ternary-tree | 易学教程

Easy way to understand nested ternary operators?

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问题 Is there a simple heuristic for understanding how to read nested ternary operators? I came across this in someone's source code and can't grok it. A simple ternary is easy: isRed = color == 'red' ? true : false But how do you read the following? Can I just line up the first with the last and the second with the second to last, or must I parse this into an if/else tree in my head? var offset = ( hasFrozenRows ) ? ( options.frozenBottom ) ? ( row >= actualFrozenRow ) ? ( h < viewportTopH ) ? (

Case Insensitive Ternary Search Tree

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问题 I had been using Ternary Search Tree for a while, as the data structure to implement a auto complete drop down combo box. Which means, when user type "fo", the drop down combo box will display foo food football The problem is, my current used of Ternary Search Tree is case sensitive. My implementation is as follow. It had been used by real world for around 1++ yeas. Hence, I consider it as quite reliable. My Ternary Search Tree code However, I am looking for a case insensitive Ternary Search

Iterate all coprime pairs using constant space?

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问题 I can generate all coprime pairs by following the ternary-tree algorithm listed on wikipedia: https://en.wikipedia.org/wiki/Coprime_integers Quickly: Start with two coprime branches: (2,1), (3,1), then iterate: Branch 1: (2m-n,m) Branch 2: (2m+n,m) Branch 3: (m+2n,n) However the space used will grow by a factor of three for each pair produced (and say printed, or otherwise not kept in memory). Here might be a solution in haskell: Generating sorted list of all possible coprimes But I was

Case Insensitive Ternary Search Tree

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I had been using Ternary Search Tree for a while, as the data structure to implement a auto complete drop down combo box. Which means, when user type "fo", the drop down combo box will display foo food football The problem is, my current used of Ternary Search Tree is case sensitive. My implementation is as follow. It had been used by real world for around 1++ yeas. Hence, I consider it as quite reliable. My Ternary Search Tree code However, I am looking for a case insensitive Ternary Search Tree, which means, when I type "fo", the drop down combo box will show me foO Food fooTBall Here are

Why use binary search if there's ternary search?

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I recently heard about ternary search in which we divide an array into 3 parts and compare. Here there will be two comparisons but it reduces the array to n/3. Why don't people use this much? Actually, people do use k-ary trees for arbitrary k. This is, however, a tradeoff. To find an element in a k-ary tree, you need around k*ln(N)/ln(k) operations (remember the change-of-base formula). The larger your k is, the more overall operations you need. The logical extension of what you are saying is "why don't people use an N-ary tree for N data elements?". Which, of course, would be an array.

Why use binary search if there's ternary search?

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问题 I recently heard about ternary search in which we divide an array into 3 parts and compare. Here there will be two comparisons but it reduces the array to n/3. Why don't people use this much? 回答1: Actually, people do use k-ary trees for arbitrary k. This is, however, a tradeoff. To find an element in a k-ary tree, you need around k*ln(N)/ln(k) operations (remember the change-of-base formula). The larger your k is, the more overall operations you need. The logical extension of what you are