hasValue

Check if sorted array has a value using binary search.

function hasValue(x, v, fc, fm)
// x:  a sorted array
// v:  search value
// fc: compare function (a, b)
// fm: map function (v, i, x)

const xsortedArray = require('extra-sorted-array');

var x = [10, 20, 20, 40, 40, 80];
xsortedArray.hasValue(x, 30);
// → false

xsortedArray.hasValue(x, 40);
// → true

References

• Array.includes() : MDN Web Docs
• array-tools.contains : @75lb