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• Java: method to get position of a match in a String?

  - by HH

  String match = "hello"; String text = "0123456789hello0123456789"; int position = getPosition(match, text); // should be 10, is there such a method?

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• trie reg exp parse step over char and continue

  - by forest.peterson

  Setup: 1) a string trie database formed from linked nodes and a vector array linking to the next node terminating in a leaf, 2) a recursive regular expression function that if A) char '*' continues down all paths until string length limit is reached, then continues down remaining string paths if valid, and B) char '?' continues down all paths for 1 char and then continues down remaining string paths if valid. 3) after reg expression the candidate strings are measured for edit distance against the 'try' string. Problem: the reg expression works fine for adding chars or swapping ? for a char but if the remaining string has an error then there is not a valid path to a terminating leaf; making the matching function redundant. I tried adding a 'step-over' ? char if the end of the node vector was reached and then followed every path of that node - allowing this step-over only once; resulted in a memory exception; I cannot find logically why it is accessing the vector out of range - bactracking? Questions: 1) how can the regular expression step over an invalid char and continue with the path? 2) why is swapping the 'sticking' char for '?' resulting in an overflow? Function: void Ontology::matchRegExpHelper(nodeT *w, string inWild, Set<string> &matchSet, string out, int level, int pos, int stepover) { if (inWild=="") { matchSet.add(out); } else { if (w->alpha.size() == pos) { int testLength = out.length() + inWild.length(); if (stepover == 0 && matchSet.size() == 0 && out.length() > 8 && testLength == tokenLength) {//candidate generator inWild[0] = '?'; matchRegExpHelper(w, inWild, matchSet, out, level, 0, stepover+1); } else return; //giveup on this path } if (inWild[0] == '?' || (inWild[0] == '*' && (out.length() + inWild.length() ) == level ) ) { //wild matchRegExpHelper(w->alpha[pos].next, inWild.substr(1), matchSet, out+w->alpha[pos].letter, level, 0, stepover);//follow path -> if ontology is full, treat '*' like a '?' } else if (inWild[0] == '*') matchRegExpHelper(w->alpha[pos].next, '*'+inWild.substr(1), matchSet, out+w->alpha[pos].letter, level, 0, stepover); //keep adding chars if (inWild[0] == w->alpha[pos].letter) //follow self matchRegExpHelper(w->alpha[pos].next, inWild.substr(1), matchSet, out+w->alpha[pos].letter, level, 0, stepover); //follow char matchRegExpHelper(w, inWild, matchSet, out, level, pos+1, stepover);//check next path } } Error Message: +str "Attempt to access index 1 in a vector of size 1." std::basic_string<char,std::char_traits<char>,std::allocator<char> > +err {msg="Attempt to access index 1 in a vector of size 1." } ErrorException Note: this function works fine for hundreds of test strings with '*' wilds if the extra stepover gate is not used Semi-Solved: I place a pos < w->alpha.size() condition on each path that calls w->alpha[pos]... - this prevented the backtrack calls from attempting to access the vector with an out of bounds index value. Still have other issues to work out - it loops infinitely adding the ? and backtracking to remove it, then repeat. But, moving forward now. Revised question: why during backtracking is the position index accumulating and/or not deincrementing - so at somepoint it calls w->alpha[pos]... with an invalid position that is either remaining from the next node or somehow incremented pos+1 when passing upward?

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• im writing a spellchecking program, how do i replace ch in a string..eg..

  - by Ajay Hopkins

  what am i doing wrong/what can i do?? import sys import string def remove(file): punctuation = string.punctuation for ch in file: if len(ch) > 1: print('error - ch is larger than 1 --| {0} |--'.format(ch)) if ch in punctuation: ch = ' ' return ch else: return ch ref = (open("ref.txt","r")) test_file = (open("test.txt", "r")) dictionary = ref.read().split() file = test_file.read().lower() file = remove(file) print(file) p.s, this is in Python 3.1.2

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• Converting an int to a binary string representation in Java?

  - by ttreat31

  What would be the best way (ideally, simplest) to convert an int to a binary string representation in Java? For example, say the int is 156. The binary string representation of this would be "10011100".

