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frontend/node_modules/underscore/modules/pairs.js

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+import keys from './keys.js';
+
+// Convert an object into a list of `[key, value]` pairs.
+// The opposite of `_.object` with one argument.
+export default function pairs(obj) {
+  var _keys = keys(obj);
+  var length = _keys.length;
+  var pairs = Array(length);
+  for (var i = 0; i < length; i++) {
+    pairs[i] = [_keys[i], obj[_keys[i]]];
+  }
+  return pairs;
+}