TypeScript lodash.flow函数代码示例

function connectBranchCommits(branchColor: string, line: GraphLine): GraphLine {
  const branchPaths = flow<
    GraphLine,
    number[],
    number[][],
    number[],
    number[][],
    number[][]
  >(
    (cells) =>
      cells.reduce(
        (point, { value }, index) => {
          if (value === GraphSymbol.Commit) point.push(index);
          return point;
        },
        [] as number[],
      ),
    (points) =>
      points.map((point, index) => {
        // Duplicate inner points so we can build path chunks.
        // e.g [1, 2] => [[1, 2]] and [1, 2, 2, 3] => [[1, 2], [2, 3]]
        const isAtTheEdge = index === 0 || index === points.length - 1;
        return isAtTheEdge ? [point] : [point, point];
      }),
    flatten,
    chunk(2),
    (chunks) => chunks.filter((path) => path.length === 2),
  )(line);

  return line.map(
    (cell, index) =>
      branchPaths.some(isInBranchPath(index))
        ? { value: GraphSymbol.Branch, color: branchColor }
        : cell,
  );
}

export const getReindexWarnings = (flatSettings: FlatSettings): ReindexWarning[] => {
  const warnings = [
    // No warnings yet for 8.0 -> 9.0
  ] as Array<[ReindexWarning, boolean]>;

  return warnings.filter(([_, applies]) => applies).map(([warning, _]) => warning);
};

const removeUnsettableSettings = (settings: FlatSettings['settings']) =>
  omit(settings, [
    'index.uuid',
    'index.blocks.write',
    'index.creation_date',
    'index.legacy',
    'index.mapping.single_type',
    'index.provided_name',
    'index.routing.allocation.initial_recovery._id',
    'index.version.created',
    'index.version.upgraded',
  ]);

// Use `flow` to pipe the settings through each function.
const transformSettings = flow(removeUnsettableSettings);

const updateFixableMappings = (mappings: FlatSettings['mappings']) => {
  // TODO: change type to _doc
  return mappings;
};

const transformMappings = flow(updateFixableMappings);

 return createObservable<T>(observer => {
     const cts = new CancellationTokenSource();
     method(cts.token).then(_.flow(_.bind(observer.next, observer), _.bind(observer.complete, observer)), _.bind(observer.error, observer));
     return () => cts.cancel();
 }).publishReplay(1).refCount();

        descriptor: TypedPropertyDescriptor<SyncMethod>,
    ) => {
        const originalMethod = descriptor.value as SyncMethod;

        // Do not use arrow syntax here. Use a function expression in
        // order to use the correct value of `this` in this method
        // tslint:disable-next-line:only-arrow-functions
        descriptor.value = function(...args: any[]) {
            try {
                const result = originalMethod.apply(this, args);
                return result;
            } catch (error) {
                const transformedError = errorTransformer(error);
                throw transformedError;
            }
        };

        return descriptor;
    };

    return syncErrorHandlingDecorator;
};

// _.flow(f, g) = f ∘ g
const zeroExErrorTransformer = _.flow(schemaErrorTransformer, contractCallErrorTransformer);

export const decorators = {
    asyncZeroExErrorHandler: asyncErrorHandlerFactory(zeroExErrorTransformer),
    syncZeroExErrorHandler: syncErrorHandlerFactory(zeroExErrorTransformer),
};

// Translate rendered data into CLI logic.
//
// This is necessary because rendered data are optimized for browsers.
// Rendering is a bit different in CLI since we don't have pixels.
// Thus, we should translate data to have "line-per-line" instructions.
function computeGraphMap(gitgraph: GitgraphCore): GraphMap {
  const {
    branchesPaths,
    commits,
    commitMessagesX,
  } = gitgraph.getRenderedData();
  const branchesColors = Array.from(branchesPaths).map(
    ([branch]) => branch.computedColor!,
  );
  const branchSpacing = gitgraph.template.branch.spacing;
  const graphSize = xToIndex(commitMessagesX);
  const openedBranches = [commits[0].x];

  let graph: GraphMap = [];
  commits.forEach((commit, index) => {
    const graphLine = emptyLine();

