Expression

Selector operator

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The following show 3 different kinds of selector operation statements in Lemoncase2, which can help users select the corresponding attributes of page elements more conveniently.

<# “selector” />

Get the number of elements that matches the selector. Calculation expressions and variables can be applied.

<@ “selector” />

Get the visible contents of inner-text of the 1st element that matches the selector. If related content does not exist, output null.

<! “selector” />

Check whether the element exists or not. Output true if such element exists, otherwise output null.

The example shows bellow:

process main () {

    // The world's leading software development platform · GitHub
    jumpto "https://github.com/";
    wait 2333;

    // <# "selector"/>
    log <# "div" />; // Output the number of tag "div"
    log <# ".form" />+1; // Output the number of class "form"

    // <@ "selector"/>
    log <@ "h1"/>;  // Output the inner text of  tag "h1"
    log <@ "label[for*=user]"/>;
    log <@ "#user\\[login\\]"/>; // Need translation symbol
    log <@ ".form-control[name=timestamp_secret] + button"/>; // Adjacent sibling selector is available

    // <! "selector"/>
    log <! "#js"/>; // id="js" doesn't exist in html
    log <! "a"/>;// tag a exists in html
}

Compare operator

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~~ : Approximately equal to

• [string] ~~ [string] A part of string A is the same as string B.
  
• [string] ~~ [/RegExp/] A part of string A can matches the regular expression B.
  

"Lemonce"~~/[A-Z][a-t]/ //Output：true
"Lemonce"~~"mon" //Output：true

== : Equal to

• [string] == [string] String A is exactly the same as string B.
  
• [var] == [var] Variable A is exactly the same as variable B.
  

"Lemonce" == "Lemonce" //Output：true
"x" == "x" //Output：true

!~ : Not appromimately equal to

• [string] !~ [string] No part of string A is the same as string B.
  
• [string] !~ [/RegExp/] No part of string A could match the regular expression B.
  

"Lemonce"!~/L[A-Z][a-t]/ //Output：true
"Lemonce"!~"mon" //Output：false

!= : Not equal to

• [string] != [string] String A is different from string B.
  
• [var] != [var] Variable A is different from string B.
  

"Lemonce" != "Lemonce" //Output：false
"x" != "y" //Output：true