I got following data structure, which is an array of accounts objects, where some accounts are being parents to its children accounts, which in turn can be parents to other accounts etc.:
[{
"id": "acc.1260446672222.11",
"type": "EXPENSES_FOLDER",
"name": "Expense Group",
"balance": 3418.11,
"children": [{
"id": "acc.1260446672238.27",
"type": "EXPENSE",
"name": "Advertising, Promotion and Entertainment Account",
"balance": 0,
"children": []
}, {
"id": "acc.9a2492ba-0d82-4f4a-a1b4-14868f1e1a39",
"type": "EXPENSES_FOLDER",
"name": "Premises Costs",
"balance": 0,
"children": [{
"id": "acc.287ba5b6-5536-428b-950f-d71d2af73ccc",
"type": "EXPENSE",
"name": "Use of Home - Gas",
"balance": 0,
"children": [
]
}, {
"id": "acc.7091ee15-3f02-4bd1-94e5-5918cf986969",
"type": "EXPENSE",
"name": "Hire of Venue, Studios, Teaching Rooms",
"balance": 0,
"children": [
]
}]
}, {
"id": "acc.827ec446-edeb-4f2b-8032-d306292d2d83",
"type": "EXPENSES_FOLDER",
"name": "Administrative Expenses",
"balance": 558.61,
"children": [{
"id": "acc.0ed5fc81-7734-4452-86a9-db22a6b0f8e8",
"type": "EXPENSE",
"name": "Bank Charges",
"balance": 15,
"children": [
]
}, {
"id": "acc.e2cdb2c0-8565-4991-a35a-d4596b0ddf45",
"type": "EXPENSE",
"name": "Software & Computer Peripherals",
"balance": 417.13,
"children": [
]
}, {
"id": "acc.96d5d00e-43f4-4d3a-b97b-fdf258c65514",
"type": "EXPENSE",
"name": "Printing, photocopying etc",
"balance": 55.93,
"children": [
]
}, {
"id": "acc.494dd64a-4fb3-42b8-be3e-8f3b59a2ef59",
"type": "EXPENSE",
"name": "Artists Administration Service",
"balance": 0,
"children": [
]
}, {
"id": "acc.1260446672238.35",
"type": "EXPENSE",
"name": "Stationery",
"balance": 0,
"children": [
]
}, {
"id": "acc.96d89d0d-5465-488b-b37f-d41ca114c5e6",
"type": "EXPENSE",
"name": "Mobile Telephone",
"balance": 41.19,
"children": [
]
}, {
"id": "acc.1260446672238.33",
"type": "EXPENSE",
"name": "Home Telephone",
"balance": 0,
"children": [
]
}, {
"id": "acc.1260446672238.38",
"type": "EXPENSE",
"name": "Postage/delivery",
"balance": 29.36,
"children": [
]
}]
}, {
"id": "acc.b9c9bbc7-43df-472e-9ac8-c7c76f08f49a",
"type": "EXPENSES_FOLDER",
"name": "Instruments, Equipment Maintenance etc",
"balance": 1002.48,
"children": [{
"id": "acc.1260446672238.32",
"type": "OTHER_EXPENSES",
"name": "Instrument Insurance",
"balance": 157.48,
"children": [
]
}, {
"id": "acc.2a1cca15-2868-4770-a3e7-d43a6268c6a1",
"type": "EXPENSE",
"name": "Instrument Repairs & Maintenance",
"balance": 845,
"children": [
]
}, {
"id": "acc.a908aee0-84fb-450a-916b-4cec25265aef",
"type": "EXPENSE",
"name": "Accessories & Replacement Parts",
"balance": 0,
"children": [
]
}]
}, {
"id": "acc.a42cdd86-0d9e-4f3f-af0d-7c4525374731",
"type": "EXPENSES_FOLDER",
"name": "Motor Vehicle",
"balance": 0,
"children": [{
"id": "acc.cb325e7e-0ce4-4c78-9cb4-20659df733a6",
"type": "EXPENSE",
"name": "Fuel and Oil",
"balance": 0,
"children": [
]
}]
}, {
"id": "acc.4bdd9e26-ce64-4e7f-b46a-82ec9de06ded",
"type": "EXPENSES_FOLDER",
"name": "Other Travel",
"balance": 132.1,
"children": [{
"id": "acc.77dd2142-f2de-4a2c-9247-061d0661bc0a",
"type": "EXPENSE",
"name": "Taxis",
"balance": 24.5,
"children": [
]
}, {
"id": "acc.2b54abdd-7ef5-43cd-bdb9-c8c981b59ff2",
"type": "EXPENSE",
"name": "Public Transport",
"balance": 107.6,
"children": [
]
}]
}, {
"id": "acc.e4695b70-31fa-4e23-afd0-97335dcd5b9e",
"type": "EXPENSE",
"name": "Subsitence",
"balance": 0,
"children": [
]
}, {
"id": "acc.02d222bf-4dff-4308-afe9-69b93f412ada",
"type": "EXPENSE",
