Validate International Securities Identification Number: Difference between revisions
Validate International Securities Identification Number (view source)
Revision as of 02:33, 8 May 2022
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AU0000VXGZA3 is valid
FR0000988040 is valid</pre>
=={{header|Vlang}}==
{{trans|go}}
<lang vlang>import regex
const (
inc = [
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9],
[0, 2, 4, 6, 8, 1, 3, 5, 7, 9],
]
)
fn valid_isin(n string) bool {
mut r,_,_ := regex.regex_base('^[A-Z]{2}[A-Z0-9]{9}\d$')
if !r.matches_string(n) {
return false
}
mut sum := 0
mut p := 0
for i := 10; i >= 0; i-- {
p = 1 - p
mut d := n[i..i+1].int()
if d < 'A'.int() {
sum += inc[p][d-'0'.int()]
} else {
d -= 'A'.int()
sum += inc[p][d%10]
p = 1 - p
sum += inc[p][d/10+1]
}
}
sum += n[11..12].int() - '0'.int()
return sum%10 == 0
}
struct Testcases {
isin string
valid bool
}
fn main(){
testcases := [
Testcases{"US0378331005", true},
Testcases{"US0373831005", false},
Testcases{"U50378331005", false},
Testcases{"US03378331005", false},
Testcases{"AU0000XVGZA3", true},
Testcases{"AU0000VXGZA3", true},
Testcases{"FR0000988040", true},
]
for testcase in testcases {
actual := valid_isin(testcase.isin)
if actual != testcase.valid {
println("expected ${testcase.valid} for ${testcase.isin}, got $actual")
}
}
}</lang>
{{out}}
<pre>expected true for US0378331005, got false
expected true for AU0000XVGZA3, got false
expected true for AU0000VXGZA3, got false
expected true for FR0000988040, got false
</pre>
=={{header|Wren}}==
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