Gets the size of an array, object or string.
Get type of val
(array
, object
or string
).
Use length
property for arrays.
Use length
or size
value if available or number of keys for objects.
Use size
of a Blob
object created from val
for strings.
Split strings into array of characters with split('')
and return its length.
代码片段
const size = val =>
Array.isArray(val)
? val.length
: val && typeof val === 'object'
? val.size || val.length || Object.keys(val).length
: typeof val === 'string'
? new Blob([val]).size
: 0;
使用样例
size([1, 2, 3, 4, 5]); // 5
size('size'); // 4
size({ one: 1, two: 2, three: 3 }); // 3