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• Extricate substring using powershell

  - by achi

  Hi, How can i extricate substring from string using powershell ? I have this string: "-----start-------Hello World------end-------", i have to the hello world. What is the best way to do that? Thanks!

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• Regexp in bash for number between "quotes"

  - by MArio

  Input: hello world "22" bye world I need a regex that will work in bash that can get me the numbers between the quotes. The regex should match 22. Thanks!

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• Simple to program yet computationally difficult functions

  - by ViralShah

  I need an example of a slow Excel sheet that could exist in the real world. Problem is I'm not sure what sort of functions are computationally difficult. Are there any sort of (maths?) functions that are easy enough to program that they can be used in Excel, yet computationally expensive? Something which has a real world application is a bonus.

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• Why Does My Floating Point Number 0.7 Evaluate At Less Than 0.7

  - by swamy

  void main() { float a=0.5,b=0.7; if(b<0.7) { if(a<0.5) printf("hello"); else printf("world"); } else printf("jsdf"); } Output: world Please give the explanation.

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• printing the instance in Python

  - by kame

  Hello! With this code: class Complex: def __init__(self, realpart, imagpart): self.real = realpart self.imag = imagpart print self.real, self.imag class Circle: def __init__(self, radius): print "A circle wiht the radius", radius, "has the properties:" print "circumference =", 3.14*radius print "area =", 3.14*radius**2 I get this output: >>> Complex(3,2) 3 2 <__main__.Complex instance at 0x01412210> But why does he print the last line?

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• Get values between DIV tags?

  - by Khou

  How do I get the values in between a DIV tag? Example <div id="myOutput" class="wmd-output"> <pre><code><p>hello world!</p></code></pre> </div> my output values I should get is <pre><code><p>hello world!</p></pre>

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• Web UI for inputting a function from the reals to the reals, such as a probability distribution.

  - by dreeves

  I would like a web interface for a user to describe a one-dimensional real-valued function. I'm imagining the user being presented with a blank pair of axes and they can click anywhere to create points that are thick and draggable. Double-clicking a point, let's say, makes it disappear. The actual function should be shown in real time as an interpolation of the user-supplied points. Here's what this looks like implemented in Mathematica (though of course I'm looking for something in javascript):

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• Debugger console is not opening

  - by coure06

  I have created a simple hello world application in xcode using the command line utility. When i click on Build and Run. program successfully builds. I can see a message at status bar "Debugging of HelloMac ended normally" But debugger console on which Hello World message should appear is not opening.

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• grep options (unix)

  - by lego69

  hello everyone, can You explain please, can grep pick rows if at least one element from the list appeared, for exmaple grep "hello world" file1 grep must give me all rows which have or word hello or world or both of them, thanks in advance

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• are there any useful datasets available on the web for data mining?

  - by niko

  Hi, Does anyone know any good resource where example (real) data can be downloaded for experimenting statistics and machine learning techniques such as decision trees etc? Currently I am studying machine learning techniques and it would be very helpful to have real data for evaluating the accuracy of various tools. If anyone knows any good resource (perhaps csv, xls files or any other format) I would be very thankful for a suggestion.

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• How to modify this c++ code so it doesn't overwrite the whole file

  - by Phenom

  ofstream f("test",app); f.seekp(5,ios::beg); f << "hello world"; f.close(); What I'm trying to do here is open a file that already has data in it, and then put "hello world" somewhere in the middle of the file. However, when I run my code, it overwrites the whole file. How can this code be fixed?

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• From iPhone to Android Question

  - by BahaiResearch.com

  (I'm coming from an iPhone dev world. ) In Android do we need to worry what OS version we compile against? In the iPhone world I would usually target a release that's at least 6 months old to limit the number of issues with installing on iPhones with old OSs. What strategy should I use when choosing what to compile against on the Android?

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• What is the 'accumulator in HQ9+?

