Lots of custom types for robustness and predictability
There is so much boiler plate when handling data: Validating, converting, looping on attributes, plucking, dealing with undefined, and so on... This library provides predictable type factories. The capability of setting and getting data is removed from the user and instead data is always preprocessed on setting. Standard methods such as toString, valueOf, toPrecision, toExponential... are defined when needed so that console calls and implicit conversions work as expected (for the most part).
Types generated from this factory are scalar/1D in nature. They handle numbers and strings for the most part. The handler parameters allows to set conditions on teh contained data.
import {makeValueType} from 'type-factories';
const Integer = makeValueType(Number, {
set (target, key, value) {
if (key === 'value') {
target.value = value === undefined ? 0 : Math.trunc(Number(value));
} else {
target[key] = value;
}
return true;
}
});
Integer(2.4) === 2; // true
const i = new Integer('36.9');
i + i * 2.5 === 126; // not 129.15Types generated from this factory are a mixte bag of Value types. They are objects with strongly typed public properties.
import {makeDataType} from 'type-factories';
const Person = makeDataType({
name: String,
age: Number,
female: Boolean
});
const person = new Person({
name: 'John Doe',
age: '55'
});
person.name === 'John Doe'; // true
person.age === 55; // true
person.female === false; // true
person.value = {
name: 'John H. Doe',
age: 56
};
person.name === 'John H. Doe'; // true
person.age === 56; // true
person.age = {
name: 'Patrick Gray',
age: '10',
};
person.name === 'John H. Doe'; // not 'Patrick Gray'
person.age === 10; // true### makeListType(Type, handler)
Types from this factory are vectorial/multiD in nature. They handle list of same Value type instances. The handler helps override some default behaviors
import {makeListType} from 'type-factories';
const Players = makeListType({
number: Number,
name: String
});
const players = new Players({
number: 1,
name: 'Kasparov'
},
{
number: 2,
name: 'Karpov'
});
players.push({
number: '3',
name: 'Fischer'
});
players.length === 3;
players[2].number === 3; // not '3'type-factories is MIT licensed.
© 2017 Jason Lenoble