    // Commit message should always be at the end of the graph.
    graphLine[graphLine.length - 1] = {
      value: {
        hash: commit.hashAbbrev,
        message: commit.subject,
        refs: commit.refs,
      },
      color: commit.style.color!,
    };

    graphLine[xToIndex(commit.x)] = {
      value: GraphSymbol.Commit,
      color: commit.style.color!,
    };

    const previousCommit = commits[index - 1];
    const isFirstCommitOfNewBranch = !includes(openedBranches, commit.x);
    if (isFirstCommitOfNewBranch) {
      graph = graph.concat(openBranchLines(previousCommit, commit));
      openedBranches.push(commit.x);
    }

    const isMergeCommit = commit.parents.length > 1;
    if (isMergeCommit) {
      graph = graph.concat(mergeBranchLines(previousCommit, commit));
    }

    graph.push(graphLine);
  });

  return flow<GraphMap, GraphMap, GraphMap, GraphMap>(
    // Transpose the graph so columns => lines (easier to map).
    unzip,
    (transposedGraph) =>
      transposedGraph.map((line, index) =>
        connectBranchCommits(branchColorFor(index), line),
      ),
    // Transpose again to return the proper graph.
    unzip,
  )(graph);

  function xToIndex(x: number): number {
    return (x / branchSpacing) * 2;
  }

  function emptyLine(): GraphLine {
    return fill(Array(graphSize), { value: GraphSymbol.Empty, color: "" });
  }

  function openBranchLines(origin: Commit, target: Commit): GraphLine[] {
    const start = xToIndex(origin.x) + 1;
    const end = xToIndex(target.x);

    return range(start, end).map((index) => {
      const line = emptyLine();
      line[index] = {
        value: GraphSymbol.BranchOpen,
        color: branchColorFor(end),
      };
      return line;
    });
  }

  function mergeBranchLines(origin: Commit, target: Commit): GraphLine[] {
    const start = xToIndex(origin.x) - 1;
    const end = xToIndex(target.x);

    return range(start, end, -1).map((index) => {
      const line = emptyLine();
      line[index] = {
        value: GraphSymbol.BranchMerge,
        color: branchColorFor(start),
      };
      return line;
    });
  }

  function branchColorFor(branchCommitsIndex: number): string {
//.........这里部分代码省略.........

  if (result === null) {
    throw new Error(`Could not parse action type "${type}"`);
  }

  return {
    category: result[1] as string,
    name: result[2] as string,
  };
}

export const getActionType = (enterface: ActionInterface) =>
  enterface.actionType;
export const getActionName = (enterface: ActionInterface) => enterface.name;
export const getActionCategory = _.flow(
  getActionType,
  parseActionType,
  v => v.category
);
export const getActionCategoryToken = _.flow(
  getActionCategory,
  _.camelCase,
  _.upperFirst
);
export const getActionEnumName = _.flow(
  getActionCategoryToken,
  v => `${v}ActionType`
);
export const getActionEnumPropName = _.flow(getActionName, _.snakeCase, v =>
  v.toUpperCase()
);
export const getActionUnionName = _.flow(

export function removePreAndSuf(value: string, prefix: string, suffix: string): string {
  return _.flow([_.curry(removeSuffix)(_, suffix), _.curry(removePrefix)(_, prefix)])(value);
}

 public get editor$() {
     if (!this._editor$) {
         this._editor$ = _.flow(subscribeAsync, ensureEditor, cacheEditor)(this._source.observeActiveTextEditor());
     }
     return this._editor$;
 }

  // Return false on empty Strings
  if (isString(x) && isEmpty(trim(x, " \n"))) return false

  // Intentional use of loose equality operator (Fogus)
  return x != null // eslint-disable-line eqeqeq
}

// Coerce a usable value or nothing at all
export const existyValue = x => {
  if (isExisty(x)) return x
}

export const capitalizeFirstCharacter = x =>
  x.charAt(0).toUpperCase() + x.slice(1)

export const classify = flow(camelCase, capitalizeFirstCharacter)

export const join = (by, xs) => compact(xs).join(by)

export const truncate = (string, length, append = "…") => {
  const x = string + ""
  const limit = ~~length
  return x.length > limit ? x.slice(0, limit) + append : x
}
export const toQueryString = (options = {}) =>
  stringify(options, {
    arrayFormat: "brackets",
    sort: (a, b) => a.localeCompare(b),
  })
export const toKey = (path, options = {}) => `${path}?${toQueryString(options)}`
export const exclude = (values?: any[], property?: any) => xs =>