Seqs of Clojure zippers - josf.info
Thus far, in the first two parts of what is turning into a series, when walking Clojure zippers, we’ve been mostly using a pattern like this: (require '(clojure [zip :as zip])) (defn recursion-for-recursion "Walking around doing nothing." [loc] (if (zip/end? loc) loc (recur (zip/next loc)))) Now, obviously, this function wouldn’t do anything except run the zipper out to its :end. But that has been
asmyczek/java-zipper · GitHub - Zipper data structure for Java
Let us start with a simple Node and Leaf class: // Node public class Node implements IZipNode { private String name; private final List<Node> children; public Node(final String name, final Node... children) { super(); assert(name != null); assert(children != null); this.name = name; this.children = Arrays.asList(children); } public String getName() { return name; } public Collection<Node> getChild
d.y.d.
00:18 05/11/26 経県値 æ¯ä¸Šã‹ã‚‰ã®æŒ‡æ‘˜ã§ç§‹ç”°çœŒãŒèµ¤ããªã‚Šã¾ã—ãŸã€‚ä¿®æ£ã€‚ 山形ã¨èŒ¨åŸŽã‚‚ã“ã‚Œã§ã‚ˆã‹ã£ãŸã‹å¾®å¦™ã«è‡ªä¿¡ãªã—。 （追記：茨城も赤ã„ã“ã¨ãŒåˆ¤æ˜Žã€‚） 木和 ç§ã® Tree Summing ã®ã‚³ãƒ¼ãƒ‰ãŒè¦‹ãŸã„人ã¯ã€ã“ã®ãƒšãƒ¼ã‚¸ã®ã‚½ãƒ¼ã‚¹å†…コメント èªã‚“ã§ä¸‹ã•ã„。「もã£ã¨èªã‚€ã€æ©Ÿèƒ½ã¨ã‹å®Ÿè£…ã™ã‚‹ã®é¢å€’ãªã®ã§æ‰‹æŠœãã°ã‚“ã–ã„。 ã‚ーã§ã‚‚ã€è‡ªåˆ†ã§è§£ã„ã¦ã¿ã¦ã€ã§ãã‚Œã°ï¼’æ—¥ãらã„æ‚©ã‚“ã§ã¿ãŸäººã˜ã‚ƒãªã„㨠èªã‚“ã§ã‚‚全然é¢ç™½ããªã„ã¨æ€ã„ã¾ã™ã‚ˆã‚“。 Ｃ言語ã®è¨€èªžä»•æ§˜ã®éš…ã‚’çªã„ã¦ã‚³ãƒ¼ãƒ‰ã‚’çŸãã™ã‚‹æŠ€èƒ½ã£ã¦ã®ã¯å®Œç’§ã«è¶£å‘³ã®é ˜åŸŸã« 属ã™ã‚‹ã¨æ€ã„ã¾ã™ãŒã€ãã‚Œã¨ã¯åˆ¥ã®ã€ŒçŸãç°¡æ½”ã«æ›¸ã‘るアルゴリズムを考ãˆã‚‹ã€èƒ½åŠ›ã® æ–¹ã¯ã€æ™®æ®µã‹ã‚‰ã‚ã‚Šã¨é‡è¦ãªã®ã§ã¯ãªã„ã‹ã¨ã„ã†æ°—ã‚‚ã—ã¾ã™ã€‚å˜ç´”ãªè©±ã€ã‚³ãƒ¼ãƒ‰ã®é‡ãŒ å°‘ãªã„ã»ã©ã€ãƒã‚°ã®å…ƒã‚‚å°‘ãªã„ã‚ã‘ã§ã€‚例ãˆã°ä»Šå›žã®å•é¡Œã‚’解ããŸã‚ã ã‘ã«ã€è‡ªåˆ† ã§Treeクラスを定義ã—ã¦ãれを生æˆã™ã‚‹pars
You could have invented zippers : ezyang’s blog
In the beginning, there was a binary tree: struct ctree { // c for children int val; struct ctree *left; struct ctree *right; } The flow of pointers ran naturally from the root of the tree to the leaves, and it was easy as blueberry pie to walk to the children of a node. Unfortunately, given a node, there was no good way to find out its parent! If you only needed efficient parent access, though, y
Haskell/Zippers - Wikibooks, open books for an open world
The latest reviewed version was checked on 30 December 2022. There is 1 pending change awaiting review. "Theseus, we have to do something" said Homer, chief marketing officer of Ancient Geeks Inc.. Theseus put the Minotaur action figureâ„¢ back onto the shelf and nodded. "Today's children are no longer interested in the ancient myths, they prefer modern heroes like Spiderman or Sponge Bob." Heroes.
