Initial commit

build/dev/javascript/gleam_stdlib/gleam/function.mjs

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+/**
+ * Takes a single argument and always returns its input value.
+ */
+export function identity(x) {
+  return x;
+}
+
+/**
+ * Takes an argument and a single function, calls that function with that
+ * argument and returns that argument instead of the function return value.
+ *
+ * Useful for running synchronous side effects in a pipeline.
+ */
+export function tap(arg, effect) {
+  effect(arg);
+  return arg;
+}