rmk

Remake JS - Object transformation without mutations.

Docs: Actions | Shortcuts | Utils

Example 1. Clear data.

Transform Object:

import rmk from 'rmk';

let data = {one: "", two: null, three: undefined, four: {}, five: []}
const formula = rmk(rmk.clear());
const result = formula(data)
// =>  {}

Transform array:

import rmk from 'rmk';

let data = [{one: "", two: null, a: 1}, {three: undefined, four: {}, five: [], b:2}]
const formula = rmk(rmk.clear());
const result = formula(data)
// =>  [ {a:1}, {b:2} ]

Shortcut:

import clear from 'rmk/shortcuts/clear';

let data = {one: "", two: null, three: undefined, four: {}, five: []}
const result = clear(data)
// =>  { birthDate: new Date(1975, 4,3), year: 1975 }

Example 2. To snake case.

Transform Object:

import rmk from 'rmk';
import toSnakeCase from 'rmk/actions/toSnakeCase';

let data = {fooBar: 1, foo: 2, BAR: 3}
const formula = rmk(toSnakeCase());
const result = formula(data)
// =>  { foo_bar: 1, foo: 2, bar: 3 }

Transform array:

import rmk from 'rmk';
import toSnakeCase from 'rmk/actions/toSnakeCase';

let data = [{fooBar: 1}, {barBaz: 2}]
const formula = rmk(toSnakeCase());
const result = formula(data)
// =>  [ {foo_bar: 1}, {bar_baz: 2} ]

Shortcut:

import toSnakeCase from 'rmk/shortcuts/toSnakeCase';

let data = {fooBar: 1, foo: 2, BAR: 3}
const result = toSnakeCase(data)
// =>  { foo_bar: 1, foo: 2, bar: 3 }

Example 3. To camel case.

Transform Object:

import rmk from 'rmk';

let data = {foo_bar: 1, foo: 2, BAR: 3}
const formula = rmk(rmk.toCamelCase());
const result = formula(data)
// =>  { fooBar: 1, foo: 2, bar: 3 }

Transform array:

import rmk from 'rmk';

let data = [{foo_Bar: 1}, {bar_baz: 2}]
const formula = rmk(rmk.toCamelCase());
const result = formula(data)
// =>  [ {fooBar: 1}, {barBaz: 2} ]

Shortcut:

import toCamelCase from 'rmk/shortcuts/toCamelCase';

let data = {foo_bar: 1, foo: 2, BAR: 3}
const result = toCamelCase(data)
// =>  { fooBar: 1, foo: 2, bar: 3 }

Example 4. Add static field.

Transform Object:

import rmk from 'rmk';

let data = {foo: 1, bar: 2}
const formula = rmk(rmk.update({
    baz:3
}));
const result = formula(data)
// =>  { foo: 1, bar: 2, baz:3 }

Transform array:

import rmk from 'rmk';

let data = [{foo: 1}, {foo: 4}]
const formula = rmk(rmk.update({
    baz: (localState) => foo + 1
}));
const result = formula(data)
// =>  [ {foo: 1, baz:2},  {foo: 4, baz:5} ]

Shortcut:

import update from 'rmk/shortcuts/update';

let data = {foo: 1, bar: 2}
const result = update(data, {
  baz:3
});
// =>  {foo: 1, bar: 2, baz:3}

Example 5. Complex transform array:

import rmk from 'rmk';

let data = [
    {birth_date: new Date(1975, 4,3), user: 1},
    {birth_date: new Date(1975, 4,3), user: undefined}
]
const formula = rmk(
  rmk.toCamelCase(),
  rmk.update({
    year: localState => localState.birthDate.getFullYear()
  }),
  rmk.clear()
);
const result = formula(data);
// =>  [ {birthDate: new Date(1975, 4,3), year: 1975, user: 1},  {birthDate: new Date(1982, 4,3), year: 1982} ]

Example 5. Complex transform array. Import all actions:

import rmk from 'rmk';

let data = [
    {birth_date: new Date(1975, 4,3), user: 1},
    {birth_date: new Date(1975, 4,3), user: undefined}
]
const formula = rmk(
  rmk.toCamelCase(),
  rmk.update({
    year: localState => localState.birthDate.getFullYear()
  }),
  rmk.clear()
);
const result = formula(data);
// =>  [ {birthDate: new Date(1975, 4,3), year: 1975, user: 1}, {birthDate: new Date(1982, 4,3), year: 1982} ]

Example 6. Complex transform array. Import all shortcuts:

import rmk from 'rmk';
import shortcuts from 'rmk/shortcuts';

let data = [
    {birth_date: new Date(1975, 4,3), user: 1},
    {birth_date: new Date(1975, 4,3), user: undefined}
]
const step1 = shortcuts.toCamelCase(data);
const step2 = shortcuts.update(step1, {
 year: localState => localState.birthDate.getFullYear()
});
const result = rmkShortcuts.clear(step2);
// =>  [ {birthDate: new Date(1975, 4,3), year: 1975, user: 1},  {birthDate: new Date(1982, 4,3), year: 1982} ]