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May 17, 2018 03:13
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渡されたクレジットカードのブランドを返す
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function GetCardBrand(cardNo) { | |
var map = new Map(); | |
map.set("visa", "^4[0-9]{12}(?:[0-9]{3})?$"); | |
map.set("master", "^5[1-5][0-9]{14}$"); | |
map.set("amex", "^3[47][0-9]{13}$"); | |
map.set("diners", "^3(?:0[0-5]|[68][0-9])[0-9]{11}$"); | |
map.set("jcb", "^(?:2131|1800|35\d{3})\d{11}$"); | |
for (var [key, value] of map) { | |
var result = cardNo.match(value); | |
if (result !== null) { | |
return key; | |
} | |
} | |
return "unknown"; | |
} |
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