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/ 9 Years ago, wed, december 16, 2015, 12:00:00
I want to make sure I am not missing a trick; in Kris Kowal's library, you can do the following as a generic catch statement in promises:
var a, b, c, d, e, f;
readFile('fileA')
.then(function (res) {
a = res;
return readFile('fileB');
})
.then(function (res) {
b = res;
return readFile('fileC');
})
.then(function (res) {
c = res;
return readFile('fileD');
})
.then(function (res) {
d = res;
return readFile('fileE');
})
.then(function (res) {
e = res;
return readFile('fileF');
})
.then(function () {
f = res;
})
.catch(function () {
// error happened in file read *somewhere* (don't care where)
});
In jQuery's deferred objects, there is no catch statement, instead, I have to do this:
var a, b, c, d, e, f;
readFile('fileA')
.then(function (res) {
a = res;
return readFile('fileB');
})
.fail(function () {
// error happened in file read *somewhere* (don't care where)
})
.then(function (res) {
b = res;
return readFile('fileC');
})
.fail(function () {
// error happened in file read *somewhere* (don't care where)
})
.then(function (res) {
c = res;
return readFile('fileD');
})
.fail(function () {
// error happened in file read *somewhere* (don't care where)
})
.then(function (res) {
d = res;
return readFile('fileE');
})
.fail(function () {
// error happened in file read *somewhere* (don't care where)
})
.then(function (res) {
e = res;
return readFile('fileF');
})
.fail(function () {
// error happened in file read *somewhere* (don't care where)
})
.then(function (res) {
f = res;
return readFile('fileF');
})
.fail(function () {
// error happened in file read *somewhere* (don't care where)
});
Unfortunately, each then branch has unique logic. Am I missing something, or is the jQuery variation above the only way to achieve the equivalent in Kris Kowal's q library?
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