Re: Hard code or portable code
Very good explanation . Thanks , hershrev On Thursday, March 11, 2004, at 01:31 AM, J. Landman Gay wrote: On Wednesday, March 10, 2004, at 04:09 PM, hershrev wrote: Can I please have a little understanding on the parameter part of functions what does it do or add? The following is kind of long, so apologies in advance. I wrote it for someone else a long time ago. The person I was writing to said he never used custom functions because he didn't know what they were. He asked me to explain. *** If Revolution does not have a built-in function to do something you want, you can write your own function to do it instead. Suppose we want to add two numbers together and get a total. (This is a very simple example, and really you would not need to do this because MC can add two numbers easily inside a script. But it makes a good example.) So we can write a function called addNumbers like this: function addNumbers num1,num2 put num1 + num2 into theTotal return theTotal end addNumbers The parameters num1 and num2 are like baskets that hold whatever values the original handler sends to the function. In this case, they each will contain a number. The special word return tells Revolution to send the variable theTotal back to the handler that asked for the information. So, this function takes two numbers that are passed to it in the parameters, adds them together, and sends back a total. Now we can write a handler that uses this function this way: on myHandler put 16 into theFirstNumber put 4 into theSecondNumber put addNumbers(theFirstNumber,theSecondNumber) into myTotal end myHandler This handler will send 16 and 4 to our custom function addNumbers. The addNumbers function will catch these two numbers in its parameters num1 and num2, then add them together, and send back 20. The script myHandler will receive that 20 and put it into the variable myTotal. So myTotal now equals 20. When you use a function in a handler, you must provide a place for its results to go -- a variable usually, or sometimes a field. For example, this will not work: addNumbers(theFirstNumber,theSecondNumber) because there is no place for the returned information to go. A handler that uses a function must provide a place to store the information that the function sends back. This is true of built-in Rev functions too. For example, this will not work: the date because there is no place for the date to be stored. You must provide a place: put the date into myDate A handler that uses a custom function must follow the same rule. It must provide a place for the returned information to be stored: put addNumbers(theFirstNumber,theSecondNumber) into myTotal Functions can be as short or as long as you want, and sometimes can be very complicated. But the basics are always the same: a handler asks a function to do some work and often sends some parameters to the function to tell it what to use for that work. The function does the work and returns the finished calculation to the original handler. The handler can use the finished calculation any way it wants, just as if it were any other variable. -- Jacqueline Landman Gay | [EMAIL PROTECTED] HyperActive Software | http://www.hyperactivesw.com ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Hard code or portable code
Can I please have a little understanding on the parameter part of functions what does it do or add? e.g. function latestField param1, param2 Thanks in advanced , hershrev On Thursday, March 4, 2004, at 01:51 PM, hershrev wrote: Yes , All hats up for you. function latestFields local myVar repeat with i=1 to (the number of flds) put fld i after myVar end repeat return myVar end latestFields an reuse the function and call if from various other places. HTH, Brian ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Hard code or portable code
On Wednesday, March 10, 2004, at 04:09 PM, hershrev wrote: Can I please have a little understanding on the parameter part of functions what does it do or add? Parameters are variables local to the function. When the function is used, the values specified with the use are put into the variables. An example (untested): function double x return x*2 end double on mouseUp put 1 into x put 2 into y put double(3) + double(x) + double(y+1) end mouseUp == 14 You can have more than one parameter. In use, they are separated by commas. This is not the same as the comma operator (usually). There are reference parameters, but that is more advanced. Dar Scott ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Hard code or portable code
