CODEWITHSUNDEEP
javascriptlodash
Jasin Yip
Jasin Yip

Reputation: 308

How to do something for each function in Lodash flow?

Is there any way to do something after each functions provided to Lodash function _.flow?

I want to log each consuming time of the functions provided to _.flow.

For example, for the following code,

_.flow([
  funcA,
  funcB
])

I would like to log funcA and funcB's consuming times like:

funcA spent 1.21s.
funcB spent 0.45s.

Upvotes: 0

Views: 125

Answers (1)

Jasin Yip
Jasin Yip

Reputation: 308

Thanks Paul Rooney, I implemented it:

function injectTimeLogger (logger, funcs) {
  return funcs.map((func, i) => (...params) => {
    const funcName = func.name;
    const startTime = Date.now();
    const rst = func(...params);
    const spentTime = (Date.now() - startTime) / 1000;
    logger.info(`func[${i + 1}/${funcs.length}][${funcName}] spent ${spentTime}s`);
    return rst;
  });
}

const logger = {
  info: console.log
}

_.flow(injectTimeLogger(logger, [
  funcA,
  funcB
]))

Upvotes: 2

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