If ... then (1st return) ... ;

else (2nd return) ... ;

Tests on empty / non-empty values

Tests on empty values

=== If it's empty, we can return an empty String ===

if (_str1.equals(""))
return "";
return _str1;

=== If it's empty, we can tell Mx to not evaluate the operation ===

if (_str1.equals("")) 
return DoJava.DO_NOT_ADD_OPERATION_IN;
return _str1;

Tests on non-empty values

=== If it's not empty (non-equal to an empty string: "") ===

if (!_str1.equals("")) 
return _str1;
return "";

Tests with numbers

==== Equality ====

if ((Str.ToDouble(_str1) == (Str.ToDouble(_str2)) return _str3;

==== Inequality ====

if ((Str.ToDouble(_str1) != (Str.ToDouble(_str2)) return _str3;

==== Strictly superior to ====

if ((Str.ToDouble(_str1) > (Str.ToDouble(_str2)) return _str3;

==== Strictly inferior to ====

if ((Str.ToDouble(_str1) < (Str.ToDouble(_str2)) return _str3;

==== Superior or equals to ====

if ((Str.ToDouble(_str1) >= (Str.ToDouble(_str2)) return _str3;

==== Inferior or equals to ====

if ((Str.ToDouble(_str1) <= (Str.ToDouble(_str2)) return _str3;

==== Strictly superior to line above or below- Warning: Case-sensitive ====

if(Str.ToDouble(_doJava.get("_str2",-1))< Str.ToDouble(_str2)) return _str2;

if(Str.ToDouble(_doJava.get("_str2",+1))< Str.ToDouble(_str2)) return _str2;

==== Strictly inferior to line above or below- Warning: Case-sensitive ====

if(Str.ToDouble(_doJava.get("_str2",-1))> Str.ToDouble(_str2)) return _str2;

if(Str.ToDouble(_doJava.get("_str2",+1))> Str.ToDouble(_str2)) return _str2;

Tests with strings

In equality tests, it is preferable to put the reference string first in order to simultaneously test whether it is null or not.

==== Perfect equality - Warning: Case-sensitive ====

if ("T0".equals(_str1)) return "1";

==== Perfect equality with line above or below- Warning: Case-sensitive ====

if (_str1.equals(_doJava.get("_str1",-1))) return "1";

if (_str1.equals(_doJava.get("_str1",+1))) return "1";

==== Inequality - Warning: Case-sensitive ====

<b>if</b> (!"T0".equals(_str1)) <b>return</b> "1";

==== Case-insensitive equality ====

if ("T0".equalsIgnoreCase(_str1)) return "1";

==== Does not contain ====

if (!_str1.equals("") && !_str1.contains("T1")) return "1";

== Operands ==
==== AND ====

if (_str1.contains("T600") && "A".equals(_str2)) return _str3;

==== OR ====

if (_str1.contains("T600") || "A".equals(_str2)) return _str3;

==Ternary Operator==
====Syntax====

 (<"Condition">) ? <"Value if true"> : <"Value if false">;

====The ternary operator is a shorthand if-then statement that returns a value====

double flow = Str.ToDouble(_str1);
return (flow < 0) ? 0 : flow;

====This is equivalent to====

double flow = Str.ToDouble(_str1);
if (flow < 0) 
  return 0;
else 
  return flow;

Operands

==== AND ====

if (_str1.contains("T600") && "A".equals(_str2)) return _str3;

==== OR ====

if (_str1.contains("T600") || "A".equals(_str2)) return _str3;

Ternary Operator

====Syntax====

 (<"Condition">) ? <"Value if true"> : <"Value if false">;

====The ternary operator is a shorthand if-then statement that returns a value====

double flow = Str.ToDouble(_str1);
return (flow < 0) ? 0 : flow;

====This is equivalent to====

double flow = Str.ToDouble(_str1);
if (flow < 0) 
  return 0;
else 
  return flow;