nodes | 易学教程

Change the collision behavior of many nodes stored in an array

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when using the force layout in d3.js it is possible to push nodes away with the help of the collision force by increasing an imaginary radius that surrounds the nodes. I created a seperate button named button and i want to use .data() (to select a whole array) to increase the collide radius into 40 of many nodes when click on that button. For example when a filtered number of nodes is stored in an array called abc , i tried this code: var node =...... .on("click", function(d, i) { abc = start && start.path(d) || []; node.style("fill", function(n) { if (n == start ) { return "yellow"; } else if

Mongoose/Mongo find in array of objectIds

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问题 I have this item in mongo: [ { title: 'Product Name', _id: 5052843e023273693300013c, description: 'This is a fake description', categories: [ 5052843e023273693300010a ], } ] I want to find products like this that have this category. I have tried: Product.find({ categories: mongoose.Types.ObjectId('5052843e023273693300010a')}) Product.find({ categories: mongoose.mongo.BSONPure.ObjectID.fromString('5052843e023273693300010a')}) Product.find({ categories: '5052843e023273693300010a'}) Product.find

Deleting the last element in my linked list

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问题 I've created a list using only the Node class class Node: def __init__(self, init_data): self.data = init_data self.next = None def get_data(self): return self.data def get_next(self): return self.next def set_data(self, new_data): self.data = new_data def set_next(self, new_next): self.next = new_next def __str__(self): return str(self.data) I've intialized the list and the last Node is None . I'm trying to delete this node but don't know how to? 回答1: One good way to do this is to keep track

Java: binary tree recursion methods

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问题 I'm quite new to java and one of our assignments requires me to create a binary tree containing nodes with int values. My professor wants us to use one class containing the main method. I applied two recursive methods, one to insert a node and one to display existing nodes. Whenever I run my code however, the console only displays the most recent node that I entered. Is there something wrong with the methods I used? This is what I have so far: import java.util.Scanner; public class node {

Reading .csv file into C LinkedList

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问题 I have the following struct : struct NODE { char username[50]; char password[50]; char usertype[50]; struct NODE *next; } *head=NULL; I would like to read from a .csv file, say database.csv of the form username, password, usertype , tokenize each line into tokens using strtok and put each token inside the right field. For instance, my file looks like this: johnnydepp, pirate123, user tonystark, iron456, sysop I keep reading on C LinkedList , but I cannot figure it out. Any help would be

Graphviz edges between ports belonging to the same record node look bad

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问题 I'm attempting to create function call graphs for specific code execution paths within Linux. I have the following digraph, which uses record fields (they are deprecated, I know, I just started using graphviz and only recently saw that): digraph { node[fontsize=9,shape=Mrecord,style=filled,fillcolor=white]; subgraph cluster_0 { style=filled; fillcolor=lightgrey; open[label="open.c|{<f0>do_sys_open()}"]; namei[label="namei.c|{<f0>do_filp_open()\l|\ <f1>path_lookup_open()\l|\ <f2>do_path_lookup

Change the collision behavior of many nodes stored in an array

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问题 when using the force layout in d3.js it is possible to push nodes away with the help of the collision force by increasing an imaginary radius that surrounds the nodes. I created a seperate button named button and i want to use .data() (to select a whole array) to increase the collide radius into 40 of many nodes when click on that button. For example when a filtered number of nodes is stored in an array called abc , i tried this code: var node =...... .on("click", function(d, i) { abc = start

Graphviz: Node internal orientation

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问题 The following graphviz code: digraph g { labelloc="t"; label="Feed creation process"; graph [ rankdir = "LR" ]; node [ fontsize = "16" shape = "record" ]; edge []; abc [shape=none, margin=0, rankdir="" label=< <TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0" CELLPADDING="4"> <TR><TD ROWSPAN="3"><FONT COLOR="red">hello</FONT><BR/>world</TD> <TD COLSPAN="3">b</TD> <TD ROWSPAN="3" BGCOLOR="lightgrey">g</TD> <TD ROWSPAN="3">h</TD> </TR> <TR><TD>c</TD> <TD PORT="here">d</TD> <TD>e</TD> </TR> <TR>

Getting all nodes inside a tag

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问题 I have a code like this: <div id="container"> Lorem ipsum dolor sit amet <p>This is a paragraph</p> <br /> <span>This is a span</span> Lorem ipsum dolor sit amet </div> Is it possible to get all text nodes and tags inside this div? I want to access each node (including texts) via an array. for example: for(var i=0;i<nodesArray.length;i++) { document.write("Node: "+nodesArray[i]+"<br />"); } OUTPUT: Node: Lorem ipsum dolor sit amet Node: This is a paragraph Node: This is a span Node: Lorem

Assign txt file data to struct node in linked list

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问题 Ok so I have never worked with fstream before or opened and read and files in a program. My instructor just gave a few lines of code that open, read, and close a text file. I'm supposed to take the data out of the text file and put it into separate nodes in a linked list and then go on to do other things with it which is not important because I know how to do it. My problem is that I don't know how to a assign these values to the struct values. The txt file looks like this: Clark Kent 55000