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Zipper (data structure) - Wikipedia
A zipper is a technique of representing an aggregate data structure so that it is convenient for writing programs that traverse the structure arbitrarily and update its contents, especially in purely functional programming languages. The zipper was described by Gérard Huet in 1997.[1] It includes and generalizes the gap buffer technique sometimes used with arrays. The zipper technique is general i
Zipper - 関数的 (éžç ´å£Šçš„) ãªãƒ‡ãƒ¼ã‚¿æ§‹é€ ã®æ›´æ–° - (new Hatena).blog()
PLT Scheme ã®æ–°ã—ã„ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã‹ã‚‰ãƒªã‚¹ãƒˆãŒ immutable ã«ãªã‚‹ (set-car! ã¨ã‹ append! ã¨ã‹ãŒä½¿ãˆãªããªã‚‹) ã“ã¨ã¯éšåˆ†å‰ã«ã‚¢ãƒŠã‚¦ãƒ³ã‚¹ã•ã‚Œã¦ã„ã¦çŸ¥ã£ã¦ã¯ã„ãŸã‚“ã§ã™ãŒã€ä½•ã®å¯¾ç–ã‚‚ã—ãªã„ã¾ã¾ãƒªãƒªãƒ¼ã‚¹ã‚’è¿Žãˆã¦ã—ã¾ã„ã¾ã—㟠(ãƒãƒ¼ã‚¸ãƒ§ãƒ³ 4 ã®ã‚¢ãƒŠã‚¦ãƒ³ã‚¹ãƒ¡ãƒ³ãƒˆ)。 個人的ã«ã¯ã€é€£æƒ³ãƒªã‚¹ãƒˆã‚’よã使ã†ã®ã§ key, value ペア㮠value を変更ã™ã‚‹ã®ã« set-cdr! ã¯å¿…é ˆã ã£ãŸã‚“ã§ã™ã€‚ ã¨ã¯è¨€ãˆã€é–‹ç™ºé™£ã®é•·å¹´ã®çµŒé¨“ã‹ã‚‰ã€Œã‚³ãƒ³ã‚¹ã«å¯¾ã™ã‚‹ãƒŸãƒ¥ãƒ¼ãƒ†ãƒ¼ã‚·ãƒ§ãƒ³ã¯æ‚ªã€ã¨ã„ã†ãƒ†ãƒ¼ã‚¼ãŒå°Žã‹ã‚ŒãŸã‚ã‘ã§ã€ãƒ¦ãƒ¼ã‚¶ãƒ¼ã¨ã—ã¦ã¯å¤§äººã—ã従ã‚ãªã‘ã‚Œã°ãªã‚Šã¾ã›ã‚“。 ã‚‚ã¡ã‚ã‚“ã„ãã¤ã‹å¯¾å‡¦æ–¹æ³•ãŒã‚ã£ã¦ã®äº‹ã§ã™ã€‚例ãˆã° box ã¨ã„ã†ã‚³ãƒ³ãƒ†ãƒŠã‚’ value ã®ä½ç½®ã«ç½®ãã€ãã®ä¸ã«ãƒ‡ãƒ¼ã‚¿ã‚’ç½®ã„ã¦å†è¨å®š (set-box!) ã™ã‚‹ã€ã¨ã„ã†æ–¹æ³•ãŒæœ‰åŠ›ãªä»£æ›¿æ¡ˆã§ã™ã€‚ ãŸã ã€box ã¯ä½•ã¨ãªãé¢å€’
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Efficient data transfer through zero copy
GitHub - ferd/zippers: A library for functional zipper data structures in Erlang. Read more on zippers @ http://ferd.ca/yet-another-article-on-zippers.html
Yet Another Article on Zippers, in Erlang
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