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import { getChangesOnList } from './getChangesOnList'; | |
describe('getChangesOnList', () => { | |
type TestItem = { id: number; value: string }; | |
const testItemA: TestItem = { id: 1, value: 'A' }; | |
const testItemB: TestItem = { id: 2, value: 'B' }; | |
const testItemC: TestItem = { id: 3, value: 'C' }; | |
const testItems: TestItem[] = [testItemA, testItemB, testItemC]; |
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import { getChangesOnList } from './getChangesOnList'; | |
describe('getChangesOnList', () => { | |
it('should return the correct changes', () => { | |
const prev = [ | |
{ id: 1, name: 'foo' }, | |
{ id: 2, name: 'bar' }, | |
]; | |
const curr = [ | |
{ id: 1, name: 'foo' }, |
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import { getChangesOnList } from './getChangesOnList'; | |
describe('getChangesOnList', () => { | |
const prevList = [ | |
{ id: 1, name: 'John' }, | |
{ id: 2, name: 'Mary' }, | |
{ id: 3, name: 'Bob' }, | |
]; | |
const currList = [ | |
{ id: 1, name: 'John' }, |
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import isEqualFn from 'lodash/fp/isEqual'; | |
type Item = { id: string | number }; | |
/** | |
* Computes the changes between two lists of items. | |
* @param prev The previous list of items. | |
* @param curr The current list of items. | |
* @param isEqual The comparison function to use to determine if two items are deep equal. | |
* @returns An object containing three properties: |
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import axios from "axios"; | |
import {history} from "../helpers/history"; | |
import { | |
makeAuthorizationHeader, | |
isTokenValid, | |
getToken, | |
setToken, | |
tokenIsExpired, | |
} from "../helpers/token"; |
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const article = { | |
"id": "a2f693f1-e63c-4190-81b3-7a0b459a2517", | |
"author": { | |
"id": "6e9418c3-8658-466f-81d6-58ac5548d3dd", | |
"displayName": "Gene Price", | |
"avatar": "https://s3.amazonaws.com/uifaces/faces/twitter/iamsteffen/128.jpg", | |
"color": "#486071", | |
"url": "author/Gene-Price_6e9418c3-8658-466f-81d6-58ac5548d3dd" | |
}, | |
"title": "at odit nulla", |
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Component.propTypes = { | |
requiredArray: PropTypes.array.isRequired, | |
requiredBool: PropTypes.bool.isRequired, | |
requiredFunc: PropTypes.func.isRequired, | |
requiredNumber: PropTypes.number.isRequired, | |
requiredObject: PropTypes.object.isRequired, | |
requiredString: PropTypes.string.isRequired, | |
requiredSymbol: PropTypes.symbol.isRequired, | |
// ... | |
}; |
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Component.propTypes = { | |
optionalArray: PropTypes.array, | |
optionalBool: PropTypes.bool, | |
optionalFunc: PropTypes.func, | |
optionalNumber: PropTypes.number, | |
optionalObject: PropTypes.object, | |
optionalString: PropTypes.string, | |
optionalSymbol: PropTypes.symbol, | |
// ... | |
}; |
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const fullName = ( | |
{firstName = "", lastName = ""} // we are providing default values | |
: {firstName: string, lastName: string} // type, can be inferenced | |
= {} // default value object for object argument | |
) => `${firstName} ${lastName}`; |
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function add(a: number, b: number): number { return a + b }; | |
const add = (a: number, b: number): number => a + b; | |
type Arithmetics = (a: number, b: number) => number; | |
// or | |
/* | |
interface Arithmetics { | |
(a: number, b: number): number; | |
} |
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