Reputation: 111112
Lets say I have the following Deferred setting:
var dfr = new Deferred()
dfr.done(step1)
.then(step2)
.then(step3)
is there a way to pass the result of step2
into step3
.
Upvotes: 1
Views: 71
Reputation: 347
Yes you can pass the result .lets see an example of downloading the files so that it will be clear to you..
fun5().then(
function (msg) {
if(msg==='m1'){
var dfd1 = $.Deferred(function (dfd1){
//alert("called2");
var remoteFile = "http://www.freegreatdesign.com/files/images/6/2921-large-apple-icon-png-3.jpg";
var localFileName = remoteFile.substring(remoteFile.lastIndexOf('/')+1);
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, function(fileSystem) {
fileSystem.root.getFile(localFileName, {create: true, exclusive: false}, function(fileEntry) {
var localPath = fileEntry.fullPath;
if (device.platform === "Android" && localPath.indexOf("file://") === 0) {
localPath = localPath.substring(7);
}
var ft = new FileTransfer();
ft.download(remoteFile, localPath, function(entry) {
dfd1.resolve('m2');
// Do what you want with successful file downloaded and then
// call the method again to get the next file
//downloadFile();
}, fail);
}, fail);
}, fail);
//alert("In 2");
});
}
return dfd1.promise();
}).then(
function (msg) {
if(msg==='m2'){
var dfd2 = $.Deferred(function (dfd2){
//alert("called3");
var remoteFile = "http://www.freegreatdesign.com/files/images/6/2921-large-apple-icon-png-3.jpg";
var localFileName = remoteFile.substring(remoteFile.lastIndexOf('/')+1);
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, function(fileSystem) {
fileSystem.root.getFile(localFileName, {create: true, exclusive: false}, function(fileEntry) {
var localPath = fileEntry.fullPath;
if (device.platform === "Android" && localPath.indexOf("file://") === 0) {
localPath = localPath.substring(7);
}
var ft = new FileTransfer();
ft.download(remoteFile, localPath, function(entry) {
dfd2.resolve('m3');
// Do what you want with successful file downloaded and then
// call the method again to get the next file
//downloadFile();
}, fail);
}, fail);
}, fail);
//alert("In 3");
});
}
return dfd2.promise();
})
Upvotes: 1
Reputation: 18078
Yes.
Assuming step1
, step2
and step3
to be javascript functions, then simply get step2
to return its result and it automatically becomes a parameter passed to step3
.
Upvotes: 1