按字母排序ToDoList-已完成或未完成的任务

Question

var taskList =[ 
{completed:false,task:"to home work"}, 
{completed:true,task:"test"},
{completed:true,task:"app"},
{completed:false,task:"doing work"},
{completed:false,task:"sleeping"}, 
{completed:true,task:"to do"},
{completed:true,task:"to home work"},
{completed:false,task:" work"},];

这是一个列表，如下所示

COMPLETED TASK           IMCOMPLE TASK
test                      to home work
app                       doing work
to do                     sleeping
to home work              work

现在，我想按字母顺序对每个列表进行排序-逐个排序而不影响其他列表

like
如果我想对完成的任务进行排序，则只需对列表进行排序就不要碰到不完整的任务。

Answer 1

您可以使用sort方法，而忽略对指定完成值的任务进行排序。

在此示例中，您可以将 true 传递给 sortTasks 函数以对已完成的任务进行排序，并 false 对未完成的任务进行排序。

        var taskList =[ 
          {completed:false,task:"z"}, 
          {completed:true,task:"d"},
          {completed:true,task:"c"},
          {completed:false,task:"y"},
          {completed:false,task:"x"}, 
          {completed:true,task:"b"},
          {completed:true,task:"a"},
          {completed:false,task:"w"},];
        
        function sortTasks(isCompleted) {
          return taskList.sort((a,b) => {
            if ((a.completed !== isCompleted) || (b.completed !== isCompleted)) return 0;
            if (a.task > b.task) return 1;
            if (b.task > a.task) return -1; 
          });
        }
    
      //console.log(sortTasks(true)); // sort completed tasks only
      // console.log(sortTasks(false))); // sort incomplete tasks only
      var newArray = sortTasks(true).filter(a => a.completed);
      console.log(newArray);