"name": "Hotel and Accomodation",
"balance": 0,
"children": [
]
}, {
"id": "acc.d61cd5b4-2c80-4ab8-93d0-9d5726bd253b",
"type": "EXPENSES_FOLDER",
"name": "Fees and Commission Paid",
"balance": 0,
"children": [{
"id": "acc.1262189019758.7",
"type": "EXPENSE",
"name": "Pupils exam entry fees",
"balance": 0,
"children": [
]
}, {
"id": "acc.a7d7efd3-d0da-4704-babb-079b6077f3fe",
"type": "EXPENSE",
"name": "Audition, competition entry fees",
"balance": 0,
"children": [
]
}, {
"id": "acc.3b91ee4e-40a8-46d8-aa05-3afa5974b3ef",
"type": "EXPENSE",
"name": "Deputies, Other Musicians",
"balance": 0,
"children": [
]
}]
}, {
"id": "acc.250d6872-6023-4599-a0b6-b7159eebbfa1",
"type": "EXPENSES_FOLDER",
"name": "Other Professional Expenses",
"balance": 1739.42,
"children": [{
"id": "acc.b7315228-f85a-4ffb-9199-d1128a409e5f",
"type": "EXPENSE",
"name": "Promotion & Publicity",
"balance": 138.6,
"children": [
]
}, {
"id": "acc.69ca2005-d7a0-448b-b70c-dafb128a48ae",
"type": "EXPENSE",
"name": "Other Expenses",
"balance": 364.5,
"children": [
]
}, {
"id": "acc.dcd999d2-4e18-41be-b9cc-218d4034b88e",
"type": "EXPENSE",
"name": "Office Equipment, Furniture",
"balance": 0,
"children": [
]
}, {
"id": "acc.e0460706-d5c9-4c40-9d1e-0d2058864b92",
"type": "EXPENSE",
"name": "CDs, Dowloads etc",
"balance": 67.57,
"children": [
]
}, {
"id": "acc.1866df79-9e44-459a-a978-727904987469",
"type": "EXPENSE",
"name": "Professional Books, Magazines",
"balance": 104.01,
"children": [
]
}, {
"id": "acc.24c1651d-e7ae-48bc-a32d-311427e0fcea",
"type": "EXPENSE",
"name": "Professional Associations",
"balance": 272.17,
"children": [
]
}, {
"id": "acc.289ab0ac-b9d3-435e-ac82-9da9702b7d4b",
"type": "EXPENSE",
"name": "Tuition",
"balance": 470,
"children": [
]
}, {
"id": "acc.f24cf99b-6291-4b9f-821e-425f4909d4e1",
"type": "EXPENSE",
"name": "Scores, Manuscript Paper etc",
"balance": 215.32,
"children": [
]
}, {
"id": "acc.1af95953-56f0-455e-9d0a-7c4e0477cf0d",
"type": "EXPENSE",
"name": "Performance Clothing",
"balance": 0,
"children": [
]
}, {
"id": "acc.c0585577-535a-4ae2-a02b-e5b249f67c67",
"type": "EXPENSE",
"name": "Concerts, Shows etc",
"balance": 107.25,
"children": [
]
}]
}, {
"id": "acc.1260446672222.24",
"type": "ADMIN",
"name": "Administrative Expenses",
"balance": 0,
"children": [
]
}, {
"id": "acc.1260446672238.26",
"type": "TRAVEL",
"name": "Travel and Subsistence Account",
"balance": -14.5,
"children": [
]
}, {
"id": "acc.1260446672238.28",
"type": "LEGAL",
"name": "Legal and Professional Costs Account",
"balance": 0,
"children": [
]
}, {
"id": "acc.1260446672238.36",
"type": "OTHER_EXPENSES",
"name": "Rent/Rates",
"balance": 0,
"children": [
]
}, {
"id": "acc.1262191376548.37",
"type": "EXPENSE",
"name": "Research",
"balance": 0,
"children": [
]
}, {
"id": "acc.1262191388329.38",
"type": "EXPENSE",
"name": "Professional Development",
"balance": 0,
"children": [
]
}, {
"id": "acc.1262192291558.52",
"type": "EXPENSE",
"name": "Professional Presentation",
"balance": 0,
"children": [
]
}, {
"id": "acc.1262193596634.72",
"type": "EXPENSE",
"name": "Subscriptions",
"balance": 0,
"children": [
]
}, {
"id": "acc.1262265941130.16",
"type": "EXPENSE",
"name": "Piano accompaniment",
"balance": 0,
"children": [
]
}, {
"id": "acc.1267370824329.1",
"type": "EXPENSE",
"name": "Cost of Sales",
"balance": 0,
"children": [
]
}]
}]
What I need is to flatten this array to have a flat list of accounts. What's the way to proceed with that in Vanilla JavaScript. (I also got access to lodash methods in my project).
