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added 2 characters in body

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edited Feb 8, 2016 at 22:23

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var solution =

f=a=>
  a[0]?                   // if a is an array
    Math.max(...a.map(f)) // return the maximum depth of each element in the array
    +1                    // add 1 to increase the depth
  :0                      // if a is a number, return 0

// Test cases
result.textContent =
`[1]                                                              -> 1
[1, 2, 3]                                                         -> 1
[[1, 2, 3]]                                                       -> 2
[3, [3, [3], 3], 3]                                               -> 3
[[[[1], 2], [3, [4]]]]                                            -> 4
[1, [[3]], [5, 6], [[[[8]]]], 1]                                  -> 5
[1, [[2, 3, [[4], 5], 6, [7, 8]], 9, [10, [[[11]]]], 12, 13], 14] -> 6
[[[[[[[3]]]]]]]                                                   -> 7`
.split`\n`.map(t=>(c=t.split`->`.map(p=>p.trim()),c[0]+"=="+c[1]+"c[0]+" == "+c[1]+": "+(solution(eval(c[0]))==c[1]?"Passed":"Failed"))).join`\n`

<input type="text" id="input" value="[1, [[2, 3, [[4], 5], 6, [7, 8]], 9, [10, [[[11]]]], 12, 13], 14]" />
<button onclick="result.textContent=solution(eval(input.value))">Go</button>
<pre id="result"></pre>

var solution =

f=a=>
  a[0]?                   // if a is an array
    Math.max(...a.map(f)) // return the maximum depth of each element in the array
    +1                    // add 1 to increase the depth
  :0                      // if a is a number, return 0

// Test cases
result.textContent =
`[1]                                                              -> 1
[1, 2, 3]                                                         -> 1
[[1, 2, 3]]                                                       -> 2
[3, [3, [3], 3], 3]                                               -> 3
[[[[1], 2], [3, [4]]]]                                            -> 4
[1, [[3]], [5, 6], [[[[8]]]], 1]                                  -> 5
[1, [[2, 3, [[4], 5], 6, [7, 8]], 9, [10, [[[11]]]], 12, 13], 14] -> 6
[[[[[[[3]]]]]]]                                                   -> 7`
.split`\n`.map(t=>(c=t.split`->`.map(p=>p.trim()),c[0]+"=="+c[1]+": "+(solution(eval(c[0]))==c[1]?"Passed":"Failed"))).join`\n`

<input type="text" id="input" value="[1, [[2, 3, [[4], 5], 6, [7, 8]], 9, [10, [[[11]]]], 12, 13], 14]" />
<button onclick="result.textContent=solution(eval(input.value))">Go</button>
<pre id="result"></pre>

var solution =

f=a=>
  a[0]?                   // if a is an array
    Math.max(...a.map(f)) // return the maximum depth of each element in the array
    +1                    // add 1 to increase the depth
  :0                      // if a is a number, return 0

// Test cases
result.textContent =
`[1]                                                              -> 1
[1, 2, 3]                                                         -> 1
[[1, 2, 3]]                                                       -> 2
[3, [3, [3], 3], 3]                                               -> 3
[[[[1], 2], [3, [4]]]]                                            -> 4
[1, [[3]], [5, 6], [[[[8]]]], 1]                                  -> 5
[1, [[2, 3, [[4], 5], 6, [7, 8]], 9, [10, [[[11]]]], 12, 13], 14] -> 6
[[[[[[[3]]]]]]]                                                   -> 7`
.split`\n`.map(t=>(c=t.split`->`.map(p=>p.trim()),c[0]+" == "+c[1]+": "+(solution(eval(c[0]))==c[1]?"Passed":"Failed"))).join`\n`

<input type="text" id="input" value="[1, [[2, 3, [[4], 5], 6, [7, 8]], 9, [10, [[[11]]]], 12, 13], 14]" />
<button onclick="result.textContent=solution(eval(input.value))">Go</button>
<pre id="result"></pre>

Source Link

created Feb 8, 2016 at 22:18

user81655

11.2k
1
25
50

JavaScript (ES6), 35 bytes

f=a=>a[0]?Math.max(...a.map(f))+1:0

Explanation

Recursive function that returns the maximum depth of an array, or 0 if passed a number.

var solution =

f=a=>
  a[0]?                   // if a is an array
    Math.max(...a.map(f)) // return the maximum depth of each element in the array
    +1                    // add 1 to increase the depth
  :0                      // if a is a number, return 0

// Test cases
result.textContent =
`[1]                                                              -> 1
[1, 2, 3]                                                         -> 1
[[1, 2, 3]]                                                       -> 2
[3, [3, [3], 3], 3]                                               -> 3
[[[[1], 2], [3, [4]]]]                                            -> 4
[1, [[3]], [5, 6], [[[[8]]]], 1]                                  -> 5
[1, [[2, 3, [[4], 5], 6, [7, 8]], 9, [10, [[[11]]]], 12, 13], 14] -> 6
[[[[[[[3]]]]]]]                                                   -> 7`
.split`\n`.map(t=>(c=t.split`->`.map(p=>p.trim()),c[0]+"=="+c[1]+": "+(solution(eval(c[0]))==c[1]?"Passed":"Failed"))).join`\n`

<input type="text" id="input" value="[1, [[2, 3, [[4], 5], 6, [7, 8]], 9, [10, [[[11]]]], 12, 13], 14]" />
<button onclick="result.textContent=solution(eval(input.value))">Go</button>
<pre id="result"></pre>