async-waterfall | isolated async waterfall module for JavaScript | Reactive Programming library
kandi X-RAY | async-waterfall Summary
kandi X-RAY | async-waterfall Summary
:fountain: Simple, isolated async waterfall module for JavaScript. Zero dependencies. Runs a list of tasks, passing the results of each into the next one.
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async-waterfall Examples and Code Snippets
Community Discussions
Trending Discussions on async-waterfall
QUESTION
I simply want to fetch the details from a document called 'slt_timesheet'. And I'm using async-waterfall to run 2-3 function in a sequence.
If I use the 'get' method to get the details of slt_timesheet then I got all the details regarding my slt-timesheet but if I use async-waterfall I am unable to get the details from document.
...ANSWER
Answered 2019-Jul-07 at 09:32findOne
method is an asynchronous call and you are calling it without callback. Try calling findOne
with either callback or promises.
QUESTION
Based on the answer here, which has async waterfall based on a condition inside another parent waterfall.
How would the arguments passing work while passing arguments to the function(condition, callback){}
in the following.
ANSWER
Answered 2018-Jun-05 at 11:53I used async.apply to pass the arguments to the callTest1 function.
eg: async.apply(callTest1.bind(self), arg1, arg2)
where callTest1
takes arguments in the order: (arg1, arg2, callback)
QUESTION
I'm planning on using a set of a little bit more sophisticated conventions to import assets in my webpack project. So I'm trying to write a plugin that should rewrite parts of requested module locators and then pass that down the resolver waterfall.
Let's assume we just want to
- check if a requested module starts with the
#
character and - if so, replace that with
./lib/
. The new module locator should now be looked up by the default resolver.
This means when a file /var/www/source.js
does require("#example")
, it should then actually get /var/www/lib/example.js
.
So far I've figured out I'm apparently supposed to use the module
event hook for this purpose. That's also the way chosen by other answers which unfortunately did not help me too much.
So this is my take on the custom resolve plugin, it's pretty straightforward:
...ANSWER
Answered 2018-Mar-26 at 09:51Update: Note that the plugin architecture changed significantly in webpack 4. The code below will no longer work on current webpack versions.
If you're interested in a webpack 4 compliant version, leave a comment and I'll add it to this answer.
I've found the solution, it was mainly triggered by reading the small doResolve()
line in the docs.
The solution was a multiple-step process:
1. Running callback()
is not sufficient to continue the waterfall.
To pass the resolving task back to webpack, I needed to replace
QUESTION
I have a following object in my node,js module, named data:
...ANSWER
Answered 2017-Oct-11 at 23:31This would be better achieved if you were using promises, or async/await, or generator syntax.
With callbacks, use a counter variable to keep track of how many requests you're sending and wait for the counter to reach a certain value before calling processData
.
QUESTION
I know this is a topic that has been brought up here before, but I'm using async.waterfall with rethinkdb and I'm getting Error: Callback was already called
. The odd part is that even though it throws that error and crashes the app, it still will create the database and tables I need. I have read a few other post with answers like NodeJS Async: Callback already called? or Using async.waterfall, but I can't seem to get anywhere. My console also tells me the error is at db.js:40:9
, but I'm new to Node and just not sure what it wants with the callbacks. What am I doing wrong? Do I need to nest my callbacks here? The code I am using is posted below. Any help I can get here is greatly appreciated and if need be I can post other relevant code. Thanks guys.
db.js:
...ANSWER
Answered 2017-May-25 at 08:20This is a common problem for those trying out "async.waterfall".
Here is the solution by spliting "createTable", "createIndex" and "waitForIndex" into 2 functions each:
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No vulnerabilities reported
Install async-waterfall
npm install async-waterfall if you’re using node.js.
component install es128/async-waterfall if you’re using component(1).
bower install async-waterfall if you’re using Twitter Bower.
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