Just iterate over and if a children is found get the array from the children concatinated.
function flat(array) {
var result = [];
array.forEach(function (a) {
result.push(a);
if (Array.isArray(a.children)) {
result = result.concat(flat(a.children));
}
});
return result;
}
var data = [{ id: "acc.1260446672222.11", type: "EXPENSES_FOLDER", name: "Expense Group", balance: 3418.11, children: [{ id: "acc.1260446672238.27", type: "EXPENSE", name: "Advertising, Promotion and Entertainment Account", balance: 0, children: [] }, { id: "acc.9a2492ba-0d82-4f4a-a1b4-14868f1e1a39", type: "EXPENSES_FOLDER", name: "Premises Costs", balance: 0, children: [{ id: "acc.287ba5b6-5536-428b-950f-d71d2af73ccc", type: "EXPENSE", name: "Use of Home - Gas", balance: 0, children: [] }, { id: "acc.7091ee15-3f02-4bd1-94e5-5918cf986969", type: "EXPENSE", name: "Hire of Venue, Studios, Teaching Rooms", balance: 0, children: [] }] }, { id: "acc.827ec446-edeb-4f2b-8032-d306292d2d83", type: "EXPENSES_FOLDER", name: "Administrative Expenses", balance: 558.61, children: [{ id: "acc.0ed5fc81-7734-4452-86a9-db22a6b0f8e8", type: "EXPENSE", name: "Bank Charges", balance: 15, children: [] }, { id: "acc.e2cdb2c0-8565-4991-a35a-d4596b0ddf45", type: "EXPENSE", name: "Software & Computer Peripherals", balance: 417.13, children: [] }, { id: "acc.96d5d00e-43f4-4d3a-b97b-fdf258c65514", type: "EXPENSE", name: "Printing, photocopying etc", balance: 55.93, children: [] }, { id: "acc.494dd64a-4fb3-42b8-be3e-8f3b59a2ef59", type: "EXPENSE", name: "Artists Administration Service", balance: 0, children: [] }, { id: "acc.1260446672238.35", type: "EXPENSE", name: "Stationery", balance: 0, children: [] }, { id: "acc.96d89d0d-5465-488b-b37f-d41ca114c5e6", type: "EXPENSE", name: "Mobile Telephone", balance: 41.19, children: [] }, { id: "acc.1260446672238.33", type: "EXPENSE", name: "Home Telephone", balance: 0, children: [] }, { id: "acc.1260446672238.38", type: "EXPENSE", name: "Postage/delivery", balance: 29.36, children: [] }] }, { id: "acc.b9c9bbc7-43df-472e-9ac8-c7c76f08f49a", type: "EXPENSES_FOLDER", name: "Instruments, Equipment Maintenance etc", balance: 1002.48, children: [{ id: "acc.1260446672238.32", type: "OTHER_EXPENSES", name: "Instrument Insurance", balance: 157.48, children: [] }, { id: "acc.2a1cca15-2868-4770-a3e7-d43a6268c6a1", type: "EXPENSE", name: "Instrument Repairs & Maintenance", balance: 845, children: [] }, { id: "acc.a908aee0-84fb-450a-916b-4cec25265aef", type: "EXPENSE", name: "Accessories & Replacement Parts", balance: 0, children: [] }] }, { id: "acc.a42cdd86-0d9e-4f3f-af0d-7c4525374731", type: "EXPENSES_FOLDER", name: "Motor Vehicle", balance: 0, children: [{ id: "acc.cb325e7e-0ce4-4c78-9cb4-20659df733a6", type: "EXPENSE", name: "Fuel and Oil", balance: 0, children: [] }] }, { id: "acc.4bdd9e26-ce64-4e7f-b46a-82ec9de06ded", type: "EXPENSES_FOLDER", name: "Other Travel", balance: 132.1, children: [{ id: "acc.77dd2142-f2de-4a2c-9247-061d0661bc0a", type: "EXPENSE", name: "Taxis", balance: 24.5, children: [] }, { id: "acc.2b54abdd-7ef5-43cd-bdb9-c8c981b59ff2", type: "EXPENSE", name: "Public Transport", balance: 107.6, children: [] }] }, { id: "acc.e4695b70-31fa-4e23-afd0-97335dcd5b9e", type: "EXPENSE", name: "Subsitence", balance: 