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Search found 711 results on 29 pages for 'exercise'.

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• Does anyone has the experience of using the new p4 replicate command in their Perforce back-up /rest

  - by Thomas Corriol

  Hi all, we recently performed an upgrade of our whole perforce system to 2009.02 During this exercise, we noticed that the back-up /restore process that was installed here by the Perforce consultant a year ago was not completely working. Basically, the verify command has never worked (scary !). As we are obliged to revisit our Back-Up/Restore…

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• Read Text From Windows Form

  - by omghai2u

  I would like, if for no other reason that an academic exercise, to be able to read text written to a form on a Windows Application. The program appears to be written in non-.NET, but in .NET terms, I think you would describe the program as having a Form with a Label and I would like to read the text from that label. I believe I can see that…

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• Creating a PHP call home "time bomb" to protect my interests

  - by RC

  Hi everyone, I produced a PHP web app for a client some months back that is hosted on their own server. I have still not been paid for this work, and they are giving me the runaround. It turns out that I still have remote admin access to their server, so I can make code changes. What I was thinking of doing was to move the core kernel…

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• urlopen error [errno 111] connection refused

  - by Ui-Gyun Jeong

  I am doing python exercise with a book 'headfirst python' and making android app by using python and sl4a my code is import android import json import time from urllib import urlencode from urllib2 import urlopen hello_msg = "Welcome to Coach Kelly's Timing App" list_title = 'Here is your list of athletes:' quit_msg =…

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• Controlling symbol generation in Clojure macros

  - by mikera

  I'm trying (as a self-learning exercise) to create a Clojure macro that will generate code to apply a function to a sequence of integers and sum the result, e.g. f(0) + f(1) + f(2) + f(3) This is my attempt: (defmacro testsum [func n] `(fn [x#] (+ ~@( map (fn [i] `(~func x#)) (range n))))) However something seems to go wrong…

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• How to implement square root and exponentiation on arbitrary length numbers?

  - by tomp

  I'm working on new data type for arbitrary length numbers (only non-negative integers) and I got stuck at implementing square root and exponentiation functions (only for natural exponents). Please help. I store the arbitrary length number as a string, so all operations are made char by char. Please don't include advices to use…

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• WPF: Hidden parent and visible child

  - by oakskc

  As of last night, I decided to start learning about WPF and have been reading through a number of online tutorials and books. This is a huge shift. One feature that has fascinated me is the implicit property value inheritance. I know in the WinForms world, if a control is not visible then neither are any of the child…

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• Named keywords in decorators?

  - by wheaties

  I've been playing around in depth with attempting to write my own version of a memoizing decorator before I go looking at other people's code. It's more of an exercise in fun, honestly. However, in the course of playing around I've found I can't do something I want with decorators. def addValue( func, val ): def…

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• PHP upload to GoDaddy hosted site

  - by 105894384987190582154

  Hi, relatively new to both hosting and PHP, so apologies for (probably) missing the obvious, but… I built a page which would allow file uploads to my site, following the example laid out here: W3Schools PHP upload exercise Through the File Manage on my Godaddy hosting, I created a folder named ’upload’ so that the…

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• Cannot seem to communicate between views

  - by devnet247

  Hi all I have written a MVVM prototype as a learning exercise and I am struggling to understand how I can communicate between views.Let me explain I have a treeview on the left (leftSideView) ListView on the right (rightSideView) MainWindow (includes the 2 views mentioned above and a splitter) What I have…

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• Lookup function not working (RS SP2)

  - by Al Reyes

  Hi, I made the upgrade to SP2. I'm trying to use the Lookup function to link data from two different servers. I'm trying first a simple exercise linking data from two datasets from the same server, having one dataset with journals and the other with the account description. My Expression looks like this at a…

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• Can layouts be chosen by Grails controllers?

