In these cases the error message will print out some Value as a column, but for compound data fields not finding a match isĪn error. Scalar values have an automatic fallback handler that just outputs the (Just the first matching action is taken). Of a patterns and the action to take for values whose path matches Pass in multiple -path command line options, each containing a pair
Or by the values developing some kind of complicated internal structure.īoth of those actually happen for this tool. Ordering dependencies between flags (to express different semantics) Though they'll often eventually become complex either by developing What kind of options do we have forĭoing that? Command line flags tend to be the simplest to start with, The first interpretation would not work at all, while in the latterĬase you'd get really awkward entity-attribute-value-style output. Rows to another CSV file (sales in the example). A compound value could meanĮither the addition of more columns (ratings in the example) or adding Only question is how to configure the generic mechanism for theĬould this "just work" out of the box with no settings at all? That one app (the documentation is as long as the program itself). It'sĪlmost easier to just have a generic converter than one specific for That would have been a bit annoying since theĬSV output codepath would have been basically completely separate fromĪ JSON::encode_json on the natural data structure. One way to do this would have been to just change the program I used To be provided as multiple CSV files that can be joinedĪs a simplified example, instead of this: The statistics package they were using could not import JSONįiles with any non-trivial structure. I needed to produce some data for someone else to analyze, but Second, this is as good an excuse as any to start talking a bit about some patterns in how command line programs get told what to do (I'd use the word "configured", except that's not quite right). Did I just somehow manage to miss all the good ones? Or is this truly something that nobody has ever needed to do? Lots of converters to other formats, all of which seem to assume the JSON is effectively going to be a list of records, but none that supported arbitrary nesting. The first one is that I spent an hour looking for an existing tool that did this and didn't find one. It's the kind of dime a dozen data munging tool that's too trivial to talk about, but I'll write a bit anyway for a couple of reasons. Json-to-multicsv is a little program to convert a JSON file to one or more CSV files in a way that preserves the hierarchical structure of nested objects and lists.
0 kommentar(er)
