Function mapSingleChildIntoContext

bundle.js:2149–2167

(bookKeeping, child, childKey)

    }

    function mapSingleChildIntoContext(bookKeeping, child, childKey) {
      var result = bookKeeping.result,
          keyPrefix = bookKeeping.keyPrefix,
          func = bookKeeping.func,
          context = bookKeeping.context;

      var mappedChild = func.call(context, child, bookKeeping.count++);
      if (Array.isArray(mappedChild)) {
        mapIntoWithKeyPrefixInternal(mappedChild, result, childKey, emptyFunction.thatReturnsArgument);
      } else if (mappedChild != null) {
        if (ReactElement_1.isValidElement(mappedChild)) {
          mappedChild = ReactElement_1.cloneAndReplaceKey(mappedChild,
          // Keep both the (mapped) and old keys if they differ, just as
          // traverseAllChildren used to do for objects as children
          keyPrefix + (mappedChild.key && (!child || child.key !== mappedChild.key) ? escapeUserProvidedKey(mappedChild.key) + '/' : '') + childKey);
        }
        result.push(mappedChild);
      }
    }

    function mapIntoWithKeyPrefixInternal(children, array, prefix, func, context) {
      var escapedPrefix = '';