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• Generating list of million random elements

  - by Fakrudeen

  How to efficiently generate a list of million random elements in scheme? The following code hits maximum recursion depth with 0.1 million itself. (unfold (lambda(x)(= x 1000000)) (lambda(x)(random 1000)) (lambda(x)(+ x 1)) 0)

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• C++ Class Construction and Member Initialization

  - by anachoret

  The first print shows the member value to be false, and the other two prints show it as true. Why does the first output differ from the last two? #include #include using namespace std; class MyClass { public: bool value; bool stuff; }; class Container { public: vector my_classes; Container() { MyClass c; cout

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• get Error Message

  - by pAkY88

  I have two servlet: first servlet is similar to a client and creates an HttpURLConnection to call the second servlet. I would like send a special error, formatted like a JSON object, so I call sendError method in this way: response.sendError(code, "{json-object}") But in the first servlet when I read error with getResponseMessage method I just get standard HTTP message and not my json object as a string. How I can get my json string?

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• Find all occurrences of a substring in Python

  - by cru3l

  Python has string.find() and string.rfind() to get the index of a substring in string. I wonder, maybe there is something like string.find_all() which can return all founded indexes (not only first from beginning or first from end)? For example: string = "test test test test" print string.find('test') # 0 print string.rfind('test') # 15 #that's the goal print string.find_all('test') # [0,5,10,15]

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• How To determine the order data is read from a MYSQL Database?

  - by Shinigami

  is there a way to change the order data from a DB are read ? you know , the default order is that they are read from the first data inserted to the latest so is there a way to change it to latest-first?

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• Does F# have an equivalent to Haskell's take?

  - by McMuttons

  In Haskell, there is a function "take n list" which returns the first n elements from a list. For example "sum (take 3 xs)" sums up the first three elements in the list xs. Does F# have an equivalent? I expected it to be one of the List-functions, but I can't spot anything that seems to match.

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• datbase or application logic (Flow recommendation)

  - by Zai

  What is the best way or recommended best practice in the flow of database driven asp.net web application? I mean the Database first or coding first or side by side?

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• Transfer values from one selection box to another

  - by Tonya Cash

  I need to populate the first box with the items from a db table. Users would choose from the first box, and either drag value(items) to the second for selection, or would select items, and then click a button to move them over to the 2nd box. After that I need to update the db with the selected values/items.

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• Is it possible to format C++ code with VIM?

  - by Werner

  Hi, I am rather new to VIM. I got some source code and this is a mess. At a first sight I would like at least to get a clear and organised view of the code, so I like to get it rightly formatted, I mean indented depending on the depth of the functions and so. I wonder if it can be done with VIM, and otherwise which other commandline tools for that can you recommend. Thanks

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• Click() works in IE but not Firefox

  - by Tom Andrews

  I have code which is trivial but only works in IE not Firefox. $(document).ready(function(){ $('li#first').click(); }); I have also tried: document.getElementById('first').click(); But that doesn't work either. Is this an IE bug/feature or is click() not supported in the other browsers? Thanks in advance.

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• nested sql statements

  - by Hadad

  Hello, I've a self join table when I delete or update it's id I want to delete or update all the direct and indirect affected records SQL server does not allow this type of cycle cascading I've decided to use triggers but this triggers will file recursively and they will be terminated at 34 level and I don't know the depth of records and event I disable the trigger and re enable it after completing the process how can I construct a SQL statement that achieve this logic?

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• Is there a way to open a child form in visual studio in exactly the same place as the parent form?

  - by Ruth

  I have one form opening a second form which is meant to look like it's replaced the first form but it opens a bit to the right and down which ruins the effect. If there a way to make it open wherever the first form may be? I am using visual studio, in C++

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• How to get a random node from a tree?

  - by ooboo

  It looks easy, but I found the implementation tricky. I need that for a simple genetic programming problem I'm trying to implement. The function should, given a node, return the node itself or any of its children such that the probability of choosing a node is normally distributed relative to its depth (so the function should return mostly middle nodes, but sometimes the root itself or the lowest ones - but that's not really necessary if that makes it significantly more complex, if all any node is chosen with equal probability, that's good enough). Thanks

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• Validate a string

  - by Activist

  I'm not that good with regular expressions... I need a JavaScript regular expression that will do the following: The string can contain letters (upper and lower case), but not punctuations such as éàïç... The string can contain numbers (0..9) anywhere in the string, except on the first position. The string can contain underscores (_). Valid strings: foo foo1 foo_bar fooBar Invalid strings: 1foo -- number as first character foo bar -- space föo -- punctuation ö Many thanks!

