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vault backup: 2023-11-10 17:46:05

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Alice 2023-11-10 17:46:05 +00:00
parent 670f0830c7
commit c5cd7663f7
2 changed files with 70 additions and 7 deletions
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14
.obsidian/workspace.json vendored
View file

@ -13,7 +13,7 @@
"state": {
"type": "markdown",
"state": {
"file": "4a1s/MFES/PL - Aula 1.md",
"file": "4a1s/MFES/PL - Aula 7.md",
"mode": "source",
"source": false
}
@ -97,7 +97,7 @@
"state": {
"type": "backlink",
"state": {
"file": "4a1s/MFES/PL - Aula 1.md",
"file": "4a1s/MFES/PL - Aula 7.md",
"collapseAll": false,
"extraContext": false,
"sortOrder": "alphabetical",
@ -114,7 +114,7 @@
"state": {
"type": "outgoing-link",
"state": {
"file": "4a1s/MFES/PL - Aula 1.md",
"file": "4a1s/MFES/PL - Aula 7.md",
"linksCollapsed": false,
"unlinkedCollapsed": true
}
@ -137,7 +137,7 @@
"state": {
"type": "outline",
"state": {
"file": "4a1s/MFES/PL - Aula 1.md"
"file": "4a1s/MFES/PL - Aula 7.md"
}
}
},
@ -170,8 +170,10 @@
"digitalgarden:Digital Garden Publication Center": false
}
},
"active": "3ca14d4a6c304083",
"active": "9853b375f7893cb9",
"lastOpenFiles": [
"4a1s/index.md",
"4a1s/MFES/PL - Aula 1.md",
"4a1s/MFES/PL - Aula 7.md",
"4a1s/MFES/PL - Aula 6.md",
"4a1s/DAA/PL - Project.md",
@ -197,8 +199,6 @@
"Excalidraw/Drawing 2023-10-25 12.16.38.excalidraw.md",
"4a1s/MFES/PL - Aula 3.md",
"4a1s/MFES/PL - Aula 4.md",
"4a1s/MFES/PL - Aula 1.md",
"4a1s/RAS/Notas Projeto RAS.md",
"Images/Pasted image 20231018121319.png",
"Images/Pasted image 20231018120412.png",
"Images/Pasted image 20231018120219.png",

63
4a1s/MFES/PL - Aula 7.md
View file

@ -69,3 +69,66 @@ pred insert[n : Node] {
```
//Solved
```c
// Recall the hash table Alloy model,
// now with mutable lists inside the buckets.
sig Bucket {
var head : lone Node
}
sig Node {
key : one Key,
var prox : lone Node
}
sig Key {
hash : one Hash
}
sig Hash {}
// Specify the operation of inserting a node
// in the hash table. The node should be
// inserted at the head of a bucket.
// If the operation only works well when the
// hash of the new node does not exist in the
// table you get Two points. If it always
// works well you get Five points. Use the
// respective commands to check how many
// points you have.
pred nodeToHead[n : Node]{
//node not in hash
n.key.hash not in Bucket.head.key.hash
some b : Bucket | {
b.head= none and b.head' = n //put node in the head
all x : Bucket - b | x.head' = x.head //everything remains the same
all y : Node | y.prox' = y.prox //all nodes remain the same
}
}
pred nodeToTail[n: Node]{
//node not in linked lists of buckets
n not in Bucket.head.*prox
//node in hash
n.key.hash in Bucket.head.key.hash
some b : Bucket | {
b.head.key.hash = n.key.hash and { //same hash
(b.head' = n and n.prox' = b.head) //new head
all x : Bucket - b | x.head' = x.head //all other buckets remain the same
all y : Node - n | y.prox' = y.prox //all other nodes remain the same
}
}
}
pred insert[n : Node] {
nodeToHead[n] or nodeToTail [n]
}
```
http://alloy4fun.inesctec.pt/mnvLbxeXWRuhsnQSd