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  • How can I programmatically tell if a caught IOException is because the file is being used by another

    - by Paul K
    When I open a file, I want to know if it is being used by another process so I can perform special handling; any other IOException I will bubble up. An IOException's Message property contains "The process cannot access the file 'foo' because it is being used by another process.", but this is unsuitable for programmatic detection. What is the safest, most robust way to detect a file being used by another process?

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  • How to get strptime to raise ArgumentError with garbage trailing characters

    - by Matt Briggs
    We have to handle user specified date formats in our application. We decided to go with Date.strptime for parsing and validation, which works great, except for how it just ignores any garbage data entered. Here is an irb session demonstrating the issue ree-1.8.7-2010.01 > require 'date' => true ree-1.8.7-2010.01 > d = Date.strptime '2001-01-01failfailfail', '%Y-%m-%d' => #<Date: 4903821/2,0,2299161> ree-1.8.7-2010.01 > d.to_s => "2001-01-01" what we would like, is behavior more like this ree-1.8.7-2010.01 > d = Date.strptime '2001failfailfail-01-01', '%Y-%m-%d' ArgumentError: invalid date Any suggestions would be appreciated

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  • Glob function (c) and backup file (file~)

    - by arnoras
    I'm using glob function for a autocompletion function. I'm showing you the problem because it's difficult to explain: matched = ~/.tcsh glob(matched, 0, NULL, &pglob); glob put all matched files in a char ** and when I print it I have: case[0] = .tcshrc case[1] = I should have .tcshrc~ in case[1], but nothing =S, I've seen a flag "GLOB_TILDE" like this " glob(matched, GLOB_TILDE, NULL, &pglob); But it doesn't change anything! Can someone help me?

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  • Solving a math problem/expression, which is a string, in PHP

    - by Koning WWWWWWWWWWWWWWWWWWWWWWW
    The user can enter a math problem (expression) like 5 + 654, 6 ^ 24, 2!, sqrt(543), log(54), sin 5, sin(50). After some reformatting (e.g. change sin 5 into sin(5)), and doing an eval, PHP gives me the right result: $problem = "5 + 5324"; eval("$result = " . $problem); echo $problem . " = " . $result; However, this is quite unsafe: /* If you read this, please, plz don't be stupid and DO NOT EXECUTE this code!!!!! */ $problem = "shell_exec('rm -rf /')"; eval("$result = " . $problem); /* Nukes system */ echo $problem . " = " . $result; Can anyone point me in the right direction parsing and solving a math question like the examples above, which is safe? Thanks.

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  • Advanced control of recursive parser in scala

    - by Jeriho
    val uninterestingthings = ".".r val parser = "(?ui)(regexvalue)".r | (uninterestingthings~>parser) This recursive parser will try to parse "(?ui)(regexvalue)".r until the end of input. Is in scala a way to prohibit parsing when some defined number of characters were consumed by "uninterestingthings" ? UPD: I have one poor solution: object NonRecursiveParser extends RegexParsers with PackratParsers{ var max = -1 val maxInput2Consume = 25 def uninteresting:Regex ={ if(max<maxInput2Consume){ max+=1 ("."+"{0,"+max.toString+"}").r }else{ throw new Exception("I am tired") } } lazy val value = "itt".r def parser:Parser[Any] = (uninteresting~>value)|parser def parseQuery(input:String) = { try{ parse(parser, input) }catch{ case e:Exception => } } } Disadvantages: - not all members are lazy vals so PackratParser will have some time penalty - constructing regexps on every "uninteresting" method call - time penalty - using exception to control program - code style and time penalty

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  • Joomla template parameters and params.ini - file becomes unwritable after save.

    - by Moak
    I am using wamp and creating a Joomla template with changeable parameters. initially the message is The parameter file \templates\ssc_2010\params.ini is writable! once I make changes everything works as expected, except now i get the message: The parameter file \templates\ssc_2010\params.ini is unwritable! One solution is to brows to the directory, right click the file, select properties, and uncheck read-only. Again the file is writable but once I modify the parameters again it becomes read only again. I'm quite lazy and would like to prevent this from happening again, I've notice this happening in past projects, but now I have to work a lot with parameters so it becomes quite boring doing manual labor like that :P

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  • Most Lite-Weight XML Parser with XPath and Wide-char Support

    - by Mystagogue
    I want a lite-weight C++ XML parser/DOM that: Can take UTF-8 as input, and parse into UTF-16. Maybe it does this directly (ideal!), or perhaps it provides a hook for the conversion (such as taking a custom stream object that does the conversion before parsing). Offers some XPath support. I've been looking at RapidXML, the Kranf xmlParser, and pugiXML. The first two of those might permit requirement #1 by way of a hook. The third, pugiXML, supports the #2 requirement. But none of those three fulfill both requirements. What is the smallest (free) library that can handle both requirements?

