Scan first 100 characters, count commas and tabs. Whichever one wins is the separator.

Given a csv, produce a sequence of maps. This is mainly to be used for specific use cases like processing the data. For large datasets that you intend to do pandas-style dataset processing, please see tech.ml.dataset. If the input is not a reader, the sequence is completely read so the input stream can be closed. If the input is a reader, a lazy sequence of maps is returned.

The delimiter is auto-detected by scanning the first 100 or so characters. :separator - hard set csv separator to use. :skip-autodetect - Don’t autodetect, use ‘,’ as separator.

Delete a resource. Works currently with file or s3.

Boolean existence check. Works with everything as fallback is to open an input stream and then close it.

Wrapper around

Get edn data from a url

Read json. Options are used both for constructing input stream and passed into the json read method. See documentation for clojure.data.json/read

Get nippy data from a url

Get object always returns something convertible to an input-stream. It may return a file for instance.

thing->input-stream conversion. Falls back to clojure.java.io if url is not a string url

Copy first to a temp, then do an atomic move to the destination. This avoids issues with partial files showing up where they shouldn’t and a failed io operation leading to incomplete results.

Return a directory listing. May be recursive if desired; only works with file or s3 providers.

Given a sequence of maps, produce a csv or tsv. Options are passed via apply to clojure.data.csv/write-csv. Valid options for this method are: :key-printer - default print method to use else default-csv-key-printer :key-seq - ordered sequence of keys to pull out of the maps. Defaults to sorted order of printed keys of the first map. :separator - Which separator to use, defaults to ‘,’

If supported, returns at least :modify-date and :byte-length. Exception otherwise.

thing->output-stream conversion. Falls back to clojure.java.io if url is not a string url.

Put edn data to a url

Will throw if an image with transparency is used to write a jpeg

Write json. Options are used both for constructing the output stream and passed into the json write method. See documentation for clojure.data.json/write.

Put nippy data to a url

Put object. Object must be a byte-array, a file, or an input-stream. Strings will be interpreted as per the rules of clojure.java.io/input-stream. The most optimizations will apply to either files or byte arrays.

Create a java.io.reader from a thing.

Create a java.io.writer from a thing.