Combining arrays in a unique manner within a React app using JavaScript

Question

Combining arrays in a unique manner within a React app using JavaScript

I am encountering an issue while attempting to populate a table with rows and checkboxes using the .map method. The problem arises when I try to create an array by combining two arrays obtained from the database - JournalA and JournalB.

Journal_A

[
  {STUDENT_NAME: "data1",
   STUDENT_SECOND_NAME: "data",
   STUDENT_LAST_NAME: "data",
   STUDENT_PHOTO: "data"
  },
  {STUDENT_NAME: "data2",
   STUDENT_SECOND_NAME: "data",
   STUDENT_LAST_NAME: "data",
   STUDENT_PHOTO: "data"
  },
  {STUDENT_NAME: "data3",
   STUDENT_SECOND_NAME: "data",
   STUDENT_LAST_NAME: "data",
   STUDENT_PHOTO: "data"
  }
]

Journal_B

[{
  JOURNAL_DATA: "{
  "1": false,
  "2": false, 
  "3": false
  }"
}]

The desired output should be as follows

[
  {STUDENT_NAME: "data1",
   STUDENT_SECOND_NAME: "data",
   STUDENT_LAST_NAME: "data",
   STUDENT_PHOTO: "data",
   BOOL:true
  },
  {STUDENT_NAME: "data3",
   STUDENT_SECOND_NAME: "data",
   STUDENT_LAST_NAME: "data",
   STUDENT_PHOTO: "data",
   BOOL:false
  },
  {STUDENT_NAME: "data2",
   STUDENT_SECOND_NAME: "data",
   STUDENT_LAST_NAME: "data",
   STUDENT_PHOTO: "data",
   BOOL:true
  },
]

I have attempted to use concat() and push(), however, React does not seem to work well with them =(

let i = 0;
for (i=0; i<JournalA.length; i++){
    console.log(JournalA.map[i].concat(JournalB.concat[i]));
}

javascript arrays merge

Answer 1

Answer №1

Is this the solution?

const StudentJournal = [
  {STUDENT_NAME: "John",
   STUDENT_SECOND_NAME: "Doe",
   STUDENT_LAST_NAME: "Smith",
   STUDENT_PHOTO: "photo1"
  },
  {STUDENT_NAME: "Jane",
   STUDENT_SECOND_NAME: "Doe",
   STUDENT_LAST_NAME: "Johnson",
   STUDENT_PHOTO: "photo2"
  },
  {STUDENT_NAME: "Alice",
   STUDENT_SECOND_NAME: "Doe",
   STUDENT_LAST_NAME: "Williams",
   STUDENT_PHOTO: "photo3"
  }
]


const JournalData = [{
  JOURNAL_DATA: '{"1": false, "2": false, "3": false}'
}]

const jData = JSON.parse( JournalData[0].JOURNAL_DATA)

const updatedResult = StudentJournal.map( ( student, index ) => {
  student.BOOL = jData[ index + 1 ]
  return student
} )

console.log(updatedResult)

Answer 2

Is this the solution?

const StudentJournal = [
  {STUDENT_NAME: "John",
   STUDENT_SECOND_NAME: "Doe",
   STUDENT_LAST_NAME: "Smith",
   STUDENT_PHOTO: "photo1"
  },
  {STUDENT_NAME: "Jane",
   STUDENT_SECOND_NAME: "Doe",
   STUDENT_LAST_NAME: "Johnson",
   STUDENT_PHOTO: "photo2"
  },
  {STUDENT_NAME: "Alice",
   STUDENT_SECOND_NAME: "Doe",
   STUDENT_LAST_NAME: "Williams",
   STUDENT_PHOTO: "photo3"
  }
]


const JournalData = [{
  JOURNAL_DATA: '{"1": false, "2": false, "3": false}'
}]

const jData = JSON.parse( JournalData[0].JOURNAL_DATA)

const updatedResult = StudentJournal.map( ( student, index ) => {
  student.BOOL = jData[ index + 1 ]
  return student
} )

console.log(updatedResult)

Answer 3

Answer №2

Explore alternative methods instead of using a for loop

let merged_array = Journal_A.map((a, c) => ({
    ...a,
    BOOL: Journal_B[0][c + 1]
}))

UPDATE

Upon further examination, I realized that Journal_B is an object. Attempting to merge an array with three elements with another array containing only one element may not be the most efficient approach. It might be helpful to simplify the structure.

UPDATE 2

There seems to be a syntax error following the adjustment made to Journal_B

Answer 4

Explore alternative methods instead of using a for loop

let merged_array = Journal_A.map((a, c) => ({
    ...a,
    BOOL: Journal_B[0][c + 1]
}))

UPDATE

Upon further examination, I realized that Journal_B is an object. Attempting to merge an array with three elements with another array containing only one element may not be the most efficient approach. It might be helpful to simplify the structure.

UPDATE 2

There seems to be a syntax error following the adjustment made to Journal_B

Combining arrays in a unique manner within a React app using JavaScript

Answer №1

Answer №2

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