count()
Count how many items in an array or an object pass a given tester function.
This function is valid in
v2.19.0 to v2.24.3.
This function has been downloaded 48 times.
Parameters
{Array|Object|string}
arrOrObj
If this is an array or an object all of the items that pass the tester function will be counted. If this is a string all of the characters that pass the tester function will be counted.
{Function}
tester
Function that will take in (1) each value, (2) the corresponding key, and (3) a reference to arrOrObj. If the function returns a true-ish value the count will be incremented.
{boolean=}
opt_traverseAll
Optional, Default:false
Indicates whether or not all items, including the non-owned ones, should be traversed and included in the count.
Returns
{number}
The number of times tester returned a true-ish value.
Required Functions
This function directly requires the following functions which are included automatically:
-
forOf()
Traverses all the characters in a string or all of the items in an array or an object, executing a function on each one.
-
nativeType()
Gets the native type name of a primitive or an object. Unlike YourJS.typeOf(), the types are solely determined by the system.