Question 174581 in Javascript Question posted in
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Javascript – How to remove specific values from JSON array

I want to remove all Id from dep_array that exists in the dep_log array and have deleted=0.

//array of departments ID
dep_array=['3', '2', '1'];


dep_log=[{"department_id": "3", "creation_date": "2023-05-13 17:59:27", "created_by": "1", "deleted":"0"} ,
{"department_id": "2", "creation_date": "2023-05-13 17:59:11", "created_by": "1", "deleted":"1"} ,
{"department_id": "1", "creation_date": "2023-05-13 09:46:25", "created_by": "1","deleted":"0"} ]

the reults should be stord in new array the filtered IDs

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3

Answers


  1. 0

    You can do it via Array.filter() and Array.some()

    let dep_array=['3', '2', '1','4','5']


let dep_log=[
{"department_id": "3", "creation_date": "2023-05-13 17:59:27", "created_by": "1", "deleted":"0"} ,
{"department_id": "2", "creation_date": "2023-05-13 17:59:11", "created_by": "1", "deleted":"1"} ,
{"department_id": "1", "creation_date": "2023-05-13 09:46:25", "created_by": "1","deleted":"0"}
]

dep_array = dep_array.filter(d1 => !dep_log.some(d2 => d2.department_id == d1 && d2.deleted == 0))
console.log(dep_array)
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  2. 0

    You can use JavaScript’s array method filter to get a sub-array conditionally.

    Documentation for filter

    //array of departments ID
const dep_array=['3', '2', '1'];


const dep_log=[{"department_id": "3", "creation_date": "2023-05-13 17:59:27", "created_by": "1", "deleted":"0"} ,
{"department_id": "2", "creation_date": "2023-05-13 17:59:11", "created_by": "1", "deleted":"1"} ,
{"department_id": "1", "creation_date": "2023-05-13 09:46:25", "created_by": "1","deleted":"0"} ];

const filteredArr = dep_log.filter(item => dep_array.includes(item.department_id) && Number(item.deleted))

console.log(filteredArr)
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  3. 0

    You may combine the filter function with find function to get your desired array.

    //array of departments ID
const dep_array = ['4', '3', '2', '1'];

const dep_log = [
  {"department_id": "3", "creation_date": "2023-05-13 17:59:27", "created_by": "1", "deleted":"0"},
  {"department_id": "2", "creation_date": "2023-05-13 17:59:11", "created_by": "1", "deleted":"1"},
  {"department_id": "1", "creation_date": "2023-05-13 09:46:25", "created_by": "1", "deleted":"0"}
];

const filtered_array = dep_array.filter(id => 
  dep_log.find(log => log.department_id === id)?.deleted != '0'
);


// "4" does not appear in the dep_log, keep
// "2" appears in the dep_log but with deleted=1, keep
console.log(filtered_array);
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