[flexcoders] Force binding for Arrays
I realize that we can force binding for Arrays to occur, when modifying one of their indexes by doing something like Model.myList = Model.myList Is there any performance reasons or other reasons why this would be a bad idea to use? TIA - superabe -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com YAHOO! GROUPS LINKS Visit your group "flexcoders" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [flexcoders] Force binding for Arrays
You don't need to do that; Array's in Flex already have the DataProvider API (in 1.5), and thus generate events. So, if you are changing an index, ensure you do: my_array.addItem(someItem) Instead of: my_array.push(someItem) If you do the addItem, it'll trigger the event, and update whatever controls is bound to the array. Only reset the array entirely if the whole array changes. - Original Message - From: superabe superabe To: flexcoders@yahoogroups.com Sent: Thursday, November 03, 2005 11:11 AM Subject: [flexcoders] Force binding for Arrays I realize that we can force binding for Arrays to occur, when modifying one of their indexes by doing something like Model.myList = Model.myList Is there any performance reasons or other reasons why this would be a bad idea to use? TIA - superabe -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com SPONSORED LINKS Web site design development Computer software development Software design and development Macromedia flex YAHOO! GROUPS LINKS Visit your group "flexcoders" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [flexcoders] Force binding for Arrays
ok...I do need to reset the array at times, and also to change an item in the index. Is there any perf hit by reassiging the variable to itself ? - superabe On 11/3/05, JesterXL [EMAIL PROTECTED] wrote: You don't need to do that; Array's in Flex already have the DataProvider API (in 1.5), and thus generate events. So, if you are changing an index, ensure you do: my_array.addItem(someItem) Instead of: my_array.push(someItem) If you do the addItem, it'll trigger the event, and update whatever controls is bound to the array. Only reset the array entirely if the whole array changes. - Original Message - From: superabe superabe To: flexcoders@yahoogroups.com Sent: Thursday, November 03, 2005 11:11 AM Subject: [flexcoders] Force binding for Arrays I realize that we can force binding for Arrays to occur, when modifying one of their indexes by doing something like Model.myList = Model.myList Is there any performance reasons or other reasons why this would be a bad idea to use? TIA - superabe--Flexcoders Mailing ListFAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txtSearch Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com SPONSORED LINKS Web site design development Computer software development Software design and development Macromedia flex YAHOO! GROUPS LINKS Visit your group flexcoders on the web. To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com SPONSORED LINKS Web site design development Software design and development Macromedia flex Software development best practice YAHOO! GROUPS LINKS Visit your group "flexcoders" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [flexcoders] Force binding for Arrays
Yep; you pretty much reset the entire component. However, most that I've seen don't necessarely do a reset vs. an array.removeAll() differently; you're just re-creating a few variables so go for it G! - Original Message - From: superabe superabe To: flexcoders@yahoogroups.com Sent: Thursday, November 03, 2005 8:28 PM Subject: Re: [flexcoders] Force binding for Arrays ok...I do need to reset the array at times, and also to change an item in the index. Is there any perf hit by reassiging the variable to itself ? - superabe On 11/3/05, JesterXL [EMAIL PROTECTED] wrote: You don't need to do that; Array's in Flex already have the DataProvider API (in 1.5), and thus generate events. So, if you are changing an index, ensure you do: my_array.addItem(someItem) Instead of: my_array.push(someItem) If you do the addItem, it'll trigger the event, and update whatever controls is bound to the array. Only reset the array entirely if the whole array changes. - Original Message - From: superabe superabe To: flexcoders@yahoogroups.com Sent: Thursday, November 03, 2005 11:11 AM Subject: [flexcoders] Force binding for Arrays I realize that we can force binding for Arrays to occur, when modifying one of their indexes by doing something like Model.myList = Model.myList Is there any performance reasons or other reasons why this would be a bad idea to use? TIA - superabe--Flexcoders Mailing ListFAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txtSearch Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com SPONSORED LINKS Web site design development Computer software development Software design and development Macromedia flex YAHOO! GROUPS LINKS Visit your group "flexcoders" on the web. To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com SPONSORED LINKS Web site design development Software design and development Macromedia flex Software development best practice YAHOO! GROUPS LINKS Visit your group "flexcoders" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
RE: [flexcoders] Force binding for Arrays
Its not the end of the world in Flex 1.5, it will not be a good idea in Flex 2 (but we provide new interfaces to make it even easier). It also depends what the binding destination is doing with the array. If its a DataGrid theres a lot more invalidating and redrawing that happens if you re-assign the whole array vs. just notifying it that one item changed. Repeater is even worse. Something that is just holding a reference, less of a big deal. My guess is that you are binding to something that does react to the array and therefore there is a performance impact in redrawing all the time. Matt From: flexcoders@yahoogroups.com [mailto:flexcoders@yahoogroups.com] On Behalf Of superabe superabe Sent: Thursday, November 03, 2005 5:28 PM To: flexcoders@yahoogroups.com Subject: Re: [flexcoders] Force binding for Arrays ok...I do need to reset the array at times, and also to change an item in the index. Is there any perf hit by reassiging the variable to itself ? - superabe On 11/3/05, JesterXL [EMAIL PROTECTED] wrote: You don't need to do that; Array's in Flex already have the DataProvider API (in 1.5), and thus generate events. So, if you are changing an index, ensure you do: my_array.addItem(someItem) Instead of: my_array.push(someItem) If you do the addItem, it'll trigger the event, and update whatever controls is bound to the array. Only reset the array entirely if the whole array changes. - Original Message - From: superabe superabe To: flexcoders@yahoogroups.com Sent: Thursday, November 03, 2005 11:11 AM Subject: [flexcoders] Force binding for Arrays I realize that we can force binding for Arrays to occur, when modifying one of their indexes by doing something like Model.myList = Model.myList Is there any performance reasons or other reasons why this would be a bad idea to use? TIA - superabe -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com SPONSORED LINKS Web site design development Computer software development Software design and development Macromedia flex YAHOO! GROUPS LINKS Visit your group flexcoders on the web. To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com YAHOO! GROUPS LINKS Visit your group "flexcoders" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
