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  • Selecting an area from displayed image using CImg library

    - by sravan
    hi all, i use CImg for my image processing work. I had written a small piece of code which is follows: #include "../CImg.h" #include <iostream> using namespace std; using namespace cimg_library; int main(int argc,char**argv) { CImg<int> img(argv[1]); CImgDisplay disp; disp.assign(img); while(!disp.is_closed) disp.wait(); return 0; } Now i want to select an area from the displayed image. Can some one tell me how to select an area from displayed image and store the selected pixels, and display the selected region in different display window. If some one can provide code, it will be of great help to me. Thank you all

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  • Getting the Leftmost Bit

    - by James
    I have a 5 bit integer that I'm working with. Is there a native function in Objective-C that will let me know which bit is the leftmost? i.e. I have 01001, it would return 8 or the position. Thanks

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  • list or container O(1)-ish insertion/deletion performance, with array semantics

    - by Chris Kaminski
    I'm looking for a collection that offers list semantics, but also allows array semantics. Say I have a list with the following items: apple orange carrot pear then my container array would: container[0] == apple container[1] == orangle container[2] == carrot Then say I delete the orange element: container[0] == apple container[1] == carrot I don't particularly care if sort order is maintained, I'd just like the array values to function as accelerators to the list items, and I want to collapse gaps in the array without having to do an explicit resizing.

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  • Java Regular Expression. Check if String contains ONLY Letters

    - by user69514
    How do I check if a String contains only letters in java? I want to write an if statement that will return false if there is a white space, a number, a symbol or anything else other than a-z A-Z. My string must contain ONLY letters. I thought I could do it this way, but I'm doing it wrong: if( ereg("[a-zA-Z]+", $myString)) return true; else return false;

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  • Wrong image dimensions when it's dynamically loaded on a page the 1st time

    - by Nikita Barsukov
    I have the following piece of Javascript code on my web-page var central_image = document.createElement("img") central_image.setAttribute("src", imgs[curr_image_no - 1]); central_image.setAttribute("name", "jpeg"); document.getElementById("photo").appendChild(central_image); central_image.onload = getDimensions(); //function that alerts image dimensions Now, when the central_image is loaded for the 1st time in Firefox, its height always equals to 0. In IE its dimensions are 28 x 30 pixels. When I reload image, its dimensions are OK in both browsers. I guess the problem is that function getDimensions() starts before image was loaded completely. How to change that?

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  • How Do I Remove The First 4 Characters From A String If It Matches A Pattern In Ruby

    - by James
    I have the following string: "h3. My Title Goes Here" I basically want to remove the first 4 characters from the string so that I just get back: "My Title Goes Here". The thing is I am iterating over an array of strings and not all have the h3. part in front so I can't just ditch the first 4 characters blindly. I have checked the docs and the closest think I could find was chomp, but that only works for the end of a string. Right now I am doing this: "h3. My Title Goes Here".reverse.chomp(" .3h").reverse This gives me my desired output, but there has to be a better way right? I mean I don't want to reverse a string twice for no reason. I am new to programming so I might have missed something obvious, but I didn't see the opposite of chomp anywhere in the docs. Is there another method that will work? Thanks!

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  • Finding all instances of a substring in a string

    - by Mr Aleph
    In my last question I asked about parsing the links out of an HTML page. Since I haven't found a solution yet I thought I tried something else in the meantime: search for every <a href= and copy whatever is there until I hit a </a>. Now, my C is a bit rusty but I do remember i can use strstr() to get the first instance of that string, but how do I get the rest? Any help is appreciated. PS: No. This is not homework on school or something like that. Just so you know.

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  • List all form related errors in django

    - by Mridang Agarwalla
    Hi, Is there a direct way of listing out 'all' form errors in Django templates. I'd like to list out both field and non-field errors and any other form errors. I've found out how to do this on a per-field basis but as said earlier, I'd like to list out everything. The method I'm using doesn't seem to list out everything. {% for error in form.errors %} {{ error|escape }} {% endfor %} Thanks.

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  • Combine Lists with Same Heads in a 2D List (OCaml)

    - by Atticus
    Hi guys, I'm working with a list of lists in OCaml, and I'm trying to write a function that combines all of the lists that share the same head. This is what I have so far, and I make use of the List.hd built-in function, but not surprisingly, I'm getting the failure "hd" error: let rec combineSameHead list nlist = match list with | [] -> []@nlist | h::t -> if List.hd h = List.hd (List.hd t) then combineSameHead t nlist@uniq(h@(List.hd t)) else combineSameHead t nlist@h;; So for example, if I have this list: [[Sentence; Quiet]; [Sentence; Grunt]; [Sentence; Shout]] I want to combine it into: [[Sentence; Quiet; Grunt; Shout]] The function uniq I wrote just removes all duplicates within a list. Please let me know how I would go about completing this. Thanks in advance!

