我想访问我声明为全局数组的数组arrcolumn[]。我正在arrcolumn[]函数中初始化数组OnSuccess1()。我想在arrcolumn[]中使用OnSuccess()值在OnSuccess1（）中初始化后的arrcolumn[]函数。
但OnSuccess()函数中var arrname = [];
var arrmark = [];
var arrcolumn = [];
var arr = [];
var arr1 = [];
//display function
function display() {
$.ajax({
type: "POST",
url: "Default.aspx/fetchStudent",
data: '{}',
contentType: "application/json;charset=utf-8",
dataType: "json",
success: OnSuccess,
error: OnErrorCall
});
$.ajax({
type: "POST",
url: "Default.aspx/fetchcolumn",
data: '{}',
contentType: "application/json;charset=utf-8",
dataType: "json",
success: OnSuccess1,
error: OnErrorCall1
});
function OnSuccess1(response) {
var objdata1 = (response.d);
var pm1 = JSON.parse(objdata1);
var len1 = objdata1.length;
arr1 = $.map(pm1, function(n, i) {
var arr_temp1 = {
0: n.name
}
arrcolumn[i] = n.name;
return arr_temp1;
});
arrcolumn = jQuery.grep(arrcolumn, function(value) {
return value != removeItem;
});
arrcolumn = jQuery.grep(arrcolumn, function(value) {
return value != removeItem1;
});
alert(arrcolumn);
}
function OnErrorCall1(response) {
alert("unable to fecth");
}
function OnSuccess(response) {
var objdata = (response.d);
var pm = JSON.parse(objdata);
var len = objdata.length;
arr = $.map(pm, function(n, i) {
var arr_temp = {
0: n.name1,
1: n.os,
2: n.cn,
3: n.pns,
4: n.dbms,
5: n.se,
6: n.c
}
arrname[i] = n.name1;
arrmark[i] = [n.os, n.cn, n.pns, n.dbms, n.se, n.c];
return arr_temp;
});
//alert(arrcolumn);
alert(arrname);
alert(arrmark);
}
function OnErrorCall(response) {
alert("error occured");
}
}
为空。
hdfsDirectory="hdfs://srcPath"
val conf = new org.apache.hadoop.conf.Configuration()
val src:Path = new org.apache.hadoop.fs.Path(hdfsDirectory)
val fs = FileSystem.get(src.toUri,conf)
val srcPath: Path = new Path("hdfs://srcPath")
val srcFs =FileSystem.get(srcPath.toUri,conf)
val dstPath:Path =new Path("hdfs://targetPath/")
val dstFs =FileSystem.get(dstPath.toUri,conf)
val exists = fs.exists(new org.apache.hadoop.fs.Path(hdfsDirectory))
val status:Array[FileStatus] = fs.listStatus(new Path(hdfsDirectory))
if (status.length>0) {
status.foreach(x => {
println("My files: " + x.getPath)
FileUtil.copy(srcFs, x.getPath, dstFs, dstPath, true, conf)
println("Files moved !!" +x.getPath)
}
)}
else{
println("No Files Found !!")
}
答案 0 :(得分：1)
您无法保证在OnSuccess1之后调用OnSuccess。如果您在完成工作之前需要两条信息，则需要等待两个电话完成。
一个简单的方法是jQuery的$.when：
$.when(
$.ajax(/*...*/), // The first call
$.ajax(/*...*/) // The second call
).then(function(result1, result2) {
// Both calls are done now. Use `result1` (the result of the
// first call) and `result2` (the result of the second) here
});
调用将并行运行，但在两个调用完成之前，最后的处理程序将不会运行。