csv-index

csv-index is used at run time in 6 crates. It is a direct run-time dependency in 4 crates.

Depender (with downloads and own rev deps)			csv-index version
850		xsv		^0.1.5
700		xan		^0.1.6
650	2	csvs_convert		^0.1.6
230		qsv		^0.1