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  • Disable automatic Date parsing in HtmlUnit

    - by submonoid
    Having just upgraded to a newer version of HtmlUnit (2.4), I've noticed certain tests are failing when comparing the output of asText. Looking into the differences, this is because dates (present on the page in the format 11/06/2010 00:00z) are being altered in the output to read 2010-06-11. Has anybody else encountered this, and can anybody advise how to turn off this (seemingly undocumented) feature of asText, which seems to go completely against the advised documentation.

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  • How to use C to write to flash drive bootsector despite error 'Failed to open file to write.:Permiss

    - by updateraj
    My goal is to manipulate the boot-sector in my flashdrive (volume E:) I am using XP. I am able to read the boot-sector FILE *fp_read = fopen("\\\\.\\E:", "rb"); /* Able to proceed to read boot sector */ however i am not able to open the file to write using fopen in 'wb' mode. FILE *fp_read = fopen("\\\\.\\E:", "wb"); /* Unable to proceed due to Failed to open file to write.:Permission Denied */ The flash-drive is not in use at the moment of execution. Hex-editors are able to manipulated boot sector etc, i believe it possible to do so in c. Any suggestion or insight to overcome the access problem so as to be able to write?

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  • Undefined variable error when parsing json

    - by Ben Shelock
    I'm trying to parse the json grabbed from here. Basically what I do is iterate over the items, sort them, then display them. But I get an error saying data.data.children[i] is undefined. I can't think why it's doing it though? var json = 'http://www.reddit.com/reddits/mine/.json'; GM_xmlhttpRequest({ method: "GET", url: json, onload: reddits }); function reddits(response){ var txt = response.responseText; var data; var suggested = document.getElementById('suggested-reddits'); if(window.JSON && JSON.parse){ data = JSON.parse(txt); } else{ data = eval("("+txt+")"); } suggested.innerHTML += '<span>reddits you\'re subscribed to </span> <ul id="rsub"></ul>'; GM_addStyle('#rsub{width: 500px;}'); var reddits = new Array(); var rsub = document.getElementById('rsub'); for(i = 0; i <= data.data.children.length; i++){ var r = data.data.children[i].data.display_name; reddits.push(r); } sort(reddits); for(i = 0; i <= reddits.length; i++){ rsub.innerHTML += '<li><a href="#" onclick="set_sr_name(this); return false">' + reddits[i] + '</a></li>'; } }

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  • Java - Parsing a Date from a String

    - by Yatendra Goel
    I want to parse a java.util.Date from a String. I tried the following code but got unexpected output: Date getDate() { Date date = null; SimpleDateFormat sdf = new SimpleDateFormat("EEE MMM dd"); try { date = sdf.parse("Sat May 11"); } catch (ParseException ex) { Logger.getLogger(URLExtractor.class.getName()).log(Level.SEVERE, null, ex); return null; } return date; } When I run the above code, I got the following output: Mon May 11 00:00:00 IST 1970

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  • Strange Syntax Parsing Error in Python?

    - by user213060
    Am I missing something here? Why shouldn't the code under the "Broken" section work? I'm using Python 2.6. #!/usr/bin/env python def func(a,b,c): print a,b,c #Working: p={'c':3} func(1, b=2, c=3, ) #Working: func(1, b=2, **p,) #Broken: func(1, b=2, **p, )

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  • Parsing JSON with GSON

    - by Donn Felker
    I'm having some trouble with GSON, mainly deserializing from JSON to a POJO. I have the following JSON: { "events": [ { "event": { "id": 628374485, "title": "Developing for the Windows Phone" } }, { "event": { "id": 765432, "title": "Film Makers Meeting" } } ] } With the following POJO's ... public class EventSearchResult { private List<EventSearchEvent> events; public List<EventSearchEvent> getEvents() { return events; } } public class EventSearchEvent { private int id; private String title; public int getId() { return id; } public String getTitle() { return title; } } ... and I'm deserializing with the following code, where json input is the json above Gson gson = new Gson(); return gson.fromJson(jsonInput, EventSearchResult.class); However, I cannot get the list of events to populate correctly. The title and id are always null. I'm sure I'm missing something, but I'm not sure what. Any idea? Thanks

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  • PowerShell locking File....

    - by Ben
    I am trying to do something very simple in powershell Reading the contents of a file Manipulation some string Saving the modified test back to the file function Replace { $file = Get-Content C:\Path\File.cs $file | foreach {$_ -replace "document.getElementById", "$"} |out-file -filepath C:\Path\File.cs } I have tried Set-Content as well. I always get unautorized exception. I can see the $file has the file content, error is coming while writing the file. Any help is appreciated. Ben

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  • HTML5 Shiv not parsing quick enough