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• When does the difference between a string and a number matter in Perl 5?

  - by Chas. Owens

  If a string in Perl 5 passes looks_like_number, it might as well be a number. For instance, my $s = "10" + 5; results in $s being assigned 15. Are there any cases where a string does not behave like it's numeric equivalent would have?

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• In Android OS or Java, what's the difference between a character sequence and a string????

  - by K-RAN

  For the API (Android SDK API version 8) functions whose definitions list character sequence parameters, I can feed the function String instead. Best part is that they work the same way, no hassle, no warnings. Is there a difference between the two types? And more importantly, is there an inherent danger if I send the function a String instead of a character sequence??? Thanks for any clarifications!!! :D

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• C# is there a simple to know if my connection string is encrypt or not?

  - by 5YrsLaterDBA

  I want to know if my connection string is encrypted or not. I don't want to encrypt it again and again. This is only an issue in development stage. Any way to check the status of the connection string in App.config?

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• String replacement on a whole text file in Python 3.x?

  - by SkippyFire

  How can I replace a string with another string, within a given text file. Do I just loop through readline() and run the replacement while saving out to a new file? Or is there a better way? I'm thinking that I could read the whole thing into memory, but I'm looking for a more elegant solution... Thanks in advance

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• How to convert a string of ints Eg 45 34 21 22 into int's and store them in an array ? in C programm

  - by Srinivasa Varadan

  Hi , I have a string val = "14 22 33 48"; int matrix[5]; I need to insert each of the values in the string into the respective location in the array Eg: matrix[0] = 14; matrix[1] = 22; matrix[2] = 33; matrix[3] = 48; How do I do this ?

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• C: How to convert a string of ints into actual ints and store them in an array?

  - by Srinivasa Varadan

  I have a string "14 22 33 48". I need to insert each of the values in the string into the respective location in the array: int matrix[5]; so that matrix[0] = 14; matrix[1] = 22; matrix[2] = 33; matrix[3] = 48; How do I do this?

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• How to make a valid string for XML in JavaScript?

  - by MartyIX

  I'm looking for a function to convert a string to the xml string with xml entities where needed. Something like htmlentities in PHP but for XML and in Javascript. Thank you for any help!

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• Sorting mysql array value after string chars swapped from fetched DB data.

  - by Shail Patel

  I want to sort one column fetched from mysql DB, and stored in an array. After fetching I am doing below steps. 1- DB Fetching fields array in row format. ->Field1, Field2, Field3, Field4, Field5 2- From that fields array One columns data [Field3], swapping string keywords. eg. AB013, DB131, RS001 to->013AB, 131DB, 001RS Now I want to sort above value in new string format like-> 001RS, 013AB, 131DB

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• How to check if String value is Boolean type in Java?

  - by Ragnar

  I did a little search on this but couldn't find anything useful. The point being that if String value is either "true" or "false" the return value should be true. In every other value it should be false. I tried these: String value = "false"; System.out.println("test1: " + Boolean.parseBoolean(value)); System.out.println("test2: " + Boolean.valueOf(value)); System.out.println("test3: " + Boolean.getBoolean(value)); All functions returned false :(

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• C# How do I split a string by strings and include the delimiters?

  - by mafutrct

  There are many similar questions, but apparently no perfect match, that's why I'm asking. I'd like to split a random string (e.g. 123xx456yy789) by a list of string delimiters (e.g. xx, yy) and include the delimiters in the result (here: 123, xx, 456, yy, 789). Good performance is a nice bonus. Regex should be avoided, if possible.

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• In Java, is there a way to write a string literal without having to escape quotes?

  - by Matthew

  Say you have a String literal with a lot of quotation marks inside it. You could escape them all, but it's a pain, and difficult to read. In some languages, you can just do this: foo = '"Hello, World"'; In Java, however, '' is used for chars, so you can't use it for Strings this way. Some languages have syntax to work around this. For example, in python, you can do this: """A pretty "convenient" string""" Does Java have anything similar?

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• How to get a char* pointer to a C++ string?

