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1 files changed, 19 insertions, 0 deletions

diff --git a/samples/either.js b/samples/either.js
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+++ b/samples/either.js
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+import * as either from "../src/either.js"
+import * as fs from "fs"
+
+function divide(a, b) {
+    if (b === 0)
+        return either.Left("Error: Division by zero!")
+    return either.Right(a / b)
+}
+
+// try piping 42 or 0 into stdin
+const input = +fs.readFileSync(0, "utf-8");
+const result = either.DO(function* () {
+    const a = yield divide(42, input)
+    const b = yield divide(42, a)
+    const c = yield divide(b, a)
+    return c
+})
+
+console.log(either.show(result));