The variations on “fold” let you condense a Scala collection into a single value. <\/p>\n
This example shows how you might find a named column in a CSV file, by calling “zip” on the list of headers and cells, then doing a lookup with foldLeft:<\/p>\n
\nval searchColumn = \"Name\"\nval headers = \"Name,Quantity,Amount\"\nval row = \"Gary,10,100\"\n\nheaders.split(\",\")\n .zip(\n row.split(\",\")\n ).foldLeft(\"\")(\n (prior, dataTuple) => {\n val (headerName, cell) = dataTuple\n if (headerName.equals(searchColumn)) cell else prior\n }\n )\n<\/pre>\n","protected":false},"excerpt":{"rendered":"The variations on “fold” let you condense a Scala collection into a single value. This example shows how you might find a named column in a CSV file, by calling “zip” on the list of headers and cells, then doing a lookup with foldLeft: val searchColumn = “Name” val headers = “Name,Quantity,Amount” val row = … <\/p>\n