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QUESTION
I have a Map field which can contain complex types. The value (Object) can contain Map, String or ArrayList my goal is to write a method that can recursively loop over the Map and create a nested DOM elements and write into List. I was able to complete it halfway through it and after that, I am unable to understand how to proceed in the recursive approach.
Basically, I want my Marshalling method to handle any complex/nested values such as Map and String and create a DOM Element recursively and store it in List.
My input Map can be anything like (can be more nested/complex or simple):
ANSWER
Answered 2021-Jun-13 at 17:06I tried a lot of things and did some research, I was able to get it, posting the answer here as it can be useful to someone in the future:
QUESTION
it is my first attempt to create a linkedList. the code is not proper for sure but all i want to do is just to be a able to create a list and initialize it with one node for the start. the below code is syntactically correct but it is not working. can point the mistake.
...ANSWER
Answered 2021-Jun-12 at 05:45You must allocate a structure and assign its pointer to s before having the function init dereference it.
Also you should use standard int main(void) in hosted environment instead of void main(), which is illegal in C89 and implementation-defined in C99 or later, unless you have some special reason to use non-standard signature.
Another note is that casting results of malloc() family is considered as a bad practice.
QUESTION
I am writing a similar task manager app, i have some issues when working with BLoC:
- First, I create a Page to show all the task that have been added by pressing the FloatingActionButton() below.
- Next, when the user finished the form by hitting the FlatButton on the top right which is called SAVE, it will be submitted to Firestore, by the _submit() method in the JobForm class.
- NOTE: I also added some validator to validate the NameForm and the RatePerHourForm so it will show an error when they are null and they worked very well.
- I used a StreamBuilder() to update my JobPage() ( the first screen ), everywhen the data from Firestore changed.
- That was a summary of what I am trying to do.
BUT, when the user press the SAVE button, the Name Field and the ratePerHour Field is always empty even when i called onChanged: , in every TextField() to update them.
HERE IS MY flutter doctor:
...ANSWER
Answered 2021-Jun-12 at 07:19The issue is with the updateWith method of the JobFormBloc.
Currently you have this below:
QUESTION
I tried to implement Dijkstra algorithm with adjacency list,the code is exhibiting strange behaviour when i remove the cout statement from updatePriority() function it throws segmentation core dumped error and if the cout statement is included it doesn't throw any error, everything working fine.
what might be the cause for it ?
i have included my code below thank you..
...ANSWER
Answered 2021-Jun-06 at 14:05There is an error in enqueue in this line:
QUESTION
So I have a simple snippet of C++ code which is SUPPOSED to insert a node into a binary search tree. It returns true if the value is successfully inserted and false if the value is already in the tree.
...ANSWER
Answered 2021-Jun-01 at 20:08You invoke undefined behaviour right there:
QUESTION
So I have an assignment and a little stumped on the last part (very new so bear with me).
I have two files "birds.txt" and "birds2.txt". essentially I have the first part done where it will read "birds.txt" and sort them in a list by frequency of how many times a specific bird is seen which works fine (how many times the name of any given bird appears in the "birds"txt").
The part I can't seem to wrap my head around is how I would take my existing list and compare it to my second file "birds2.txt" and then have it remove any duplicate entries. So the first and second file will have some of the same birds and if when reading the second file it finds a bird already in the list it removes it then prints this "new" list again.
I apologize if I'm not clear enough or missing any info...below is my code up to where I'm at.
...ANSWER
Answered 2021-Jun-01 at 16:52I think deletion while comparing with strings loaded from file is somewhat similar to first part of your problem where you were adding items to the list. You can create a method in your class which will scan the file line by line, search for a match for that line in linked list and remove if it's a match.
