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sarahfoxnz
Smarty Regular
Joined: 11 Apr 2010
Posts: 76
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 Posted: Mon Feb 15, 2016 9:40 am Post subject: Foreach - Do something when value changes ?? |
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Hello.
frequently, i want to do a foreach / loop of an array & display the information on the screen.
I currenty use ASSIGN to
a) get one of the values & assign it to a temporary value
b) compare the temporary value to the OLD temporary value (2 separate values).
if it changes - then do something (display extra HTML), and then assign 'old' temporary value with the new / current temporary value.
Ie - i have 2-4 rows of data within the same 'group', & when the group changes, I display a new heading etc....
this will usually be 5-10 lines of Smarty code do do the assigning/comparing
I was wondering if there was a faster way with a single built-in functionto do this.
"Compare this value with the previous value, if it has changed - do something"
(or if it has NOT changed - do something). |
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CrazyTemplate
Smarty Rookie
Joined: 12 Sep 2011
Posts: 31
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| Posted: Mon Feb 15, 2016 2:36 pm Post subject: |
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So you currently have something like this?
| Code: |
{foreach $VAR as $V}
{if $V != $PREVIOUS}
do something
{else}
do something else
{/if}
{/foreach}
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I'm not sure there is much else that you can do to optimize the above, unless the values somehow can be compared before being passed to Smarty. |
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AnrDaemon
Administrator
Joined: 03 Dec 2012
Posts: 1785
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| Posted: Mon Feb 15, 2016 5:42 pm Post subject: |
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I'm leaning to the "you're doing it wrong" side.
Remove business logic from template. |
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sarahfoxnz
Smarty Regular
Joined: 11 Apr 2010
Posts: 76
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| Posted: Tue Feb 16, 2016 8:57 am Post subject: |
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| CrazyTemplate wrote: | So you currently have something like this?
[code]
{foreach $VAR as $V}
{if $V != $PREVIOUS}
do something
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Yes i've got something like that..
it works - Though its a bit messy (extra Smarty code that )..
I'm sure in future there can be a built-in function - to put headers etc in-between where arrays change their values... |
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sarahfoxnz
Smarty Regular
Joined: 11 Apr 2010
Posts: 76
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| Posted: Tue Feb 16, 2016 8:59 am Post subject: |
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| AnrDaemon wrote: | I'm leaning to the "you're doing it wrong" side.
Remove business logic from template. |
Normally yes..
Ive done a LOT of processing in my PHP script.. But the display side in the smarty template, i want to put headers etc,.. when the array changes its primary value (& loops through the sub-arrays)
EDIT: The way i'm doing it now - does work.. im just wondering if there is (or can be) a built-in function etc to save on coding...)
maybe in future - & if people do want it / it is beneficial |
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AnrDaemon
Administrator
Joined: 03 Dec 2012
Posts: 1785
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| Posted: Tue Feb 16, 2016 9:57 am Post subject: |
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Headers is a part of business logic.
End chapter, end book. (q) |
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