Daniel Li

Software Engineer. Author of 📖 BEJA ( and IDP on AWS (

[Daniel Li @d4nyll]

There are no integers in #JavaScript.

[Daniel Li @d4nyll]

At the Developer Productivity Engineering Summit! Loving the vibe already 😃 #dpesummit

[Daniel Li @d4nyll]

Sometimes, it may be better to give tasks to less experienced team members, who has not yet reached the peak of their proficiency and is still motivated to learn, rather than someone who has started their journey down the slope of boredom.

#softwareengineering #management

[Daniel Li @d4nyll]

If you're a team lead or engineering manager, don't always assign tasks to the most experienced/qualified person.

#softwareengineering #softwaremanagement #management #techlead

[Daniel Li @d4nyll]

For these hard-to-automate tasks, putting the most experienced/qualified person on the task may not always yield the most efficient results. The role of the manager, then, is to find the right balance between learning and performing for each team member.

[Daniel Li @d4nyll]

Note, however, that `test.concurrent` is experimental, and does not support `beforeEach`/`beforeAll`/`afterEach`/`afterAll` (https://t.co/pmHQOrxnwq).

[Daniel Li @d4nyll]

@fbjest runs tests in parallel right? Well...yes and no.

#javascript #TypeScript #qualityassurance #Softwaretesting #webdevelopment

[Daniel Li @d4nyll]

Test cases within each file runs in sequence. You can use `test.concurrent` (https://t.co/0WheBkt905) to run tests concurrently within the same file. You can also use the `maxConcurrency` (https://t.co/g71KwPJK2C) config to limit the number of concurrent tests at any one time.

[Daniel Li @d4nyll]

There's also a helpful `Number.isSafeInteger(number)` (https://t.co/1UQzA1uZev) method that will check whether a number is in that range.

In summary, you *can* safely store integer *values* as long as they are between `Number.MIN_SAFE_INTEGER` and `Number.MAX_SAFE_INTEGER`.

[Daniel Li @d4nyll]

There are no integers in #JavaScript.

[Daniel Li @d4nyll]

...that's why the ECMAScript standard have given names to these numbers as the constants `Number.MIN_SAFE_INTEGER` (https://t.co/RbLPDnWsHD) and `Number.MAX_SAFE_INTEGER` (https://t.co/qqO29lHAMA), respectively.