write_object

File write_object(Struct|Object)

Writes a tab-separated value (TSV) file with the contents of a Object or Struct. The file contains two tab-delimited lines. The first line is the names of the members, and the second line is the corresponding values. Each line is terminated by the newline (\n) character. The ordering of the columns is unspecified.

The member values must be serializable to strings, meaning that only primitive types are supported. Attempting to write a Struct or Object that has a compound member value results in an error.

Parameters

1. Struct|Object: An object to write.

Returns: A File.

Example: write_object_task.wdl

version 1.3

task write_object {
  input {
    Object obj
  }

  command <<<
    cut -f 1 ~{write_object(obj)}
  >>>

  output {
    Array[String] results = read_lines(stdout())
  }
}

{
  "write_object.obj": {
    "key_1": "value_1",
    "key_2": "value_2",
    "key_3": "value_3"
  }
}

{
  "write_object.results": ["key_1", "value_1"]
}

The actual command line might look like:

cut -f 1 /path/to/input.tsv

If obj has the following members:

Then /path/to/input.tsv will contain:

key_1\tkey_2\tkey_3
value_1\tvalue_2\tvalue_3