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jvs:fscan:manual:chapter4

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jvs:fscan:manual:chapter4 [2013/10/08 21:19]
voyvodic [Accessing data variables] 		jvs:fscan:manual:chapter4 [2023/02/23 18:43] (current)
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 ==== Accessing data variables ==== ==== Accessing data variables ====
-In general, data variable values can be accessed by specifying the name of the variable, preceded by the '$' character.  To get the status of a variable, substitute '?' for '$'; the status is -1 if the named variable is not defined, it is 0 if it is defined but empty, and it is a positive value (the size of the variable) if it is defined and not empty.+In general, data variable values can be accessed by specifying the name of the variable, preceded by the '$' character (or '_' character to make command-line scripting easier).  To get the status of a variable, substitute '?' for '$'; the status is -1 if the named variable is not defined, it is 0 if it is defined but empty, and it is a positive value (the size of the variable) if it is defined and not empty. 
 + 
 +Variable operators:                
 +  * $varbname - the value of the named variable (_varbname works the same) 
 +  * ?varbname - the status of the named variable (0=undefined, 1=defined)
  
 For example:\\ For example:\\
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   * -echo Varb: ?curdir ?thiswin ?myvarb            ; test whether these variables are defined   * -echo Varb: ?curdir ?thiswin ?myvarb            ; test whether these variables are defined
  
-Variable operators:                +The '$' character is also used to identify fScan special functions of the form: $funcname(). Examples are:
-  * $ +
-  * ?+
   * $exists(filename) - does the named file exist (0=no, 1=regular file, 2=directory)?   * $exists(filename) - does the named file exist (0=no, 1=regular file, 2=directory)?
   * $filepath(filename) - return the full path to the named file   * $filepath(filename) - return the full path to the named file
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   * $date(filename) - return a string containing the file modification date (yyyymmddhhmmss)   * $date(filename) - return a string containing the file modification date (yyyymmddhhmmss)
   * $age(filename) - return the age of the named file in seconds   * $age(filename) - return the age of the named file in seconds
 +
   * tables   * tables
     * listitem     * listitem
jvs/fscan/manual/chapter4.1381267162.txt.gz · Last modified: 2014/08/04 16:03 (external edit)

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