    - by Mikey Hogarth
    One of our web designers is working on a site at the moment and is using HTML5 elements, which she styles up in older browsers using the well documented Html5Shiv; http://css-tricks.com/html5-innershiv/ She reported some pretty weird behavior today and it looks like this is the cause. Initially it was very confusing, and went something along the lines of; "The page looks fine, I refresh it looks fine, refresh several times and occasionally it will not apply my styles to the HTML5 elements" Current best theory is that the shiv is not kicking in quick enough, and the page loads before the new elements have been registered. I was wondering if anyone could suggest a surefire way of including the shiv and making sure it's loaded and been parsed BEFORE the rest of the elements, so they will definitely get styled. EDIT (more info) Shiv is being included in the head, directly below the title/meta tags; <!--[if IE]> <script type="text/javascript" src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script> <![endif]--> The bit that is being styled is in the footer and is cross-site. Many of the pages will change in size as they're being powered by a CMS that our marketing team will use so I am unable to give an exact page size. All I would say is that if page size is an issue and there is no workaround, can someone let me know as this will mean we basically can't use HTML5 on this project (or at the very least we'll need to add superflous markup such as divs to ensure that the layout doesn't go crazy) EDIT 2 There is no chance of me posting the code unfortunately - it's only re-creatable under really obscure circumstances and the project is marked "top secret" at the moment :( If nobody knows then I'm guessing it's either a case of "everyone knows it happens but kinda ignores it" or just that it's something else other than the shiv.

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  • Parsing WordPress XML, slash:comments syntax?

    - by user313653
    This is really just a syntax question. I have a PHP script that parses my WordPress feed and returns the latest posts. I also want my script to parse the # of comments, but the WordPress feed XML object for number of comments has a colon in it (slash:comments). It causes the following error: Parse error: syntax error, unexpected ':' in ... on line ... I have tried each of the following without luck: $xml->slash:comments $comments = 'slash:comments' $xml->$comments $xml->slash.':'.comments $xml->{slash:comments} $xml->{'slash:comments'} How do I parse an object with a colon?

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  • Parsing a list of dictionaries passed as a POST parameter

    - by andyashton
    I have a list of python dictionaries that look like this: sandwiches = [ {'bread':'wheat', 'topping':'tomatoes', 'meat':'bacon'}, {'bread':'white', 'topping':'peanut butter', 'meat':'bacon'}, {'bread':'sourdough', 'topping':'cheese', 'meat':'bacon'} ] I want to pass this as a POST parameter to another Django app. What does the client app need to do to iterate through the list? I want to do something like: for sandwich in request.POST['sandwiches']: print "%s on %s with %s is yummy!" % (sandwich['meat'], sandwich['bread'], sandwich['topping']) But I don't seem to have a list of dicts when my data arrives at my client app.

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  • How can I allow undefined options when parsing args with Getopt

    - by Ross Rogers
    If I have a command line like: my_script.pl -foo -WHATEVER My script knows about --foo, and I want Getopt to set variable $opt_foo, but I don't know anything about -WHATEVER. How can I tell Getopt to parse out the options that I've told it about, and then get the rest of the arguments in a string variable or a list. An example: use strict; use warnings; use Getopt::Long; my $foo; GetOptions('foo' => \$foo); print 'remaining options: ', @ARGV; Then, issuing perl getopttest.pl -foo -WHATEVER gives Unknown option: whatever remaining options:

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  • Prevent DTD download when parsing XML, redux

    - by harpo
    I have a folder full of XHTML files, and a console program to process them. The problem is, it doesn't work when I'm offline, because The remote name could not be resolved: 'www.w3.org' A number of sites, including this one, say to set the XmlResolver to null. That is not not working. I have tried setting the XmlResolver to null every way that I can think of: in the XmlDocument, in XmlTextReader, and in the XmlReaderSettings. I believe that it's just creating a default instance. I have also tried implementing my own XmlResolver, but I don't know what to return for external items. public class NonXmlResolver : XmlUrlResolver { public override object GetEntity( Uri absoluteUri, string role, Type ofObjectToReturn ) { if ( absoluteUri.Scheme == "http" ) throw new Exception("What you talking 'bout, Willis?"); else return base.GetEntity( absoluteUri, role, ofObjectToReturn ); } } The documents do not use any special entities, only pure XML. This is possible, right?

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  • Online Image Slideshow Question. File Access Problems.

    - by msandbot
    Hi, I have a flash .swf file that I embed on my webpage. On my server I have the .swf file and multiple image folders. I would like to load every file in one of those folders into the flash slideshow. How should I go about doing this? I tried used Air but it doesn't work on my system as an application so I doubt it will work online. Eventually I plan on making a menu where you can select different folders to display and since they are of different sizes, a foreach loop would be optimal. Keeping a txt file with the number of images is also possible if theres a way to read that in, but I would prefer the more dynamic approach. I am working towards using php for the website if that helps find a solution. Thanks, -Mike Also my slideshow works great online currently but i have to hardcode in the number of files.

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  • string parsing occurrence in c

    - by Dan74
    I have a string as const char *str = "Hello, this is an example of my string"; How could I get everything after the first comma. So for this instance: this is an example of my string I was planing to do something like: // pseudocode char *a, *b; loop { if((a = strchr(l, ',')) == NULL) break; b++; // but not sure here } printf("%s",a); Thanks

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