On Wednesday, March 10, 2004, at 06:45 PM, Dar Scott wrote: On Wednesday, March 10, 2004, at 04:09 PM, hershrev wrote: Can I please have a little understanding on the parameter part of functions what does it do or add? Parameters are variables local to the function. When the function is used, the values specified with the use are put into the variables. An example (untested): function double x return x*2 end double on mouseUp put 1 into x put 2 into y put double(3) + double(x) + double(y+1) end mouseUp What should the result be on this ? == 14 You can have more than one parameter. In use, they are separated by commas. This is not the same as the comma operator (usually). There are reference parameters, but that is more advanced. Dar Scott ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Hard code or portable code
On Wednesday, March 10, 2004, at 05:30 PM, hershrev wrote: function double x return x*2 end double on mouseUp put 1 into x put 2 into y put double(3) + double(x) + double(y+1) end mouseUp What should the result be on this ? == 14 14 (Sorry about the cute notation.) The double(3) would evaluate to 6. The double(x) would take the local x in mouseUp (mouseUp can't see the one in double) and have that doubled. That would evaluate to 2. The double(y+1) would evaluate to the same as double(2+1) or double(3) or 6. And 6 + 2 + 6 evaluates to 14. Dar Scott ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Hard code or portable code
On Wednesday, March 10, 2004, at 04:09 PM, hershrev wrote: Can I please have a little understanding on the parameter part of functions what does it do or add? The following is kind of long, so apologies in advance. I wrote it for someone else a long time ago. The person I was writing to said he never used custom functions because he didn't know what they were. He asked me to explain. *** If Revolution does not have a built-in function to do something you want, you can write your own function to do it instead. Suppose we want to add two numbers together and get a total. (This is a very simple example, and really you would not need to do this because MC can add two numbers easily inside a script. But it makes a good example.) So we can write a function called addNumbers like this: function addNumbers num1,num2 put num1 + num2 into theTotal return theTotal end addNumbers The parameters num1 and num2 are like baskets that hold whatever values the original handler sends to the function. In this case, they each will contain a number. The special word return tells Revolution to send the variable theTotal back to the handler that asked for the information. So, this function takes two numbers that are passed to it in the parameters, adds them together, and sends back a total. Now we can write a handler that uses this function this way: on myHandler put 16 into theFirstNumber put 4 into theSecondNumber put addNumbers(theFirstNumber,theSecondNumber) into myTotal end myHandler This handler will send 16 and 4 to our custom function addNumbers. The addNumbers function will catch these two numbers in its parameters num1 and num2, then add them together, and send back 20. The script myHandler will receive that 20 and put it into the variable myTotal. So myTotal now equals 20. When you use a function in a handler, you must provide a place for its results to go -- a variable usually, or sometimes a field. For example, this will not work: addNumbers(theFirstNumber,theSecondNumber) because there is no place for the returned information to go. A handler that uses a function must provide a place to store the information that the function sends back. This is true of built-in Rev functions too. For example, this will not work: the date because there is no place for the date to be stored. You must provide a place: put the date into myDate A handler that uses a custom function must follow the same rule. It must provide a place for the returned information to be stored: put addNumbers(theFirstNumber,theSecondNumber) into myTotal Functions can be as short or as long as you want, and sometimes can be very complicated. But the basics are always the same: a handler asks a function to do some work and often sends some parameters to the function to tell it what to use for that work. The function does the work and returns the finished calculation to the original handler. The handler can use the finished calculation any way it wants, just as if it were any other variable. -- Jacqueline Landman Gay | [EMAIL PROTECTED] HyperActive Software | http://www.hyperactivesw.com ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Hard code or portable code
Ok its up and running was my mistake did replace completely , it was twice because it had all the info of all the fields plus the info from the field itself. thanks , hershrev On Thursday, March 4, 2004, at 02:46 AM, Brian Yennie wrote: Yes , All hats up for you. Just a question, why when I write ... put function () into field x it doesn't replace the old contents of the field ? Try this. Put the following in your stack script: function latestFields local myVar repeat with i=1 to (the number of flds) put fld i after myVar end repeat return myVar end latestFields Now in a button script, do this: on mouseUp put latestFields() into last fld end mouseUp The function by being in the stack script becomes available to you whenever you need it. You may want to adjust where it puts the results. Now to compare if I write on mouseUp repeat with x=1 to the number of flds put text of field x return after y end repeat put y into fld 1 end mouseUp what is the difference besides function or message, speed wise or something else ? thanks , hershrev Functions and handlers (functions start with function, handlers with on) should execute at about the same speed, both very fast unless you are really counting your milliseconds. The convenience of writing a function rather than putting the code into your button's mouseUp handler is that you can reuse the function and call if from various other places. HTH, Brian ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Hard code or portable code
I think we are not on the same track. On Wednesday, March 3, 2004, at 02:03 AM, Dar Scott wrote: On Tuesday, March 2, 2004, at 08:21 PM, hershrev wrote: is there a way to imitate hard code with some kind of container ? Here are a couple of ideas: 1. Use a list of names-- Create a list in a manner much like this: repeat with x = 1 to the number of fields put (the name of field x) LF after myVar end repeat Now , how do you get the contents of all the fields ? if you put myVar into myQuery, the result will be the field names and not the field content ? ( THE MAIN POINT IS TO GET THE LATEST DATA meaning if the user edits the field after the repeat script the result should be the updated contents as hard code) if you come up with a recipe for this I'll raise my hat for you. thanks , hershrev Dar Scott ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Hard code or portable code
Hershrev, I'm not sure I understand what you mean by hard-code. If you want a persistent way to reference a field, regardless of it's name, you can use the ID. Or, to get all of the fields, something like: repeat with i=1 to (the number of flds) put fld i after myVar end repeat If you want to write a function that always returns you the latest: function latestFields local myVar repeat with i=1 to (the number of flds) put fld i after myVar end repeat return myVar end latestFields HTH, Brian Now , how do you get the contents of all the fields ? if you put myVar into myQuery, the result will be the field names and not the field content ? ( THE MAIN POINT IS TO GET THE LATEST DATA meaning if the user edits the field after the repeat script the result should be the updated contents as hard code) if you come up with a recipe for this I'll raise my hat for you. ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Hard code or portable code
On Wednesday, March 3, 2004, at 08:44 PM, Brian Yennie wrote: Hershrev, I'm not sure I understand what you mean by hard-code. If you want a persistent way to reference a field, regardless of it's name, you can use the ID. Or, to get all of the fields, something like: repeat with i=1 to (the number of flds) put fld i after myVar end repeat If you want to write a function that always returns you the latest: function latestFields local myVar repeat with i=1 to (the number of flds) put fld i after myVar end repeat return myVar What result will return myVar give, the fields names or contents of the fields ? end latestFields HTH, Brian Now , how do you get the contents of all the fields ? if you put myVar into myQuery, the result will be the field names and not the field content ? ( THE MAIN POINT IS TO GET THE LATEST DATA meaning if the user edits the field after the repeat script the result should be the updated contents as hard code) if you come up with a recipe for this I'll raise my hat for you. ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Hard code or portable code
On Wednesday, March 3, 2004, at 06:06 PM, hershrev wrote: Create a list in a manner much like this: repeat with x = 1 to the number of fields put (the name of field x) LF after myVar end repeat Now , how do you get the contents of all the fields ? if you put myVar into myQuery, the result will be the field names and not the field content ? ( THE MAIN POINT IS TO GET THE LATEST DATA meaning if the user edits the field after the repeat script the result should be the updated contents as hard code) I am probably still a little lost. I guess I don't know what hard code is. Once the above is set, you can get the contents with this: put LF into bindingChar put empty into valueAccumulator repeat for each line f in myVar put field f after valueAccumulator end repeat Do you want to have all the field values evaluated each time you look at the variable? I don't know how to do that. Here are three things that might be close. A. Use a function instead of a variable. put catFields() into ... B. Use value on the variable. Set it up like this: field Alpha field Beta' field Gamma Use it like this put value(autoCatFields) into ... C. Use properties. If all those field are in a group, then define a custom property with a getProp that calculates the concatenation of the values of all fields within the group. put the catFields of group Will Robinson into ... Am I getting closer? Dar Scott ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Hard code or portable code
