Manupilate strings of all types to get desired output

• Usage
  • splitText
  • countOccurance
  • mergeObjects
  • injectDupObj
  • transformList

Usage

import the js-fns library

const { splitText, countOccurance } = require('simple-fns');

// or

const jsFns = require('simple-fns');

splitText

Split a string into an array as well as the count for the length using a specified delimiter

• options

  1. With option 0 (optional)

  const result = splitText('test test test', ' ');
  
  // result -> { total: 3, list: ['test', 'test', 'test']}
  
  // or
  const result = splitText('test test test', ' ', 0);
  
  // result -> {total: 3,list: ['test', 'test', 'test']}

  2. With option 1

  const result = splitText('test test test', ' ', 1);
  
  // result -> { total: 3}
  
  // or
  const result = splitText('test , test , test', ',', 1);
  
  // result -> { total: 3}

  3. With option 2

  const result = splitText('test test test', ' ', 2);
  
  // result -> {list: ['test', 'test', 'test']}
  
  // or
  const result = splitText('test , test , test', ',', 2);
  
  //result -> {list: ['test', 'test', 'test']}
  // Note: if the delimeter is other than ' ' (space), then all whitespaces will be trimmed from the string before the array is returned.

countOccurance

Count the number of times a character occurs in a string

• options

  1. With option 0 (optional) -> count Uppercases

  const result1 = countOccurance('Home-work-Space-');
  // result1 -> 2
  
  const result2 = countOccurance('homeworkspace');
  // result2 -> 0
  
  const result3 = countOccurance('homeworkSpace', 0);
  // result3 -> 1
  
  const result4 = countOccurance('homeworkSpace', 0, '');
  // result4 -> 1
  
  const result5 = countOccurance('homeworkSpace', 0, ' ');
  // result5 -> 1
  
  const result6 = countOccurance('homeworkSpace', 0, ',');
  // result6 -> 1

  2. With option 1 -> count Lowercases

  const result1 = countOccurance('Home-work-Space-', 1);
  // result1 -> 11
  
  const result2 = countOccurance('Home work Space', 1);
  // result2 -> 11
  
  const result3 = countOccurance('Home work Space ', 1);
  // result3 -> 11
  
  const result4 = countOccurance('Home, work , Space ', 1);
  // result4 -> 11
  
  const result5 = countOccurance('homeworkspace', 1, ',');
  // result5 -> 13

  3. With option 2 -> digits/ numbers

  const result1 = countOccurance('1ome-2ork-3pace-', 2);
  // result1 -> 3
  
  const result2 = countOccurance('1234', 2);
  // result2 -> 4
  
  const result3 = countOccurance('-1', 2);
  // result3 -> 1
  
  const result4 = countOccurance('1,2,3,4,5', 2);
  // result4 -> 5
  
  const result5 = countOccurance('4  6  . 7', 2);
  // result5 -> 3

  4. With option 3 -> whitespaces in a string

  const result1 = countOccurance('1ome-2ork-3pace-', 3, ' ');
  // result1 -> 0
  
  const result2 = countOccurance('1 2 3 4', 3);
  // result2 -> 3
  
  const result3 = countOccurance(' 1 2 3 4 ', 3);
  // result3 -> 5
  
  const result4 = countOccurance(' 0 ', 3);
  // result4 -> 2
  
  const result5 = countOccurance('Home Work  Space ', 3, ' ');
  // result5 -> 4

  5. With option 4 -> delimiter in a string

  const result1 = countOccurance('1ome-2ork-3pace-', 4, '-');
  // result1 -> 3
  
  const result2 = countOccurance('1ome-2ork-3pace-', 4, '- ');
  // result2 -> 3
  
  const result3 = countOccurance('1ome-2ork-3pace-', 4, ' - ');
  // result3 -> 3
  
  const result4 = countOccurance('1ome/2ork/3pace/', 4, '/');
  // result4 -> 3
  
  const result5 = countOccurance('boy , girl , kid , child', 4, ',');
  // result5 -> 3
  
  const result5 = countOccurance('boy , girl , kid , child', 4, '/');
  // result5 -> 0

  mergeObjects

  Combine two objects in different arrays using their shared identifier

"with 'd' specified, you indicate that you want 'my_id' as a key to be deleted from the returned array objects";

const result1 = mergeObjects(
  [{ id: 1, name: 'Isaac', age: 20 }],
  [{ my_id: 1, address: 'Kampala' }],
  'id',
  'my_id',
  'd'
);

// output -> [{id: 1, name: 'Isaac', age: 20, address: 'Kampala'}]

const result2 = mergeObjects(
  [{ id: 1, name: 'Isaac', age: 20 }],
  [{ my_id: 1, address: 'Kampala' }],
  'id',
  'my_id'
);

// output -> [{id: 1, name: 'Isaac', age: 20, my_id: 1, address: 'Kampala'}]

const result3 = mergeObjects(
  [{ id: 1, name: 'Isaac', age: 20 }],
  [{ id: 1, address: 'Kampala' }],
  'id',
  'id'
);
// output -> [{id: 1, name: 'Isaac', age: 20, address: 'Kampala'}]

const result4 = mergeObjects(
  [{ id: 1, name: 'Isaac', age: 20 }],
  [{ id: 1, address: 'Kampala' }],
  'id',
  'id',
  'd'
);
// output -> [{'Isaac', age: 20, address: 'Kampala'}]

injectDupObj

Inject objects from one array with duplicate id into the main array

const result1 = injectDupObj(
  [
    { id: 1, name: 'john1', age: 30 },
    { id: 2, name: 'john2', age: 30 },
    { id: 3, name: 'john3', age: 30 },
    { id: 4, name: 'john4', age: 30 },
    { id: 5, name: 'john5', age: 30 },
  ],
  [
    { id: 1, user_id: 1, course: 'SST' },
    { id: 2, user_id: 2, course: 'English' },
    { id: 3, user_id: 1, course: 'Science' },
    { id: 8, user_id: 1, course: 'Christianity' },
    { id: 4, user_id: 2, course: 'Luganda' },
    { id: 5, user_id: 3, course: 'Runyankole' },
    { id: 6, user_id: 4, course: 'Swahili' },
    { id: 7, user_id: 7, course: 'Luo' },
  ],
  'id',
  'user_id',
  'courses'
);
// lookupKey is optional, if not give, the inner array will have 'lookup' as its key
// output
[
  {
    id: 1,
    name: 'john1',
    age: 30,
    courses: [
      { id: 1, user_id: 1, course: 'SST' },
      { id: 3, user_id: 1, course: 'Science' },
      { id: 8, user_id: 1, course: 'Christianity' },
    ],
  },
  {
    id: 2,
    name: 'john2',
    age: 30,
    courses: [
      { id: 2, user_id: 2, course: 'English' },
      { id: 4, user_id: 2, course: 'Luganda' },
    ],
  },
  {
    id: 3,
    name: 'john3',
    age: 30,
    courses: [{ id: 5, user_id: 3, course: 'Runyankole' }],
  },
  {
    id: 4,
    name: 'john4',
    age: 30,
    courses: [{ id: 6, user_id: 4, course: 'Swahili' }],
  },
  { id: 5, name: 'john5', age: 30 },
];

Note

• Added type definitions on version 0.1.0, if you experience any issue, runnpm i [email protected] to install a previous version without types
• As well raise an issue here