Comments (2)
Here's the easiest way I can think of:
step(
function f1() { find('foo',this); },
function f2(err,foo) {
if (!foo) { // if there's no foo, create it
create('foo', this)
} else { // Otherwise this step is a no-op
return foo; // Synchronously passed `foo` to the next step
}
},
function f3(err,foo) { print(foo); }
);
That said, there's been some discussions on how to make this use case a bit more readable as well as some libraries that implement the ideas discussed:
- https://github.com/Nordberg/node-twostep (seems to be dead [maybe it's moved?], but at one point it had creationix's stamp of approval)
- https://github.com/xavi-/two-step (my own creation, so be kind :])
from step.
Call a function outside of step to output final data..
ie,
step (
function one(){
if ( error or validaation error) ) return response(res, req, error)
//code
},
function two(){
//code
}.
function three(){
//code
}
)
function response(res, req, error) {
//Code
}
from step.
Related Issues (20)
- Problem if the first argument of a callback is not error HOT 2
- problem in 'throw arguments[0]' HOT 1
- A way to step back to previous HOT 1
- Can I preserve a callback across multiple steps? HOT 2
- Critical: Step is skipping steps! HOT 4
- Step is broken for use with Express.js! HOT 1
- Consider API for next major version of Step HOT 5
- Cancel a Step Sequence HOT 1
- Race condition in handling of group()-generated callbacks HOT 4
- Broken code in README (node v0.6.12)
- Missing instrunctions on how to run the tests HOT 1
- step ignores wrong javascript code silently HOT 5
- Please throw actual Errors, not strings HOT 2
- process.nextTick(check) in next.group could cause a bug of race condition HOT 1
- step is just no value, it's just a trick HOT 3
- Remove nextTick check for groups. HOT 3
- Change log HOT 4
- Please release 1.0.0 to npm HOT 2
- Returning multiple parameters in a callback that has been grouped HOT 5
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from step.