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• SQL Server, View using multiple select statements

  - by phil

  I've banging my head for hours, it seems simple enough, but here goes: I'd like to create a view using multiple select statements that outputs a Single record-set Example: CREATE VIEW dbo.TestDB AS SELECT X AS 'First' FROM The_Table WHERE The_Value = 'y' SELECT X AS 'Second' FROM The_Table WHERE The_Value = 'z' i wanted to output the following recordset: Column_1 | Column_2 'First' 'Second' any help would be greatly appreciated! -Thanks.

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• how to find file's path according to filename?

  - by Phsika

  how to find file's path according to filename? i need to find file's path according to file name sample code: string path= System.IO.Directory.GetDirectories(@"c:\", "kategori",System.IO.SearchOption.AllDirectories).First(); But i need : string path= System.IO.Directory.GetDirectories(@"anyFolder", "kategori",System.IO.SearchOption.AllDirectories).First();

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• Cakephp: how do I know what route was used

  - by Jason

  So I am a total cakephp newb and one of the first things I expected to see basic info about each page request logged. More specifically, what route data including what controller/method is being used. Obviously I did not find what I was expecting and about the only kind of meaning info I can find is from the apache logs. What I expected was to see something similar to first log entry for a rails app request. Does cakephp not log this kind of data?

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• What does it mean when a ByteInputStream keeps returning 0?

  - by Zombies

  I have a ByteInputStream, created from a Socket in Java. The connection is to a simple web server that uses chunked transfer encoding. The web server does in fact work in normal browser. But in my program, I am attempting to read, I read the first first bytes (some 5kb of data). But each read after that returns 0 bytes read. Isn't it supposed to block until it can read?

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• pointer&dynamic memory

  - by gcc

  how many methods are there taking input by using with pointer and dynamic memory input 3 1 2 n k l 2 1 2 p 4 55 62 * # x x is stop character and first input 3 is for another variable int hakko; only hakko use first input the others will be hold in one pointer and input size not determined

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• Simple question on database query.

  - by GK

  I have been asked in an interview, To write a sql query which fetches the first three records with highest value on some column from a table. i had written a query which fetched all the records with highest value, but didnt get how exactly i can get only first three records of those. could you help me in this. thanks.

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• Tagging the differencies in both files

  - by Hakim

  I know that comparing 2 files is a typical problem and there are many discussions on this problem. but I have a rather different problem while working with text files: I have two text files which may differ in number of lines. now I want to compare two files and find the lines which differ. after that I want to tag all the differencies in both of files. for example here are the content of my files: File1.txt: This is the first line. This line is just appeared in File1.txt. you can see this line in both files. this line is also appeared in both files. this line and, this one are mereged in File2.txt. File2.txt: This is the first line. you can see this line in both files. this line is also appeared in both files. this line and, this one are mereged in File2.txt. After processing I want both files to be like this: File1.txt: This is the first line. <Diff>This line is just appeared in File1.txt.</Diff> you can see this line in both files. this line is also appeared in both files. <Diff>this line and,</Diff> <Diff>this one are merged in File2.txt.</Diff> File1.txt: This is the first line. <Diff></Diff> you can see this line in both files. this line is also appeared in both files. <Diff>this line and, this one are mereged in File2.txt.</Diff> <Diff></Diff> How can I do this? I know that some tools such as diff could help me, but how can I convert their results in this format? Thank you in advance.

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• MacPorts / Terminal: `Unrecognized action "sudo"`

  - by Chris

  I'm trying to install Image Magick on MAMP. And I'm seriously out of my depth. I've installed MacPorts, and opened the terminal. I've typed in sudo port -v selfupdate per the instructions on http://www.macports.org/install.php#pkg But the response I get from the Terminal is Unrecognized action "sudo" I've googled and googled, but can't find anything that makes a slab of sense. Any clever people feeling generous?

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• MySql Not Like Regexp?

  - by KnockKnockWhosThere

  I'm trying to find rows where the first character is not a digit. I have this: SELECT DISTINCT(action) FROM actions WHERE qkey = 140 AND action NOT REGEXP '^[:digit:]$'; But, I'm not sure how to make sure it checks just the first character...

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• How do I can close/hide a frame based upon a button click event in wpf?

  - by tvimalarajah

  I have two frames I need to a load the second frame based on the button click event which is there in the first frame, and need to hide the first frame once the second frame is loaded.

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• javascript - query object graph?

  - by Scott

  Given an object like this: var obj = { first:{ second:{ third:'hi there' } } }; And a key like this "first.second.third" How can I get the value of the nested object "hi there"? I think maybe the Array.reduce function could help, but not sure.

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