how can i check that an array element in coldfusion is not empty. I have the following code: I am using this code but it does not seem to work:
<cfif trim(replaceNoCase(ArrayTo
</Cfif>
VanitArray is the array
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I'm not sure if you mean the array is empty or an element in the array is empty, but both are easily checked.
<!--- makes sure the array is not empty --->
<cfif NOT ArrayIsEmpty(vanityArray)>
.........
</cfif>
<!--- making sure a particular element in the array is not empty --->
<cfset elementIndex = 1 /> <!--- this can be any value you want between 1 and ArrayLen(vanityArray) --->
<cfif Len(vanityArray[elementInd
......
</cfif>
anwarmir, the problem with your statement is that you are first converting it to a list...
<cfif trim(replaceNoCase(ArrayTo
Lists do not recognize empty elements. For example, if you have a list like this:
1,2,3,,5 CF says it has 4 elements, because it ignores the blank
So its hard to test a list for empty elements.
Your best bet is to leave it as an array and test the location is mkishline shows in his second example.
Sandy, testing if variables.temp isDefined() will always return TRUE because the variable is defined in your CFSET line. I think you may want to use a list function like listLen(), not sure where you were going.
@anwarmir,
To determine if a *specific* element is empty, use mkishline's suggestion. Though you may want to trim() to exclude whitespace.
<cfif Len(Trim(vanityArray[1])) GT 0>
....
</cfif>
To determine if ALL elements are empty you can use ListLen(). List functions do not count empty elements. So the list length will equal 0 if ALL of the elements are empty (or just whitespace)
<!--- convert array to list, remove all whitespace, then count list elements --->
<cfif listLen(reReplace(arrayToL
ALL elements are empty
<cfelse>
NOT EMPTY
</cfif>
To determine if AT LEAST 1 element is empty
<cfif listLen(arrayToList(vanity
At least 1 empty element found
<cfelse>
No empty elements found
</cfif>
... or ...
<cfif listLen(reReplace(arrayToL
At least 1 element contains all whitespace
<cfelse>
No elements contain all whitespace
</cfif>
when you have an array of data, its always better on performance to leave the object as an array, lists require additional processing. If you can handle everything as an array, forget about the lists...
although the examples by "_agx_" should work well too with a conversion to a list for a simple test.
if you have an array though another method(s) might be...
<cfset testArray = arrayNew(1)>
<cfset testArray[1] = "something">
<cfset testArray[2] = "something">
<cfset testArray[3] = "">
<cfset testArray[4] = "something">
<!--- method 1 --->
<cfloop from="1" to="#arrayLen(testArray)#"
<cfif not len(testArray[i])>
<!--- do something with the empty element --->
</cfif>
</cfloop>
<!--- method 2 (this one will stop looping once it finds an empty element, "quick check")--->
<cfset allElementsPopulated = true>
<cfloop from="1" to="#arrayLen(testArray)#"
<cfif not len(testArray[i])>
<cfset allElementsPopulated = false>
<cfbreak>
</cfif>
</cfloop>
-tb55
@_agx_
true, the example you posted wouldn't really affect performance, especially for smaller arrays. Actually the code you posted...
<cfif listLen(arrayToList(vanity
At least 1 empty element found
<cfelse>
No empty elements found
</cfif>
is a bit cleaner then looping over an array. Just wanted to throw the performance tip out there for something to keep in mind.
forgot the trim()... good catch... ;o)
-tb55
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by: sandy12879Posted on 2007-06-12 at 02:58:56ID: 19264731
<cfset variables.temp = trim(replaceNoCase(ArrayTo
<cfif isdefined("variables.temp"
blaha blaha.....
<cfelse>
blaha blaha.....
</cfif>
it shd work for you