Page Comparison

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• Hash functions:
  • newMap(): this function creates a new hash table.
  • clear(var): empties the hash table stored in the variable var.
  • get(var1,var2): returns the value associated to the key var2 in the hash table var1.
  • set(var1,var2,var3): sets the value var3 to the key var2 in the hash table var1.
• List functions:
  • get(var1,var2): returns the value associated to index var2 in list var1 (index can also be the string "random" in that case the function returns a random element of the list).
  • exists(var1,var2,var3): returns true iff there exists an element of var2 for which var3 is true when substituted to the variable named var1.
  • intersect(var1,var2): computes the intersection between the two given collections.
  • len(var1): returns the length of the given list.
  • removeIf(var1,var2,var3),removeIfNot(var1,var2,var3): returns the list formed by the elements of the list var2 for which the boolean expression var3 is false (,true). var1 is the loop variable.
  • set(var1,var2,var3): sets the value var3 at position var2 in list var1.
  • subtract(var1,var2): removes all the elements in the list var2 from the list var1.
  • union(var1,var2): computes the union of the two lists.
• String functions:
  • match(var1,var2): maps to the String.matches(regexp) Java method. var1 must be a string or evaluate to one. var2 must be a string or evaluate to one. The content of var2 must be a valid Java regular expression.
  • concatenate(var1,...,varn): concatenates the provided strings.
• Time functions:
  • currentTime(): returns the current time in milliseconds since 1/1/1970.
  • getLastTimeMark(var1): returns the last time (in milliseconds since 1/1/1970) the current operator was in state var1, where var1 can be either "DONE" or "ENTER".
  • getLastTimeMark(var1,var2): returns the last time the current operator said the speech act var2. Var1 must be "SAY".
• Ordering:
  • follows(var1,var2): var1 is a string constant (or a variable with a string constant as value) and var2 is a boolean (or a variable with a boolean value). Var2 is optional, by default it's false. The function returns true if the operator named by var1 has already been executed. If var2 is true, then the function returns true only if the operator named by var1 has already been completed (that is, any final state in the operator has been executed (as opposed to being swapped out before completion)).
• Topic:
  • isCurrentTopic(var): returns true if the provided string or variable containing a string matches one of the topics of the sub-dialogue currently active.
  • isLastNonNullTopic(var): similar to isCurrentTopic but executes the match on the last non null topic. That is, if currently there are no active networks, this will match the value of var with the topic of the last active network.
• Numbers:
  • min
  random(var): generates a random
  • (var1,...,varn),max(var1,...,varn): returns the min/max of the given list of numbers.
  • random(var): generates a random number from 0 to the value in var-1. var doesn't have to be a variable but can also be a numeric constant.
  • round(var): returns the output of java.lang.Math.round applied to the input argument when converted to a float value.
• Debug:
  • trace(var): prints a java stack trace when var is evaluated.
  • print(var): prints the value of var when the expression is evaluated by the system.
• Other:
  • if(var1,var2,var3): return the evaluation of var2 if var1 evaluates to true, if var1 evaluates to false it returns the evaluation of var3. null if var1 returns null.
  • known(expr): this returns true of the provided expression evaluates to anything but the NULL value.
  • numToString(var): returns the string representation of the given number. For example, it returns "twenty three" for 23.
  • hasBeenInterrupted(var): returns true if the current operator has been swapped out by an interruption.
  • isInterruptible(): returns true if the current transition being executed is interruptible (by the user).
  • isQuestion(var): returns true if the provided var evaluates to a string that contains the string "question". This maps to the method edu.usc.ict.nl.io.NLU.isQuestion overwrite with your own specific NLU class if you want to customize or write a new custom function.

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