proc "index-of" [val list -input] [val item] {
    $list | each [val elem] [val index] {
        if [$elem | eq $item] { $index }
    } | to-list | get 0 [int "-1"]
}

proc "get-value" [val table] [val columnName] [val rowNumber] { // this proc returns value from columnName column rowNumber row
    let [val columnIndex [$table | get columns | to-list | index-of $columnName]] {
        $table | get rows | to-list 
               | get $rowNumber | get values |to-list 
               | get $columnIndex
    }
}

 let [val table [read-csv-file "file:/temp/read-csv.csv"]] { // read table from csv-file
    get-value $table "a1" 0 | log // this line writes to Error log value from column a1 row 0
}