Re: chain variable setting
A quick test indicates it's new in CF9. Worth mentioning that it is NOT treating the assignment as an expression, it is only allowing multiple variables to be assigned to a single expression. Your second test case would fail regardless of which one CF was doing, but this example also fails (meaning it's the latter): cfset c=(b=a+1)+1 You can also use assignments in loop conditions. I think Ben blogged about that last summer. cheers, barneyb On Mon, Mar 1, 2010 at 1:33 PM, Michael Dinowitz mdino...@houseoffusion.com wrote: I think that I missed this in the docs. It seems that you can chain set variables cfset a=1 cfset c=b=a+1 This will give you a=1, b=2, c=2. On a related note, the following will fail cfset a=1 cfset c=b+1=a+1 The chain works as long as there is no operation except on the right-most item in the chain. This is all expected behavior in some other languages but I've never seen it in CF. Anyone know when it was added? Please make me look like a fool for missing it. :) -- Michael Dinowitz -- Barney Boisvert bboisv...@gmail.com http://www.barneyb.com/ ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:331227 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
RE: chain variable setting
6.1 doesn't like it... Eric -Original Message- From: Michael Dinowitz [mailto:mdino...@houseoffusion.com] Sent: Monday, March 01, 2010 3:33 PM To: cf-talk Subject: chain variable setting I think that I missed this in the docs. It seems that you can chain set variables cfset a=1 cfset c=b=a+1 This will give you a=1, b=2, c=2. On a related note, the following will fail cfset a=1 cfset c=b+1=a+1 The chain works as long as there is no operation except on the right-most item in the chain. This is all expected behavior in some other languages but I've never seen it in CF. Anyone know when it was added? Please make me look like a fool for missing it. :) -- Michael Dinowitz ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:331228 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: chain variable setting
I've just run a regex against the cfdocs and I can't find any reference to this new chaining functionality. This implies it's a new and overlooked functionality. I wonder what else is un-noted. Assignments in loop conditions has been around for a while. If it's a CFLoop then you can only alter the loop operation with a condition. If it's a loop within a script, you can use assignments at any time. It allows for some 'silly' effects like this: CFSCRIPT For (i=M;i NEQ P; i=Chr(Asc(i)+1)) writeoutput(i' '); /CFSCRIPT On Mon, Mar 1, 2010 at 4:40 PM, Barney Boisvert bboisv...@gmail.com wrote: A quick test indicates it's new in CF9. Worth mentioning that it is NOT treating the assignment as an expression, it is only allowing multiple variables to be assigned to a single expression. Your second test case would fail regardless of which one CF was doing, but this example also fails (meaning it's the latter): cfset c=(b=a+1)+1 You can also use assignments in loop conditions. I think Ben blogged about that last summer. cheers, barneyb On Mon, Mar 1, 2010 at 1:33 PM, Michael Dinowitz mdino...@houseoffusion.com wrote: I think that I missed this in the docs. It seems that you can chain set variables cfset a=1 cfset c=b=a+1 This will give you a=1, b=2, c=2. On a related note, the following will fail cfset a=1 cfset c=b+1=a+1 The chain works as long as there is no operation except on the right-most item in the chain. This is all expected behavior in some other languages but I've never seen it in CF. Anyone know when it was added? Please make me look like a fool for missing it. :) -- Michael Dinowitz -- Barney Boisvert bboisv...@gmail.com http://www.barneyb.com/ ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:331229 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: chain variable setting
