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frontend/node_modules/antd/es/transfer/hooks/useData.js

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+import * as React from 'react';
+import { groupKeysMap } from '../../_util/transKeys';
+const useData = (dataSource, rowKey, targetKeys) => {
+  const mergedDataSource = React.useMemo(() => (dataSource || []).map(record => {
+    if (rowKey) {
+      return Object.assign(Object.assign({}, record), {
+        key: rowKey(record)
+      });
+    }
+    return record;
+  }), [dataSource, rowKey]);
+  const [leftDataSource, rightDataSource] = React.useMemo(() => {
+    var _a;
+    const leftData = [];
+    const rightData = Array.from({
+      length: (_a = targetKeys === null || targetKeys === void 0 ? void 0 : targetKeys.length) !== null && _a !== void 0 ? _a : 0
+    });
+    const targetKeysMap = groupKeysMap(targetKeys || []);
+    mergedDataSource.forEach(record => {
+      // rightData should be ordered by targetKeys
+      // leftData should be ordered by dataSource
+      if (targetKeysMap.has(record.key)) {
+        const idx = targetKeysMap.get(record.key);
+        rightData[idx] = record;
+      } else {
+        leftData.push(record);
+      }
+    });
+    return [leftData, rightData];
+  }, [mergedDataSource, targetKeys]);
+  return [mergedDataSource, leftDataSource.filter(Boolean), rightDataSource.filter(Boolean)];
+};
+export default useData;