 + 1;
        document.write('<td id="' + tableId1 + '">' 
                            + clients[indexCounter] + '</td>');
        document.write("<td> Holmes </td>");
        holmesminutes = holmesminutes + 15;
        document.write("<td>" + holmesminutes + "</td> </tr>");
    }
}
document.write("</table> <br>");

Answer 1

如果您的控制变量是holmesminutes，那么理解您的代码要简单得多。

如果您需要在100之后跳过一次，只需跳过105.

indexCounter = 0;
MAX_CLIENTS = clients.length;

for (var holmesminutes = 0; holmesminutes < 315; holmesminutes += 15) 
{
    if (holmesminutes != 60 && holmesminutes != 105) {
        tableId1 = tableId1 + 1;
        document.write("<tr>");
        document.write('<td id="' + tableId1 + '">' + 
                       clients[indexCounter] + '</td>');
        document.write("<td> Holmes </td>");
        document.write("<td>" + holmesminutes + "</td> </tr>");
    }
    indexCounter += 1;
    if (indexCounter == MAX_CLIENTS) indexCounter = 0;
}

我不确定您是否要在显示所有客户端或想要重新开始时退出。如果您想退出，只需更改为if (indexCounter == MAX_CLIENTS) break;

Answer 2

像这样使用breaks;

<script>
    var counter = 0, full_breakpoint = 15, inner_break = 8;

    for(var a = 0; a<10; ++a){

        for(var b = 0; b<10; ++b){

            counter++;

            if(counter >= full_breakpoint) {
                console.log("full_breakpoint in <b>loop = " + counter);
                break;
            }else if(counter == inner_break){
                console.log("inner_break in <b>loop  = " + counter);
                break;
            }else console.log("no break = " + counter);

        }


        if(counter >= full_breakpoint){
            console.log("outter <a> forloop at break_point = " + counter);
            break;
        }

    }
    console.log("finish " + counter);
</script>

输出;

no break = 1 javascript.html:16
no break = 2 javascript.html:16
no break = 3 javascript.html:16
no break = 4 javascript.html:16
no break = 5 javascript.html:16
no break = 6 javascript.html:16
no break = 7 javascript.html:16
inner_break in <b>loop  = 8 javascript.html:14
no break = 9 javascript.html:16
no break = 10 javascript.html:16
no break = 11 javascript.html:16
no break = 12 javascript.html:16
no break = 13 javascript.html:16
no break = 14 javascript.html:16
full_breakpoint in <b>loop = 15 javascript.html:11
outter <a> forloop at break_point = 15 javascript.html:22
finish 15

if if语句中的else语句

2 个答案: