Number of arguments passed to the count function
There are built-in functions that can count the number of arguments passed to a function? Obviously (arguments) StructCount doesn't work here because "the scope always contains an entry 'slot' for each argument declared, even if you do not pass the argument to the function.»Copy the following code always returns "Count = 3 '. I want to output 'Count = 1' because the only argument has been passed to the function. The functions of any integrated to do this or am I stuck do manually: a loop + structKeyExists?
< cfset comp = createObject ("component", "MyComp") >
< cfset comp.showArgs (id = 1) / >
<! - MyComp - >
< cfproperty >
< cffunction name = returntype "showArgs" = "Sub" output = "true" >
< name cfargument = "id" type = "numeric" required = "true" / >
< name cfargument = "FirstName" type = "string" required = "false" / >
< name cfargument = "name" type = "string" required = "false" / >
Count = < cfoutput > #StructCount (arguments) # < / cfoutput > < br >
< / cffunction >
< / cfproperty >
Thanks for the replies.
My question was not so much about how it works. I understand that CF always adds a slot in the structure of optional arguments. Maybe its just me, but it seems a bit logically inconsistent to return different results of StructCount (etc.) and StructKeyExists? If StructCount "counts the number of keys in a structure" then StructKeyExists should behave in accordance with the StructCount, but it doesn't. I understand why its done in this way, but it still seems a bit inconsistent.
In any case, because there isn't a built-in method to return only the arguments provided, I ended up doing manually as I've described before.
Tags: ColdFusion
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Need help with the analytic function
I want to get the highest employee details and the 2nd highest employee for a particular service. But also the Department should have more than 1 employee.
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Would what results you if there is a link for the 2nd highest salary in some Department? For example, if you add this line to your sample data:
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Hi guys, I have a problem with this section of code...
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}I don't see where you have a question from vars between functions because you do not pass everything. Maybe that's your problem. The function fileLoaded expects an argument, but you are not providing one. To get around that you should provide any argument being sent in the first function...
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I have a request to count the number of digital pulses. I want to know the time of impulses coming which start from 1 and an increase in later, 4 as 1, 5, 9, 13... The time interval between each pulse is not a fixed value. So I tried to use DAQmxRegisterEveryNSamplesEvent and DAQmxCreateCICountEdgesChan functions. But afterI calls the DAQmxStartTask function, it has always failed. The advice that I used is the NOR-PCIe-6320. Here's the part of my code.
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Yang
DAQmxRegisterEveryNSamplesEvent only works with the buffered in memory tasks. That's what you should do anyway (if you want to use the callback or not):
1. make your external signal the sample clock (DAQmxCfgSampClkTiming).
2. use one of the basics of internal time as the source (DAQmxSetCICountEdgesTerm).
Each sample you read will give the count in ticks of the time base. Multiply the number by the base of your time period and you now have a timestamp. Keep in mind the counter roll to 2 ^ 32 therefore account for this in your program.
The recall is not necessary, but it is useful that you can make sure that you block your main thread until the samples are available.
Best regards
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