Fully renamed and updated everything, tagged, built

snippets/validateNumber.md

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+### validateNumber
+
+Returns `true` if the given value is a number, `false` otherwise.
+
+Use `!isNaN` in combination with `parseFloat()` to check if the argument is a number.
+Use `isFinite()` to check if the number is finite.
+Use `Number()` to check if the coercion holds.
+
+```js
+const validateNumber = n => !isNaN(parseFloat(n)) && isFinite(n) && Number(n) == n;
+// validateNumber('10') -> true
+```