On Wednesday, March 3, 2004, at 08:52 PM, Dar Scott wrote: On Wednesday, March 3, 2004, at 06:06 PM, hershrev wrote: Create a list in a manner much like this: repeat with x = 1 to the number of fields put (the name of field x) LF after myVar end repeat Now , how do you get the contents of all the fields ? if you put myVar into myQuery, the result will be the field names and not the field content ? ( THE MAIN POINT IS TO GET THE LATEST DATA meaning if the user edits the field after the repeat script the result should be the updated contents as hard code) I am probably still a little lost. I guess I don't know what hard code is. Hard code is writing in the editor on mouseUp put field 1 field 2 into mSql end mouseUp Once the above is set, you can get the contents with this: put LF into bindingChar put empty into valueAccumulator repeat for each line f in myVar put field f after valueAccumulator end repeat Do you want to have all the field values evaluated each time you look at the variable? I don't know how to do that. Here are three things that might be close. A. Use a function instead of a variable. put catFields() into ... B. Use value on the variable. Set it up like this: field Alpha field Beta' field Gamma Use it like this put value(autoCatFields) into ... C. Use properties. If all those field are in a group, then define a custom property with a getProp that calculates the concatenation of the values of all fields within the group. put the catFields of group Will Robinson into ... Am I getting closer? Dar Scott ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Hard code or portable code
On Wednesday, March 3, 2004, at 06:50 PM, hershrev wrote: If you want to write a function that always returns you the latest: function latestFields local myVar repeat with i=1 to (the number of flds) put fld i after myVar end repeat return myVar What result will return myVar give, the fields names or contents of the fields ? end latestFields Contents Dar Scott ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Hard code or portable code
Yes , All hats up for you. Just a question, why when I write ... put function () into field x it doesn't replace the old contents of the field ? Also to understand how does it work, when is this function activated ? On Wednesday, March 3, 2004, at 08:44 PM, Brian Yennie wrote: Hershrev, I'm not sure I understand what you mean by hard-code. If you want a persistent way to reference a field, regardless of it's name, you can use the ID. Or, to get all of the fields, something like: repeat with i=1 to (the number of flds) put fld i after myVar end repeat If you want to write a function that always returns you the latest: function latestFields local myVar repeat with i=1 to (the number of flds) put fld i after myVar end repeat return myVar end latestFields Now to compare if I write on mouseUp repeat with x=1 to the number of flds put text of field x return after y end repeat put y into fld 1 end mouseUp what is the difference besides function or message, speed wise or something else ? thanks , hershrev HTH, Brian Now , how do you get the contents of all the fields ? if you put myVar into myQuery, the result will be the field names and not the field content ? ( THE MAIN POINT IS TO GET THE LATEST DATA meaning if the user edits the field after the repeat script the result should be the updated contents as hard code) if you come up with a recipe for this I'll raise my hat for you. ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Hard code or portable code
On Tuesday, March 2, 2004, at 08:21 PM, hershrev wrote: is there a way to imitate hard code with some kind of container ? Here are a couple of ideas: 1. Use a list of names-- Create a list in a manner much like this: repeat with x = 1 to the number of fields put (the name of field x) LF after myVar end repeat Use it much like this (say to sum): put 0 into fieldSum repeat for each line f in myVar add field f to fieldSum end repeat OR 2. Add a numerical subscript to fields of a particular type-- Say some fields are named count 1, count 2 and so on. Create the count like this: put 0 into numberOfCountFields repeat with x = 1 to the number of fields if the name of field x starts with count then add 1 to numberOfCountFields end if end repeat (Or you can just type it into a custom property and use that, if the number is fixed.) Use it like this: put 0 into fieldSum repeat with x = 1 to numberOfCountFields add field (count x) to fieldSum end repeat 3. Or some other variation or combination... Dar Scott ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