  - by cambr

  I have a C++ string. I need to pass this string to a function accepting char* parameter, for example - strchr(). a) How do I get that pointer? b) Is there some funtion equivalent to strschr() that works for C++ strings?

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• Please give me an example where strings are usefull than string builder

  - by DJay

  Lot of questions has been already asked about the differences between string and string builder and most of the people suggest that string builder is faster than string. I am curious to know if string builder is too good so why string is there? Moreover, can some body give me an example where string will be more usefull than string builder?

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• What classes do you use to make string templates?

  - by EugeneP

  What classes do you use to make string placeholders work? String template = "You have %1 tickets for %d", Brr object = new Brr(template, {new Integer(1), new Date()}); object.print();

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• How do I split a string by strings and include the delimiters using .NET?

  - by mafutrct

  There are many similar questions, but apparently no perfect match, that's why I'm asking. I'd like to split a random string (e.g. 123xx456yy789) by a list of string delimiters (e.g. xx, yy) and include the delimiters in the result (here: 123, xx, 456, yy, 789). Good performance is a nice bonus. Regex should be avoided, if possible.

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• How to find if string contains letters and spaces (php)?

  - by Ole Jak

  So I need to get value false or true if string contains not only letters of all european and east alphabets and " "(space) and "-" minus. How to do such thing with some $a string?

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• why the String class in java does not implement Iterable?

  - by xyzzyz

  Hey, many builtin classes in Java implement Iterable, however String does not. It makes sense to iterate over chars in the String, just as one can iterate over items in regular array. Is there a reason behind it?

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• Vim: Fuzzy file search comparable to Sublime Text 2's?

  - by Jed

  I've tried FuzzyFinder, Command-T, and Ctrl-P (which is my finder of choice right now), but none hold a candle to Sublime Text 2. For example, I want to type: Head.php and have it find, among others: app/code/core/Mage/Page/Block/Html/Head.php Currently in Ctrl-P, which has otherwise served me better than Command-T, searching for Head.php gives me these first: downloader/lib/Mage/Connect/Command/Config_Header.php app/code/local/Namespace/Modals/Helper/Reader.php app/code/core/Mage/XMLConnect/Helper/Ipad.php My file is nowhere to be found (and I've never opened any of the above files), so I have to type this instead: pagehtmlhead.php Is there any utility that does smarter scoring/matching?

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• Module Adminhtml blocks not loading

  - by David Tay

  I was working on a Magento module and it was working fine. At some point, I was trying to enable WYSIWYG in an edit form 'content' field and suddenly, my adminhtml grid and edit blocks stopped being generated. On my system are TinyMCE and Fontis FCKEditor WYSIWYG editors extensions. I'm not sure what I did wrong but my adminhtml blocks will no longer generate. Here's a dump of all the blocks from my module's adminhtml layout: array(17) { [0]=> string(4) "root" [1]=> string(4) "head" [2]=> string(13) "head.calendar" [3]=> string(14) "global_notices" [4]=> string(6) "header" [5]=> string(4) "menu" [6]=> string(11) "breadcrumbs" [7]=> string(7) "formkey" [8]=> string(12) "js_translate" [9]=> string(4) "left" [10]=> string(7) "content" [11]=> string(8) "messages" [12]=> string(2) "js" [13]=> string(6) "footer" [14]=> string(8) "profiler" [15]=> string(15) "before_body_end" [16]=> string(7) "wysiwyg" } As you can see, the last item is "wysiwyg" but on the layout output of other magento modules, there are more blocks. For example, on MathieuF's calendar extension, these are all the layout blocks: array(26) { [0]=> string(4) "root" [1]=> string(4) "head" [2]=> string(13) "head.calendar" [3]=> string(14) "global_notices" [4]=> string(6) "header" [5]=> string(4) "menu" [6]=> string(11) "breadcrumbs" [7]=> string(7) "formkey" [8]=> string(12) "js_translate" [9]=> string(4) "left" [10]=> string(7) "content" [11]=> string(8) "messages" [12]=> string(2) "js" [13]=> string(6) "footer" [14]=> string(8) "profiler" [15]=> string(15) "before_body_end" [16]=> string(7) "wysiwyg" [17]=> string(27) "adminhtml_event.grid.child0" [18]=> string(12) "ANONYMOUS_19" [19]=> string(27) "adminhtml_event.grid.child1" [20]=> string(12) "ANONYMOUS_21" [21]=> string(27) "adminhtml_event.grid.child2" [22]=> string(20) "adminhtml_event.grid" [23]=> string(12) "ANONYMOUS_24" [24]=> string(19) "ANONYMOUS_17.child1" [25]=> string(14) "content.child0" } Does anyone have any idea what's wrong? I've already tried Alan Storm's Layout and Config Viewers and cannot find any clues as to what I did wrong. Any help would be greatly appreciated.

