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{"@context":"https://schema.org","@type":"Code","url":"https://leetcodejavascript.com/solutions/valid-mountain-array","name":"#941 - Valid Mountain Array - LeetCode JavaScript Solutions","description":"Given an array of integers arr, return true if and only if it is a valid mountain array. Recall that arr is a mountain array if and only if:...","programmingLanguage":"JavaScript","codeRepository":"https://github.com/JoshCrozier/leetcode-javascript","codeSampleType":"JavaScript","text":"/**\n * @param {number[]} arr\n * @return {boolean}\n */\nvar validMountainArray = function(arr) {\n  if (arr.length < 3) return false;\n\n  const peakIndex = arr.indexOf(Math.max(...arr));\n  if (peakIndex === 0 || peakIndex === arr.length - 1) return false;\n\n  for (let i = 1; i < peakIndex; i++) {\n    if (arr[i] <= arr[i - 1]) return false;\n  }\n\n  for (let i = peakIndex + 1; i < arr.length; i++) {\n    if (arr[i] >= arr[i - 1]) return false;\n  }\n\n  return true;\n};","keywords":"LeetCode 941, #941 - Valid Mountain Array, Easy, JavaScript solution","learningResourceType":"Code","isAccessibleForFree":true,"educationalLevel":"intermediate","interactivityType":"mixed"}