Worth noting is that take caution when applying multiple "flag operations" in the same line of code. The below example of "flags | C & ~B" really translates to "flags | (C & ~B)" which will give the wrong result. Just use the good old parenthese to be safe.
Chad On Tue, 29 Jun 2004 07:41:40 +0300, Stoyan Damov <[EMAIL PROTECTED]> wrote: >No, you couldn't. If you have set the flags *in runtime* to A | B and you >want to "add" (set also) C, but "remove" (clear) B, you should either know >which flags were set previously or just type "flags | C & ~B". > >Cheers, >Stoyan > >-----Original Message----- >From: Unmoderated discussion of advanced .NET topics. >[mailto:[EMAIL PROTECTED] On Behalf Of William >Bartholomew >Sent: Tuesday, June 29, 2004 02:25 >To: [EMAIL PROTECTED] >Subject: Re: [ADVANCED-DOTNET] bits of an integer > >Could you not use an enumeration with the Flags attribute and avoid all >of the casting to int? > >Regards, > >William D. Bartholomew >http://blog.bartholomew.id.au/ > > >JJ hughes wrote: >> i ended up setting the bit back like this >> what I needed to do was set 4 bits in a integer (1,2,4,8) these bits >> represented boolean values >> So I set them via check boxes on a web form and change the value in the >bit >> if it evaluates to false >> >> if(value){this.modality |= (int)Modalities.OnLine;} >> else{this.modality &= ~((int)Modalities.OnLine);} >> >> Thank you, >> >> Jeff Hughes >> Spider Web Development LLC >> 480-215-9493 >> [EMAIL PROTECTED] >> http://spiderwebdev.com >> >>>this.modality = this.modality | 1; will set the least significant bit >>> >>>-----Original Message----- >>>From: Unmoderated discussion of advanced .NET topics. >>>[mailto:[EMAIL PROTECTED] On Behalf Of jeff Hughes >>>Sent: Monday, June 28, 2004 2:03 PM >>>To: [EMAIL PROTECTED] >>>Subject: [ADVANCED-DOTNET] bits of an integer >>> >>>I am trying to set the bits of an integer value. I am able to get the bit >>>set like this >>> >>>if((someIntValue & 1) == 1) >>>{ >>> return true; >>>} >>> >>>so if the the first bit == 1 then I know that bit is set >>> >>>if I want to set the bit to one I get and execption >>> >>>trying this way I get "The left-hand side of an assignment must be a >>>vaiable, propery or indexer" >>> >>>(this.modality & 1) = 1; >>> >>>how do I set the bit of the integer? >>> >>>JJ >>> >>>=================================== >>>This list is hosted by DevelopMentorR http://www.develop.com Some .NET >>>courses you may be interested in: >>> >>>NEW! Guerrilla ASP.NET, 17 May 2004, in Los Angeles >>>http://www.develop.com/courses/gaspdotnetls >>> >>>View archives and manage your subscription(s) at >> >> http://discuss.develop.com >> >>>=================================== >>>This list is hosted by DevelopMentorR http://www.develop.com >>>Some .NET courses you may be interested in: >>> >>>NEW! Guerrilla ASP.NET, 17 May 2004, in Los Angeles >>>http://www.develop.com/courses/gaspdotnetls >>> >>>View archives and manage your subscription(s) at >> >> http://discuss.develop.com >> >> >> =================================== >> This list is hosted by DevelopMentorR http://www.develop.com >> Some .NET courses you may be interested in: >> >> NEW! Guerrilla ASP.NET, 17 May 2004, in Los Angeles >> http://www.develop.com/courses/gaspdotnetls >> >> View archives and manage your subscription(s) at >http://discuss.develop.com >> >> >> >> --- >> avast! Antivirus: Inbound message clean. >> Virus Database (VPS): 0426-1, 25/06/2004 >> Tested on: 29/06/2004 9:02:02 AM >> avast! - copyright (c) 2000-2004 ALWIL Software. >> http://www.avast.com >> >> >> >> > > >--- >avast! Antivirus: Outbound message clean. >Virus Database (VPS): 0426-1, 25/06/2004 >Tested on: 29/06/2004 9:24:56 AM >avast! - copyright (c) 2000-2004 ALWIL Software. >http://www.avast.com > >=================================== >This list is hosted by DevelopMentorR http://www.develop.com >Some .NET courses you may be interested in: > >NEW! Guerrilla ASP.NET, 17 May 2004, in Los Angeles >http://www.develop.com/courses/gaspdotnetls > >View archives and manage your subscription(s) at http://discuss.develop.com > >=================================== >This list is hosted by DevelopMentorŪ http://www.develop.com >Some .NET courses you may be interested in: > >NEW! Guerrilla ASP.NET, 17 May 2004, in Los Angeles >http://www.develop.com/courses/gaspdotnetls > >View archives and manage your subscription(s) at http://discuss.develop.com =================================== This list is hosted by DevelopMentorŪ http://www.develop.com Some .NET courses you may be interested in: NEW! Guerrilla ASP.NET, 17 May 2004, in Los Angeles http://www.develop.com/courses/gaspdotnetls View archives and manage your subscription(s) at http://discuss.develop.com
