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SEDOLs: Difference between revisions
add Tcl
(awk) |
(add Tcl) |
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Line 625:
puts sedol + checksum(sedol)
end</lang>
=={{header|Tcl}}==
<lang tcl>namespace eval sedol {
variable chars {0 1 2 3 4 5 6 7 8 9 _ B C D _ F G H _ J K L M N _ P Q R S T _ V W X Y Z}
variable weight {1 3 1 7 3 9 1}
proc checksum {alnum6} {
variable chars
variable weight
set sum 0
set col 0
foreach char [split [string toupper [string range $alnum6 0 5]] ""] {
if {[set idx [lsearch -exact $chars $char]] == -1} {
error "invalid character: $char"
}
incr sum [expr {$idx * [lindex $weight $col]}]
incr col
}
return [expr {(10 - ($sum % 10)) % 10}]
}
proc valid {alnum7} {
expr {[checksum [string range $alnum7 0 5]] == [string index $alnum7 6]}
}
}
proc assert {condition {message "Assertion failed!"}} {
if { ! [uplevel 1 [list expr $condition]]} {
return -code error $message
}
}
set codes {710889 B0YBKJ 406566 B0YBLH 228276 B0YBKL 557910 B0YBKR 585284 B0YBKT}
set answers {7108899 B0YBKJ7 4065663 B0YBLH2 2282765 B0YBKL9 5579107 B0YBKR5 5852842 B0YBKT7}
foreach code $codes answer $answers {
set sedol "${code}[sedol::checksum $code]"
assert {$sedol eq $answer} "assertion failed: $sedol ne $answer"
puts $sedol
}</lang>
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