  - by maerics

  I'm building a CMS as a learning exercise in Grails and would like to give content managers the ability to choose between different HTML page structures (e.g. 2 column, 3 column, etc). Grails Layouts seem like a logical choice but is it possible for a Grails controller to explicitly name which layout will be…

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• created persisted computed columns when the user defined scalar function appears to be non-determini

  - by Ralph Shillington

  I have a scalar UDF that I know to be deterministic, however SQL doesn't. Is there a way to declare it as deterministic so that I can then use it in a persisted computed column definition? further clarification: The purpose of this exercise is that I need to harvest out specific values from an XML column on…

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• C# Reflection - How can I tell if object o is of type KeyValuePair and then cast it?

  - by Logan

  Hi All I'm currently trying to write a Dump() method from LinqPad equivalent iin C# for my own amusment. I'm moving from Java to C# and this is an exercise rather than a business requirement. I've got almost everything working except for Dumping a Dictionary. The problem is that KeyValuePair is a Value…

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• How can I implement a download rate limited in Java?

  - by JohnWithoutArms

  Hello, I'm going to implement a (simple) downloader application in Java as a personal exercise. It is going to run several jobs in different threads, in a way that I will be downloading a few files at the same time at all times during execution. I want to be able to define a download rate limit that is…

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• pyschool is wrong ?

  - by geekkid

  I'm currently learning python and trying to do exercises at pyschools (if anyone knows what it is). Anyway, i have an exercise that asks me to do the following : Write a function percent(value, total) that takes in two numbers as arguments, and returns the percentage value as an integer. Here's my…

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• Lazy sequence or recur for mathematical power function?

  - by StackedCrooked

  As an exercise I implemented the mathematical power function. Once using recur: (defn power [a n] (let [multiply (fn [x factor i] (if (zero? i) x (recur (* x factor) factor (dec i))))] (multiply a a (dec n)))) And once with…

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• Using write to print floating point numbers.

  - by Tom

  Hi, As an exercise to achieve something larger, i'm trying to use write to print a floating point number. I haven't done this in a while. I must be doing something wrong because I cant get it to work. Here is my code #include <unistd.h> int main(){ float f = 4.5; …

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• WPF: Creating instances of resources?

  - by oakskc

  I'm brand spanking new to WPF and am trying to play around with projects to better understand what I'm reading. My understanding of a resource is that it is the instance, you can't use it like a factory and create instances of it. For example, a XAML-defined rectangle. You can…

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• Why does the right-shift operator produce a zero instead of a one?

  - by mrt181

  Hi, i am teaching myself java and i work through the exercises in Thinking in Java. On page 116, exercise 11, you should right-shift an integer through all its binary positions and display each position with Integer.toBinaryString. public static void main(String[] args) { int i…

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• OCaml Summation

  - by Supervisor

  I'm trying to make a function in OCaml which does the summation function in math. I tried this: sum n m f = if n = 0 then 0 else if n > m then f else f + sum (n + 1) m f;; However, I get an error - "Characters 41-44: else f * sum(n + 1) m f;; Error: Unbound…

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• How can I profile a subroutine without using modules?

  - by Zaid

  I'm tempted to relabel this question 'Look at this brick. What type of house does it belong to?' Here's the situation: I've effectively been asked to profile some subroutines having access to neither profilers (even Devel::DProf) nor Time::HiRes. The purpose of this…

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• How to start coding the "Dining Philosophers" simulation?

  - by GrizzlyGuru

  I'm not a beginner at C# but I really need to increase my understanding, so I've picked a classic deadlock problem to code to help teach myself some of the more advanced concepts of C#. The Dining Philosophers Problem seems like a good one, but I need a little help…

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• difference between 2 pieces Python code

  - by draw

  Hello, I'm doing an exercise as following: # B. front_x # Given a list of strings, return a list with the strings # in sorted order, except group all the strings that begin with 'x' first. # e.g. ['mix', 'xyz', 'apple', 'xanadu', 'aardvark'] yields # ['xanadu',…

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• Can't remove first node in linked list

  - by carlmonday

  I'm trying to make a linked list class in python (pointless I know, but it's a learning exercise), and the method I have written to remove a node doesn't work if I try to remove the first element of the linked list. If the node to be removed is anywhere else in…

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