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  • String Parsing in C#

    - by Betamoo
    What is the most efficient way to parse a C# string in the form of "(params (abc 1.3)(sdc 2.0)....)" into a struct in the form struct Params { double abc,sdc....; } Thanks EDIT The structure always have the same parameters (number and names).. but the order is not granted..

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  • How do I apply a string function to an array?

    - by ggg
    I was fortunate enough to receive this code (flips Lastname, Firstname) from an earlier post. $name = "Lastname, Firstname"; $names = explode(", ", $name); $name = $names[1] . " " . $names[0]; How do I apply the function to each value in an array that is in the form: $ginfo ->$(LastName, FirstName). I tried the code below, but it doesn't work. $name1 =($ginfo->White); $name1 = explode(", ", $name1); $FLw = $name1[1] . " " . $name1[0]; foreach ($name1 as ($ginfo->White)) {return($FLw);}

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  • get last 5 character vb.net

    - by Chocho
    i want to get the last 5 digits/strings from a strings of words. eg: "I will be going to school in 2011!" i am using visual studio.net 2008 and using vb.net. i will like to get "2011!" note, my strings changes, and the last 5 characters can be anything! any ideas. i know visual basic have Right(string, 5); this didn't work for me gave me an error. thanks

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  • Regular expression to retrieve everything before first slash

    - by alex
    I need a regular expression to basically get the first part of a string, before the first slash (). For example in the following: C:\MyFolder\MyFile.zip The part I need is "C:" Another example: somebucketname\MyFolder\MyFile.zip I would need "somebucketname" I also need a regular expression to retrieve the "right hand" part of it, so everything after the first slash (excluding the slash.) For example somebucketname\MyFolder\MyFile.zip would return MyFolder\MyFile.zip.

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  • !Contains() of List object doesnt work

    - by Tony
    I am using Contains() to identify something that NOT contain in the list. So something like, if(!list.Contains(MyObject)) { //do something } but, the whole if statment goes to true even though MyObject is already in the list. Anybody what I am doing wrong? Thank you

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  • Delete all characters in a multline string up to a given pattern

    - by biffabacon
    Using Python I need to delete all charaters in a multiline string up to the first occurrence of a given pattern. In Perl this can be done using regular expressions with something like: #remove all chars up to first occurrence of cat or dog or rat $pattern = 'cat|dog|rat' $pagetext =~ s/(.*?)($pattern)/$2/xms; What's the best way to do it in Python?

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  • How can we extract substring of the string by position and sepretor.

    - by Harikrishna
    How can we divide the substring from the string Like I have string String mainString="///Trade Time///Trade Number///Amount Rs.///"; Now I have other string String subString="Amount" Then I want to extract the substring Amount Rs. with the help of second string named subString not by any other method But it should be extracted through two parameters like first is I have index no of Amount string and second is until the next string ///.

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  • Get the last '/' or '\\' character in Python

    - by wowus
    If I have a string that looks like either ./A/B/c.d OR .\A\B\c.d How do I get just the "./A/B/" part? The direction of the slashes can be the same as they are passed. This problem kinda boils down to: How do I get the last of a specific character in a string? Basically, I want the path of a file without the file part of it.

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  • How does PHP's list function work?

    - by Jacob Relkin
    After recently answering a couple of questions here on SO that involved utilizing PHP's list function, I wondered, "how in the world does that function actually work under the hood?". I was thinking about something like using func_get_args() and then iterating through the argument list, and that's all nice and peachy, but then how in the world does the assignment part work? list(...) = array($x, $y, $z); isn't this ^ evaluated first? So to be precise, my question is how is the list function able to create scoped variables which get assigned to the not-yet evaluated array?

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  • How to remove all special characters from URL?

    - by NeoNmaN
    Hello all. I have my class public function convert( $title ) { $nameout = strtolower( $title ); $nameout = str_replace(' ', '-', $nameout ); $nameout = str_replace('.', '', $nameout); $nameout = str_replace('æ', 'ae', $nameout); $nameout = str_replace('ø', 'oe', $nameout); $nameout = str_replace('å', 'aa', $nameout); $nameout = str_replace('(', '', $nameout); $nameout = str_replace(')', '', $nameout); $nameout = preg_replace("[^a-z0-9-]", "", $nameout); return $nameout; } BUt I can't get it to work when I use special characters like ö and ü and other, can sombody help me here? I use PHP 5.3.

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  • Parse multiple filters in SQL

    - by Jeff Meatball Yang
    I have a problem parsing a stored procedure parameter in the form: declare @S varchar(100) set @S = '4=2,24=1534' Here's the query: select cast(idx as varchar(100)) 'idx' , value , SUBSTRING(value, 1, charindex(value, '=')+1) 'first' , SUBSTRING(value, charindex(value, '=')+1, LEN(value)-charindex(value, '=')-1) 'second' from Common.SplitToTable(@S, ',') -- returns (idx int, value varchar(max)) where len(value) > 0 But here is the result I get: idx value first second 0 4=2 4 4= 1 24=1534 2 24=153 Here's what I expected: idx value first second 0 4=2 4 2 1 24=1534 2 1534 Help?

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