Created
July 16, 2019 14:56
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Determine whether it follows the sequence given in the patterns array
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// Given an array strings, determine whether it follows the sequence given in the patterns array. In other words, there should be no i and j for which strings[i] = strings[j] and patterns[i] ≠ patterns[j] or for which strings[i] ≠ strings[j] and patterns[i] = patterns[j]. | |
function areFollowingPatterns(strings, patterns) { | |
let sHash = {} | |
let pHash = {} | |
let counter = 0 | |
let pat1 = '' | |
let pat2 = '' | |
for(let i=0; i<strings.length; i++){ | |
if(sHash[strings[i]]===pHash[patterns[i]]){ | |
counter++ | |
if(!sHash[strings[i]]){ | |
sHash[strings[i]] = counter | |
} | |
if(!pHash[patterns[i]]){ | |
pHash[patterns[i]] = counter | |
} | |
pat1 += sHash[strings[i]] | |
pat2 += pHash[patterns[i]] | |
}else{ | |
return false | |
} | |
if(pat1 !== pat2){return false} | |
} | |
return true | |
} |
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