I was able to do that with three helper methods:
QUESTION
I'm using Z.Blazor.Diagrams package version 2.0.0 in my blazorise .Net core 5 client side project to create and show an organization chart. every thing is working fine and I can create my chart, my problem is how to show my graph in the format of organization chart. I've searched but didn't find any way. this is part of my code to show the chart:
...ANSWER
Answered 2021-Jun-01 at 09:27I solved it by saving position in database. On every node movement point(x,y) changes so I create the chart in the shape that I want and show it just same as created
QUESTION
#include
#include
#include
typedef struct Node {
int key;
struct Node *left;
struct Node *right;
} Node;
Node *search(Node *root, int x) {
Node *p = root;
while (p != NULL) {
if (p->key == x) {
return p;
}
else if (p->key < x) {
p = p->right;
}
else {
p = p->left;
}
}
return NULL;
}
Node *insert(Node *root, int x) {
Node *p = root;
Node *parent = NULL;
while (p != NULL) {
parent = p;
if (p->key == x) {
printf("same key.\n");
return p;
}
else if (p->key < x) {
p = p->right;
}
else {
p = p->left;
}
}
Node *newNode = (Node *)malloc(sizeof(Node));
newNode->key = x;
newNode->left = NULL;
newNode->right = NULL;
if (parent != NULL) {
if (parent->key < newNode->key) {
parent->right = newNode;
}
else {
parent->left = newNode;
}
}
return newNode;
}
Node *delete(Node *root, int x) {
Node *p = root;
Node *parent = NULL;
while ((p != NULL) && (p->key != x)) {
parent = p;
if (p->key < x) {
p = p->right;
}
else {
p = p->left;
}
}
if (p == NULL) {
printf("No Node you want.\n");
return root;
}
if (p->left == NULL && p->right == NULL) {
if (parent == NULL) {
root = NULL;
}
else {
if (parent->left == p) {
parent->left = NULL;
}
else {
parent->right = NULL;
}
}
}
else if (p->left == NULL || p->right == NULL) {
Node *child = (p->left != NULL) ? p->left : p->right;
if (parent == NULL) {
root = child;
}
else {
if (parent->left == p) {
parent->left = child;
}
else {
parent->right = child;
}
}
}
else {
Node *succeccor_parent = p;
Node *succeccor = p->left;
while (succeccor->right != NULL) {
succeccor_parent = succeccor;
succeccor = succeccor->right;
}
p->key = succeccor->key;
if (succeccor_parent->right == succeccor) {
succeccor_parent->right = succeccor_parent->left;
}
else {
succeccor_parent->left = succeccor_parent->left;
}
p = succeccor;
}
free(p);
}
void display(Node *root) {
if (root == NULL) {
return;
}
printf("%d\n", root->key);
display(root->left);
display(root->right);
}
int main() {
// FILE *ip = fopen("C:\\VScode\\final\\input.txt", "r");
Node *root = insert(NULL, 5);
insert(root, 2);
insert(root, 18);
insert(root, 1);
insert(root, 3);
insert(root, 8);
insert(root, 6);
insert(root, 11);
insert(root, 7);
display(root);
return 0;
}
ANSWER
Answered 2021-May-29 at 11:15You can get the output you want by changing display to print lines showing the key of the current node and its children:
QUESTION
For context, the function below takes the parameter "rank" as an uppercase letter (EX: "A"). "#nodeField" is a div.
When the code is run, the code below will interpret the input "rank" and append an "h1" to the "nodeField". Every "h1" has a different id, with the first letter being its rank and the second letter being its position in the rank (see lines 19 and 21). The for-loop at line 8 should test if any "h1" of the next rank exists in the "nodeField" (EX: If the input rank is "A", test if any "h1"s with rank "B" exist). If any "h1" of the next rank does exist, nextNodeRank should equal true (this variable affects the if-statement on line 17).
Does anyone know how to fix the for-loop so that the expected output occurs?
...ANSWER
Answered 2021-May-29 at 02:56Focusing strictly on your question "test if any h1 of the next rank exists in the nodeField", that could be done without looping using an attribute selector.
QUESTION
I am currently working on a homeworking question and I have been trying to figure out why I keep getting a segmentation fault (core dump). I have narrowed it down to accessing an array within a function. The goal of the program is to store words from a book in a separate chaining hash table. And we can't use STL.
The array in question (Table size is 30000):
...ANSWER
Answered 2021-May-28 at 22:36Thanks to both @AlanBirtles, @user4581301, and @tadman for the answers that they provided. It turns out that I had not initialized the nodes within the array to anything, so a simple for loop going through the hashTable array and setting everything to nullptr, along with the suggestions from the aforementioned users fixed the problem I was having.
SOLUTION
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