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Lodash _.toInteger


The lodash _.toInteger is a method that converts a given value to an integer using mathematical rounding. This conversion follows JavaScript's type coercion rules, which means that it works with a wide range of data types including strings, numbers, and even objects.

When passed a string value, _.toInteger parses it and returns an integer value. If the string cannot be parsed to a numeric value, it will return NaN. For example:

_.toInteger('123') // Returns 123
_.toInteger('abc') // Returns NaN

When passed a floating-point number, _.toInteger will round it to the nearest integer. For example:

_.toInteger(5.5) // Returns 5
_.toInteger(5.6) // Returns 6

When passed an object, _.toInteger uses the valueOf method to get a primitive value to convert. If the object does not have a valueOf method, it will not be converted and will return NaN. For example:

_.toInteger({ valueOf: function() { return 5; } }) // Returns 5
_.toInteger({}) // Returns NaN

In summary, the _.toInteger method is a convenient way to convert a wide range of values to integers using mathematical rounding, including strings, numbers, and objects with a valueOf method.