Re: Rise of Node

what I did (and it's probably wrong) was make those functions use

callbacks and then:

The collecting of a grouping of async things can be done for you with
things like Promise.all(). Even before Promises became a formal feature of
Javascript you could do it with external libraries like BlueBird.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/all

With Promises you could also create code that operated in sequential
fashion. These were the ways before async/await. My opinion is that
async/await should be used at this point because it cleans up the syntax so
much.


Aaron Bartell
IBM i hosting, starting at $157/month. litmis.com/spaces


On Mon, Mar 19, 2018 at 11:45 AM, Bradley Stone <bvstone@xxxxxxxxx> wrote:

On Mon, Mar 19, 2018 at 11:05 AM, Henrik Rützou <hr@xxxxxxxxxxxx> wrote:

Nathan,

you don't have to code async if there is no need for that - a simple

batch

process
that runs in its own instance hasn't other to compete with (so why

async?)-

so you
code that sync - exactly as you are used to.

be aware of that nearly all async functions in node has a sync

counterpart

const fs = require("fs")
fs.readFile <> fs.readFileSync
fs.writeFile <> fs.writeFileSync etc.

But the synch ones aren't supported or updated any more.. which is why IBM
suggest you use asynch.. which is weird. That's like every call to a
program, subprocedure or function is submitted to batch.. sometimes synch
is good.

I already had started a package to make db easier with node, and the
updates to asynch broke that.. what I did (and it's probably wrong) was
make those functions use callbacks and then:

myStuff.getResultSet(sql, function(rs) {
resultSet = rs;
finish();
});

myStuff.getFieldDescriptions(function(cl) {
columnList = cl
finish();
});

function finish() {
if (resultSet && columnList) {
// everything is done... so go ahead here and do whatever
}
}
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