hassamullah
Cannot figure out NimbleCSV parser
In the first code snippet in the NimbleCSV Docs
NimbleCSV.define(MyParser, separator: “\t”, escape: “"”)
I don’t know where the MyParser variable comes form, kindly guide me
FYI, I’m new to elixir and still figuring out its ways
Most Liked
sodapopcan
Hello and welcome to the forums!
NimbleCSV uses a pattern that isn’t too common amongst libraries so your confusion is certainly understandable. MyParser is not a variable but an atom. What that line is doing is actually defining a module called MyParser which you can then use like so: MyParser.parse_string("foo,bar"). You can call MyParser whatever you want.
kip
MyParser isn’t a variable. It’s a module name (module names are also atoms).
The docs for nimble_csv show that NimbleCsv.define/2 actually defines a new module, using the name you provide (in the example, its MyParser) that implements a parser using the options you pass.
Thats why you call MyParser.parse_string/1 to do the actual parsing of some CSV data. MyParser is just a regular Elixir module that just happened to be generated for you.
Popular in Questions
Other popular topics
Latest on Elixir Forum
Sponsor Spotlight
Practical resources that improve the lives of professional developers. By developers, for developers.
Categories:
Sub Categories:
Forums
Our Sponsors
Build Elixir applications with speed and confidence.
Supporting innovation across the BEAM ecosystem.
We build reliable cloud platforms for business-critical systems.
Catch errors, track performance, monitor hosts and more.
Practical resources that improve the lives of professional developers.
Producing high quality Elixir screencasts since 2017.
Enabling companies to succeed by building software people love.
Courses that'll move you from confusion to "Aha, now I get it!"