It was definitely added in CF9 but you are right, I don't see it listed in What's New in Coldfusion 9. Curious. This is the reference page for this particular functionality however: http://help.adobe.com/en_US/ColdFusion/9.0/Developing/WS328B9130-F922-4ddb-B78B-8817CA81F8E3.html Cheers, Judah On Mon, Mar 1, 2010 at 2:02 PM, Michael Dinowitz mdino...@houseoffusion.com wrote: I've just run a regex against the cfdocs and I can't find any reference to this new chaining functionality. This implies it's a new and overlooked functionality. I wonder what else is un-noted. Assignments in loop conditions has been around for a while. If it's a CFLoop then you can only alter the loop operation with a condition. If it's a loop within a script, you can use assignments at any time. It allows for some 'silly' effects like this: CFSCRIPT For (i=M;i NEQ P; i=Chr(Asc(i)+1)) writeoutput(i' '); /CFSCRIPT On Mon, Mar 1, 2010 at 4:40 PM, Barney Boisvert bboisv...@gmail.com wrote: A quick test indicates it's new in CF9. Worth mentioning that it is NOT treating the assignment as an expression, it is only allowing multiple variables to be assigned to a single expression. Your second test case would fail regardless of which one CF was doing, but this example also fails (meaning it's the latter): cfset c=(b=a+1)+1 You can also use assignments in loop conditions. I think Ben blogged about that last summer. cheers, barneyb On Mon, Mar 1, 2010 at 1:33 PM, Michael Dinowitz mdino...@houseoffusion.com wrote: I think that I missed this in the docs. It seems that you can chain set variables cfset a=1 cfset c=b=a+1 This will give you a=1, b=2, c=2. On a related note, the following will fail cfset a=1 cfset c=b+1=a+1 The chain works as long as there is no operation except on the right-most item in the chain. This is all expected behavior in some other languages but I've never seen it in CF. Anyone know when it was added? Please make me look like a fool for missing it. :) -- Michael Dinowitz -- Barney Boisvert bboisv...@gmail.com http://www.barneyb.com/ ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:331230 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: chain variable setting
Not only did I miss it, my regex didn't find it because it assumed a cfset. There are a few things not mentioned in the what's new section. This is only one of them. :( -- Michael Dinowitz On Mon, Mar 1, 2010 at 5:07 PM, Judah McAuley ju...@wiredotter.com wrote: It was definitely added in CF9 but you are right, I don't see it listed in What's New in Coldfusion 9. Curious. This is the reference page for this particular functionality however: http://help.adobe.com/en_US/ColdFusion/9.0/Developing/WS328B9130-F922-4ddb-B78B-8817CA81F8E3.html Cheers, Judah On Mon, Mar 1, 2010 at 2:02 PM, Michael Dinowitz mdino...@houseoffusion.com wrote: I've just run a regex against the cfdocs and I can't find any reference to this new chaining functionality. This implies it's a new and overlooked functionality. I wonder what else is un-noted. Assignments in loop conditions has been around for a while. If it's a CFLoop then you can only alter the loop operation with a condition. If it's a loop within a script, you can use assignments at any time. It allows for some 'silly' effects like this: CFSCRIPT For (i=M;i NEQ P; i=Chr(Asc(i)+1)) writeoutput(i' '); /CFSCRIPT On Mon, Mar 1, 2010 at 4:40 PM, Barney Boisvert bboisv...@gmail.com wrote: A quick test indicates it's new in CF9. Worth mentioning that it is NOT treating the assignment as an expression, it is only allowing multiple variables to be assigned to a single expression. Your second test case would fail regardless of which one CF was doing, but this example also fails (meaning it's the latter): cfset c=(b=a+1)+1 You can also use assignments in loop conditions. I think Ben blogged about that last summer. cheers, barneyb On Mon, Mar 1, 2010 at 1:33 PM, Michael Dinowitz mdino...@houseoffusion.com wrote: I think that I missed this in the docs. It seems that you can chain set variables cfset a=1 cfset c=b=a+1 This will give you a=1, b=2, c=2. On a related note, the following will fail cfset a=1 cfset c=b+1=a+1 The chain works as long as there is no operation except on the right-most item in the chain. This is all expected behavior in some other languages but I've never seen it in CF. Anyone know when it was added? Please make me look like a fool for missing it. :) -- Michael Dinowitz -- Barney Boisvert bboisv...@gmail.com http://www.barneyb.com/ ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:331231 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
