dschep

Python list & dict comprehensions translated to JavasScript

Comprehensions are a really useful feature of Python that aren't available in JavaScript (or many languages). These concepts of course can be tranlsated into using map instead. But especially the dictionaries are a bit trickier.

Lists / Arrays

>>> foobar = range(5)
>>> [x + 1 for x in foobar]
[1, 2, 3, 4, 5]

rijkerd

<Upload
                name="file"
                // eslint-disable-next-line no-undef
                customRequest={data => {
                  const { firebase } = this.props;

                  const ref = firebase
                    .storage()
                    .ref('music')
                    .child(`${new Date().getTime()}`);