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• Powershell variables to string

  - by Mike Koerner

  I'm new to powershell. I'm trying to write an error handler to wrap around my script.  Part of the error handler is dumping out some variable settings.  I spent a while trying to do this and couldn't google a complete solution so I thought I'd post something. I want to display the $myinvocation variable. In powershell you can do this PS C:\> $myInvocation for my purpose I want to create a stringbuilder object and append the $myinvocation info.  I tried this $sbOut = new-object System.Text.Stringbuilder $sbOut.appendLine($myinvocation) $sbOut.ToString() This produces                                    Capacity                                MaxCapacity                                     Length                                    --------                                -----------                                     ------                                          86                                 2147483647                                         45 System.Management.Automation.InvocationInfo This is not what I wanted so I tried $sbOut.appendLine(($myinvocation|format-list *)) This produced                                    Capacity                                MaxCapacity                                     Length                                    --------                                -----------                                     ------                                         606                                 2147483647                                        305 Microsoft.PowerShell.Commands.Internal.Format.FormatStartData Microsoft.PowerShell.Commands.Internal.Format.GroupStartData Micros oft.PowerShell.Commands.Internal.Format.FormatEntryData Microsoft.PowerShell.Commands.Internal.Format.GroupEndData Microsoft.Powe rShell.Commands.Internal.Format.FormatEndData Finally I figured out how to produce what I wanted: $sbOut = new-object System.Text.Stringbuilder [void]$sbOut.appendLine(($myinvocation|out-string)) $sbOut.ToString() MyCommand        : $sbOut = new-object System.Text.Stringbuilder                                    [void]$sbOut.appendLine(($myinvocation|out-string))                                      $sbOut.ToString()                    BoundParameters  : {} UnboundArguments : {} ScriptLineNumber : 0 OffsetInLine     : 0 HistoryId        : 13 ScriptName       : Line             : PositionMessage  : InvocationName   : PipelineLength   : 2 PipelinePosition : 1 ExpectingInput   : False CommandOrigin    : Runspace Note the [void] in front of the stringbuilder variable doesn't show the Capacity,MaxCapacity of the stringbuilder object.  The pipe to out-string makes the output a string. It's not pretty but it works.

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• Find non-ascii characters from a UTF-8 string

  - by user10607

  I need to find the non-ASCII characters from a UTF-8 string. my understanding: UTF-8 is a superset of character encoding in which 0-127 are ascii characters. So if in a UTF-8 string , a characters value is Not between 0-127, then it is not a ascii character , right? Please correct me if i'm wrong here. On the above understanding i have written following code in C : Note: I'm using the Ubuntu gcc compiler to run C code utf-string is xvab c long i; char arr[] = "xvab c"; printf("length : %lu \n", sizeof(arr)); for(i=0; i<sizeof(arr); i++){ char ch = arr[i]; if (isascii(ch)) printf("Ascii character %c\n", ch); else printf("Not ascii character %c\n", ch); } Which prints the output like: length : 9 Ascii character x Not ascii character Not ascii character ? Not ascii character ? Ascii character a Ascii character b Ascii character Ascii character c Ascii character To naked eye length of xvab c seems to be 6, but in code it is coming as 9 ? Correct answer for the xvab c is 1 ...i.e it has only 1 non-ascii character , but in above output it is coming as 3 (times Not ascii character). How can i find the non-ascii character from UTF-8 string, correctly. Please guide on the subject.

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