I love Elm and I strongly believe that it's the future, but I can't solve
this one use-case that's stopping me from using it.
I have a list of JSON objects like this:
[{a: 1, foo: "bar", bar: "baz"},
{a: 2, foo: "baz", bar: "foo"},
{a: 34, foo: "big", bar: "lebowski"}]
At runtime the code has no idea the types of the fields, the names of the
fields, the number of fields, nor the number of records.
I can decode this easily in Javascript, Coffeescript, etc. How do I decode
it in elm?
I produce reports in Javascript by pivoting the data. I do not know at
compile time what the field names are. In Javascript I can simply do the
following to find the relevant field names:
var foo = JSON.parse(string);
var keys = [];
for(var k in foo[0]) keys.push(k);
then later I can iterate through the records and pull out the relevant data
doing something like so:
for(var i=0;i<foo.length;i++){
var rec = foo[i];
for(var j=0;j<keys.length;j++){
var d = rec[keys[j]];
// Do amazingly interesting things here.
}
}
I can then manipulate that data based on user input in many different ways.
In Javascript I certainly do not have to know field names, number of
fields, or number of records to do interesting things with the data. In
fact, I do this every day to generate reports, charts, etc. I can certainly
send data from the server that describes field names, field types, etc.,
but everything needs to be done runtime as I do it in JS or Coffeescript.
Thanks in advance!
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