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backend/node_modules/obliterator/map.js

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+/**
+ * Obliterator Map Function
+ * ===========================
+ *
+ * Function returning a iterator mapping the given iterator's values.
+ */
+var Iterator = require('./iterator.js');
+var iter = require('./iter.js');
+
+/**
+ * Map.
+ *
+ * @param  {Iterator} target - Target iterable.
+ * @param  {function} mapper - Map function.
+ * @return {Iterator}
+ */
+module.exports = function map(target, mapper) {
+  var iterator = iter(target);
+
+  return new Iterator(function next() {
+    var step = iterator.next();
+
+    if (step.done) return step;
+
+    return {
+      value: mapper(step.value)
+    };
+  });
+};