  - by Koning Baard XIV

  I was just reading a bit about the HQ9+ programming language ( http://esolangs.org/wiki/HQ9 , http://en.wikipedia.org/wiki/HQ9%2B and http://www.cliff.biffle.org/esoterica/hq9plus.html ), and it tells me something about a so called 'accumulator' which can be incremented, but not be accessed. Also, using the + doesn't manipulate the result: code H+H result Hello World Hello World Can anyone explain me how this works, what this does and if it even makes any sense? Thanks

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• Which SDK should I use to visualize medical images in 3D?

  - by baris_a

  I need to process DICOM formatted medical images and visualize them in 3D, also do some image processing on these images on real-time. Therefore, I am asking this question to learn which SDK has better real-time characteristics for medical visualization and image processing?

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• App Engine - Java AppStats - It shows all requests as cpu time of 0.

  - by Spines

  All lines in my AppStats look like this: real=19ms cpu=0ms api=0ms overhead=0ms, it has the correct real time, but the other values are always 0. Anyone have this problem before or know how to fix this?

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• Formatting text received via api

  - by greenFrog

  I get text via api and sometimes the text can be like so: hello world! How are you? But I do need the text to be like this: hello world! How are you? How to do that?

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• Perl, "closure" using Hash

  - by Mike

  I would like to have a subroutine as a member of a hash which is able to have access to other hash members. For example sub setup { %a = ( txt => "hello world", print_hello => sub { print ${txt}; }) return %a } my %obj = setup(); $obj{print_hello}; Ideally this would output "hello world"

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• PHP coding - A class for each view or one class to rule them all?

  - by Kyle

  I am starting my first "programming" project in PHP making some sort of web application that give the linux program, Motion, a decent web interface. Anyways, I was curious as to how when real applications are programmed, do y'all go for a class for each view or one single class for the application altogether? I know this is more of a preference thing, I was just curious as to how it happens in real software.

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• JQuery search page textbox

  - by Geetha

  Hi all, I am creating a search page using asp.net[c#] with jquery. Needs: If we are typing a word in the text box, for each letter it has to display the related word in the database. ex: step 1. w [display: world Whole] step 2: wor[display: World] How to achieve this using jquery Geetha.

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• How to make c++ console application not exit until user presses any key?

  - by user198729

  #include <iostream> using namespace std; int main() { cout << "!!!Hello World!!!" << endl; // prints !!!Hello World!!! return 0; } The exe generated by the above will exit automatically,how to change the behavior?

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• A better javascript to string function?

  - by Jeff

  Before I go and create this myself, I thought I'd see if anyone knows a library that does this. I'm looking for a function that will take something in Javascript, be it an array, an associative array, a number, or even a string, and convert it to something that looks like it. For example: toString([1,2,3]) === '[1, 2, 3]' toString([[1,2], [2,4], [3,6]]) === '[[1,2], [2,4], [3,6]]' toString(23) === '23' toString('hello world') === 'hello world' toString({'one': 1, 'two': 2, 'three': 3}) === "{'one': 1, 'two': 2, 'three': 3}"

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• What's the equivalent of PHP's " .= " in Javascript, to add something to a variable..?

  - by pnichols

  In PHP you can do: $myvar = "Hello"; $myvar .= " world!"; echo $myvar; The output is: Hello world! How can I do this in Javascript/jQuery..?

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• closure not working

  - by dorelal

  var Dog = function() { var _instance = 'hello world'; return function() { console.log(this._instance); } } (); //note that it is self invoking function var l = new Dog(); //#> undefined In the above case I was expecting output of 'hello world'. Why this._instance is not accessing the the varible which should be accessible by virtue of closure. I tested this in FF and am getting undefined.

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• PHP $array[0] in $string for JSON

  - by user1907696

  I am trying to use PHP to make a JSON file. Part of the code is as follow $array = array("hello", "world"); $string='{"person": [ { "name":'$array[0];', "age":'$array[1];' } ] }'; The file created. However, $array[0] and $array[1] doesn't return the values "hello" and "world" but as $array[0] and $array[1] Any idea? Thanks

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• Why using namespace std is necessary here?

  - by symfony

  #include <iostream> using namespace std; int main() { cout << "!!!Hello World!!!" << endl; // prints !!!Hello World!!! return 0; } If I remove the 2nd statement,the build will fail. Why is it necessary?

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