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[Sync Iteration] typescript/line-up/1 #29

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[Sync Iteration] typescript/line-up/1 #29

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19 changes: 19 additions & 0 deletions solutions/typescript/line-up/1/line-up.ts
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Original file line number Diff line number Diff line change
@@ -0,0 +1,19 @@
export function format(name: unknown, number: unknown): unknown {
let stringVersion: string = ``;
let postfix: string = ``;
if (typeof number === `number`) {
stringVersion = number.toString();
postfix = stringVersion[stringVersion.length - 1];
}
if (postfix === `1` && stringVersion !== `11`) {
postfix = `${stringVersion}st`;
} else if (postfix === `2` && stringVersion !== `12` && stringVersion !== `112`) {
postfix = `${stringVersion}nd`;
} else if (postfix === `3` && stringVersion !== `13`) {
postfix = `${stringVersion}rd`;
} else {
postfix = `${stringVersion}th`;
}

return `${name}, you are the ${postfix} customer we serve today. Thank you!`;
}