Created
September 30, 2023 10:38
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Print nested array contents in the style of a file tree
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let arr = [ | |
// arr[0] | |
[ | |
// arr[0][0] | |
[ | |
// arr[0][0][0] | |
"unshift", | |
// arr[0][0][1] | |
[ | |
// arr[0][0][1][0] | |
[ | |
// arr[0][0][1][0][0] | |
false | |
], | |
// arr[0][0][1][1] | |
[ | |
// arr[0][0][1][1][0] | |
1, | |
// arr[0][0][1][1][1] | |
2, | |
// arr[0][0][1][1][2] | |
3 | |
] | |
], | |
// arr[0][0][2] | |
[ | |
// arr[0][0][2][0] | |
"complex", | |
// arr[0][0][2][1] | |
"nested" | |
], | |
], | |
// arr[0][1] | |
[ | |
// arr[0][1][0] | |
"loop", | |
// arr[0][1][1] | |
"shift", | |
// arr[0][1][2] | |
[ | |
// arr[0][1][2][0] | |
6, | |
// arr[0][1][2][1] | |
7, | |
// arr[0][1][2][2] | |
1000, | |
], | |
// arr[0][1][3] | |
"method", | |
], | |
], | |
// arr[1] | |
[ | |
// arr[1][0] | |
"concat", | |
// arr[1][1] | |
[ | |
// arr[1][1][0] | |
false, | |
// arr[1][1][1] | |
true, | |
], | |
// arr[1][2] | |
"spread", | |
// arr[1][3] | |
"array", | |
], | |
// arr[2] | |
[ | |
// arr[2][0] | |
"mutate", | |
// arr[2][1] | |
1327.98, | |
// arr[2][2] | |
"splice", | |
// arr[2][3] | |
"slice", | |
// arr[2][4] | |
"push", | |
], | |
// arr[3] | |
[ | |
// arr[3][0] | |
"iterate", | |
// arr[3][1] | |
[ | |
// arr[3][1][0] | |
1.3849, | |
// arr[3][1][1] | |
7, | |
], | |
// arr[3][2] | |
"8.4876", | |
// arr[3][3] | |
"arbitrary", | |
// arr[3][4] | |
"depth", | |
], | |
]; | |
function printNestedStructure(struct, path = [], prefix = '') { | |
if (Array.isArray(struct)) { | |
for (let i = 0; i < struct.length; i++) { | |
const currentPath = [...path, i]; | |
const linePrefix = (i === struct.length - 1) ? '└──' : '├──'; | |
const continuationPrefix = (i === struct.length - 1) ? ' ' : '│ '; | |
if (typeof struct[i] === 'object') { | |
console.log(prefix + linePrefix + `${currentPath.map(idx => `[${idx}]`).join('')}`); | |
printNestedStructure(struct[i], currentPath, prefix + continuationPrefix); | |
} else { | |
console.log(prefix + linePrefix + `${currentPath.map(idx => `[${idx}]`).join('')} → ${struct[i]}`); | |
} | |
} | |
} else if (typeof struct === 'object') { | |
const keys = Object.keys(struct); | |
for (let i = 0; i < keys.length; i++) { | |
const currentPath = [...path, keys[i]]; | |
const linePrefix = (i === keys.length - 1) ? '└──' : '├──'; | |
const continuationPrefix = (i === keys.length - 1) ? ' ' : '│ '; | |
if (typeof struct[keys[i]] === 'object') { | |
console.log(prefix + linePrefix + `${keys[i]}`); | |
printNestedStructure(struct[keys[i]], currentPath, prefix + continuationPrefix); | |
} else { | |
console.log(prefix + linePrefix + `${keys[i]} → ${struct[keys[i]]}`); | |
} | |
} | |
} | |
} | |
console.log("."); | |
printNestedStructure(arr); | |
/* OUTPUT | |
. | |
├──[0] | |
│ ├──[0][0] | |
│ │ ├──[0][0][0] → unshift | |
│ │ ├──[0][0][1] | |
│ │ │ ├──[0][0][1][0] | |
│ │ │ │ └──[0][0][1][0][0] → false | |
│ │ │ └──[0][0][1][1] | |
│ │ │ ├──[0][0][1][1][0] → 1 | |
│ │ │ ├──[0][0][1][1][1] → 2 | |
│ │ │ └──[0][0][1][1][2] → 3 | |
│ │ └──[0][0][2] | |
│ │ ├──[0][0][2][0] → complex | |
│ │ └──[0][0][2][1] → nested | |
│ └──[0][1] | |
│ ├──[0][1][0] → loop | |
│ ├──[0][1][1] → shift | |
│ ├──[0][1][2] | |
│ │ ├──[0][1][2][0] → 6 | |
│ │ ├──[0][1][2][1] → 7 | |
│ │ └──[0][1][2][2] → 1000 | |
│ └──[0][1][3] → method | |
├──[1] | |
│ ├──[1][0] → concat | |
│ ├──[1][1] | |
│ │ ├──[1][1][0] → false | |
│ │ └──[1][1][1] → true | |
│ ├──[1][2] → spread | |
│ └──[1][3] → array | |
├──[2] | |
│ ├──[2][0] → mutate | |
│ ├──[2][1] → 1327.98 | |
│ ├──[2][2] → splice | |
│ ├──[2][3] → slice | |
│ └──[2][4] → push | |
└──[3] | |
├──[3][0] → iterate | |
├──[3][1] | |
│ ├──[3][1][0] → 1.3849 | |
│ └──[3][1][1] → 7 | |
├──[3][2] → 8.4876 | |
├──[3][3] → arbitrary | |
└──[3][4] → depth | |
*/ |
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