0, children: [] }, { id: "acc.02d222bf-4dff-4308-afe9-69b93f412ada", type: "EXPENSE", name: "Hotel and Accomodation", balance: 0, children: [] }, { id: "acc.d61cd5b4-2c80-4ab8-93d0-9d5726bd253b", type: "EXPENSES_FOLDER", name: "Fees and Commission Paid", balance: 0, children: [{ id: "acc.1262189019758.7", type: "EXPENSE", name: "Pupils exam entry fees", balance: 0, children: [] }, { id: "acc.a7d7efd3-d0da-4704-babb-079b6077f3fe", type: "EXPENSE", name: "Audition, competition entry fees", balance: 0, children: [] }, { id: "acc.3b91ee4e-40a8-46d8-aa05-3afa5974b3ef", type: "EXPENSE", name: "Deputies, Other Musicians", balance: 0, children: [] }] }, { id: "acc.250d6872-6023-4599-a0b6-b7159eebbfa1", type: "EXPENSES_FOLDER", name: "Other Professional Expenses", balance: 1739.42, children: [{ id: "acc.b7315228-f85a-4ffb-9199-d1128a409e5f", type: "EXPENSE", name: "Promotion & Publicity", balance: 138.6, children: [] }, { id: "acc.69ca2005-d7a0-448b-b70c-dafb128a48ae", type: "EXPENSE", name: "Other Expenses", balance: 364.5, children: [] }, { id: "acc.dcd999d2-4e18-41be-b9cc-218d4034b88e", type: "EXPENSE", name: "Office Equipment, Furniture", balance: 0, children: [] }, { id: "acc.e0460706-d5c9-4c40-9d1e-0d2058864b92", type: "EXPENSE", name: "CDs, Dowloads etc", balance: 67.57, children: [] }, { id: "acc.1866df79-9e44-459a-a978-727904987469", type: "EXPENSE", name: "Professional Books, Magazines", balance: 104.01, children: [] }, { id: "acc.24c1651d-e7ae-48bc-a32d-311427e0fcea", type: "EXPENSE", name: "Professional Associations", balance: 272.17, children: [] }, { id: "acc.289ab0ac-b9d3-435e-ac82-9da9702b7d4b", type: "EXPENSE", name: "Tuition", balance: 470, children: [] }, { id: "acc.f24cf99b-6291-4b9f-821e-425f4909d4e1", type: "EXPENSE", name: "Scores, Manuscript Paper etc", balance: 215.32, children: [] }, { id: "acc.1af95953-56f0-455e-9d0a-7c4e0477cf0d", type: "EXPENSE", name: "Performance Clothing", balance: 0, children: [] }, { id: "acc.c0585577-535a-4ae2-a02b-e5b249f67c67", type: "EXPENSE", name: "Concerts, Shows etc", balance: 107.25, children: [] }] }, { id: "acc.1260446672222.24", type: "ADMIN", name: "Administrative Expenses", balance: 0, children: [] }, { id: "acc.1260446672238.26", type: "TRAVEL", name: "Travel and Subsistence Account", balance: -14.5, children: [] }, { id: "acc.1260446672238.28", type: "LEGAL", name: "Legal and Professional Costs Account", balance: 0, children: [] }, { id: "acc.1260446672238.36", type: "OTHER_EXPENSES", name: "Rent/Rates", balance: 0, children: [] }, { id: "acc.1262191376548.37", type: "EXPENSE", name: "Research", balance: 0, children: [] }, { id: "acc.1262191388329.38", type: "EXPENSE", name: "Professional Development", balance: 0, children: [] }, { id: "acc.1262192291558.52", type: "EXPENSE", name: "Professional Presentation", balance: 0, children: [] }, { id: "acc.1262193596634.72", type: "EXPENSE", name: "Subscriptions", balance: 0, children: [] }, { id: "acc.1262265941130.16", type: "EXPENSE", name: "Piano accompaniment", balance: 0, children: [] }, { id: "acc.1267370824329.1", type: "EXPENSE", name: "Cost of Sales", balance: 0, children: [] }] }],
result = flat(data);
document.write('<pre>' + JSON.stringify(result, 0, 4) + '</pre>');