dynamic

问题 I've never used JFreeChart before. It has been told me that it's a pretty good product for drawing charts in Java. I have a doubt, and I would like to have some advices by someone that has already some JFreeChart experience: is JFreeChart designed only for display static precomputed set of values? Or is there any "pretty easy" way to handle mouse event (possibly dragging) in order to dynamically change the displayed curves (and consequentely the associated data set)? With "pretty easy" I mean

问题 I have to add dynamic fields at run time in my django application,but I don't know the proper way how to add new fields at run time. I want to add the code which will generate the dynamic field and will update database too. I am using postgresql database. please help if anyone can. My "model.py" is simply like this: class Student(models.Model): name=models.CharField(max_length=100) school=models.CharField(max_length=100) created_at=models.DateField(auto_now_add=True) is_active=models

问题 I want define a variable in groovy with where the variable name is passed by another variable. Something like. def runExtFunc(varName){ def varName // => def abc varName = load 'someFile.groovy' // abc = load 'someFile.groovy' varName."$varName"() // -> abc.abc() (run function defined in File) } [...] runExtFunc('abc') // -> abc.abc() (Function abc defined in File) [...] runExtFunc('xyz') // -> xyz.xyz() (Function xyz defined in File) [...] Sadly def varName defines the variable varName and

问题 I made an application that would show me Max, Minimum, and Average ping when I click "start" in my JFrame application. I made a white box so I could fit a dynamically changing line graph that will be in the same window as my stats, and will update at the same rate as my stats (1 second). No matter how much I google, everybody seems to understand the JFreeChart sample code. I do not understand how to implement that at all. Other tutorials show just the graph as a standalone in its own window.

问题 I made an application that would show me Max, Minimum, and Average ping when I click "start" in my JFrame application. I made a white box so I could fit a dynamically changing line graph that will be in the same window as my stats, and will update at the same rate as my stats (1 second). No matter how much I google, everybody seems to understand the JFreeChart sample code. I do not understand how to implement that at all. Other tutorials show just the graph as a standalone in its own window.

问题 I'm trying to dynamically create a collection with collections nested within. So far, I've been able to create a nested collection by typing everything (see below). However, I have a ( horrible ) spreadsheet that has a repeating set of 17 questions hundreds of times in one column, and the answers in the next column. I'm trying to get the answer to each question as an item, and the question itself as the index. The unique set of the 17 questions will be a collection within a collection of the

问题 I need to have a menu that has items that size themselves based on how many there are. Say, there are three items. Each one would have about 33% width of the container. But if there were were ten, each would have 10%. Does anyone have any ideas/suggestions? Thanks! 回答1: Usually menu is built from unordered list and parent menu element have id="menu" In this case you'll need code like next: menuElt = document.getElementById('menu'); childElements = menuElt.getElementsByTagName("li"); var

问题 I have a list of items. like banana , apple , orange etc. Each of these has it´s properties, like banana : 'name': 'banana','color': 'yellow' etc. What I'm trying to do is create variable's for each item. So i can call it like fruit.banana['color'] and get the value yellow back. Code example: fruits = cur.fetchall() for fruittarget in fruits: fruit = fruittarget['name'] cur.execute("SELECT * FROM fruits where name = %s ;",(fruit)) rows = cur.fetchone() name = rows["name"] fruitfunc = {name:

问题 I'm trying create dynamic drop down list in MS Excel O365. I've made 2 tables in 2 different sheets. In below are table in "Workers" sheet: And in "Order_status" sheet: As for as these tables are concerned i inserted that data manualy. Now i'd like create dynamic drop down which in "ID_Worker" i get data from "Workers" sheet and when i select ID_WORKER in "Order_status" sheet: a) not only displays ID_WORKER, FNAME, LNAME (For example 1 Paul Boy) b) Automatically writes data into ID_WORKER,

问题 I'm trying to implement a linked list in a CUDA application to model a growing network. In oder to do so I'm using malloc inside the __device__ function, aiming to allocate memory in the global memory. The code is: void __device__ insereviz(Vizinhos **lista, Nodo *novizinho, int *Gteste) { Vizinhos *vizinho; vizinho=(Vizinhos *)malloc(sizeof(Vizinhos)); vizinho->viz=novizinho; vizinho->proxviz=*lista; *lista=vizinho; novizinho->k=novizinho->k+1; } After a certain number of allocated elements