how would I trim a mix of newline and space characters from the beginning and en

Question

how would I trim a mix of newline and space characters from the beginning and end of a text string? For example,
"
this is
a string

" becomes
"this is
a string"

Janaki Devi A · Answer

To remove mix of newline and space characters in the beginning of a text 
 
 Create two rules which works in recursive manner 
 rule1: 
 with( local!regexMatch:if(rule!APN_isBlank(ri!input),{}, regexfirstmatch({"^[\s]+|[\s]+$]"},ri!input)), local!correctvalue: if(rule!APN_isBlank(local!regexMatch),{}, replace(ri!input,1,(search(local!regexMatch,ri!input,1)),"")), if(rule!APN_isEmpty(local!correctvalue),ri!input, if(rule!APN_isBlank(regexfirstmatch({"^[\s]+|[\s]+$]"},local!correctvalue)),local!correctvalue, rule!rule2(input:local!correctvalue)))) 
 
 rule2: 
 with( local!regexMatch:if(rule!APN_isBlank(ri!input),{}, regexfirstmatch({"^[\s]+|[\s]+$]"},ri!input)), local!correctvalue: if(rule!APN_isBlank(local!regexMatch),{}, replace(ri!input,1,(search(local!regexMatch,ri!input,1)),"")), if(rule!APN_isEmpty(local!correctvalue),ri!input, if(rule!APN_isBlank(regexfirstmatch({"^[\s]+|[\s]+$]"},local!correctvalue)),local!correctvalue, rule! rule1 (input:local!correctvalue))) ) 
 
 saveInto in the interface: 
 saveInto: { a!save(local!input,save!value), a!save( ri!input,if(regexmatch("^[ 
]*$",save!value),{}, rule!rule1(input:save!value)))}

To remove mix of newline and space characters in the end of a text 
 Create two rules which works in recursive manner 
 rule1: 
 with( local!length:len(ri!input), local!regexMatch:if(rule!APN_isBlank(ri!input),{}, regexmatch({"[$|\s]"},index(ri!input,local!length,{}))), local!correctvalue: if(local!regexMatch, replace(ri!input,local!length,1,""),{}), if(rule!APN_isEmpty(local!correctvalue),ri!input, if(regexmatch({"[$|\s]"},index(local!correctvalue,len(local!correctvalue),{})), rule!rule2(input:local!correctvalue), local!correctvalue, ))) 
 
 rule2: 
 with( local!length:len(ri!input), local!regexMatch:if(rule!APN_isBlank(ri!input),{}, regexmatch({"[$|\s]"},index(ri!input,local!length,{}))), local!correctvalue: if(local!regexMatch, replace(ri!input,local!length,1,""),{}), if(rule!APN_isEmpty(local!correctvalue),ri!input, if(regexmatch({"[$|\s]"},index(local!correctvalue,len(local!correctvalue),{})), rule!rule2(input:local!correctvalue), local!correctvalue, ))) 
 
 saveInto in the interface: 
 saveInto: { a!save(local!input,save!value), a!save( ri!input, rule!rule1(input:save!value))} 
 
 In SaveInto, rules for removing space in the beginning and end can be called one after the other and save the value 
 Hope this helps

Janaki Devi A · Answer

To remove mix of newline and space characters in the beginning of a text 
 
 Create two rules which works in recursive manner 
 rule1: 
 with( local!regexMatch:if(rule!APN_isBlank(ri!input),{}, regexfirstmatch({"^[\s]+|[\s]+$]"},ri!input)), local!correctvalue: if(rule!APN_isBlank(local!regexMatch),{}, replace(ri!input,1,(search(local!regexMatch,ri!input,1)),"")), if(rule!APN_isEmpty(local!correctvalue),ri!input, if(rule!APN_isBlank(regexfirstmatch({"^[\s]+|[\s]+$]"},local!correctvalue)),local!correctvalue, rule!rule2(input:local!correctvalue)))) 
 
 rule2: 
 with( local!regexMatch:if(rule!APN_isBlank(ri!input),{}, regexfirstmatch({"^[\s]+|[\s]+$]"},ri!input)), local!correctvalue: if(rule!APN_isBlank(local!regexMatch),{}, replace(ri!input,1,(search(local!regexMatch,ri!input,1)),"")), if(rule!APN_isEmpty(local!correctvalue),ri!input, if(rule!APN_isBlank(regexfirstmatch({"^[\s]+|[\s]+$]"},local!correctvalue)),local!correctvalue, rule! rule1 (input:local!correctvalue))) ) 
 
 saveInto in the interface: 
 saveInto: { a!save(local!input,save!value), a!save( ri!input,if(regexmatch("^[ 
]*$",save!value),{}, rule!rule1(input:save!value)))} 
 
 To remove mix of newline and space characters at the end of a text 
 
 Create two rules which works in recursive manner 
 rule1: 
 with( local!length:len(ri!input), local!regexMatch:if(rule!APN_isBlank(ri!input),{}, regexmatch({"[$|\s]"},index(ri!input,local!length,{}))), local!correctvalue: if(local!regexMatch, replace(ri!input,local!length,1,""),{}), if(rule!APN_isEmpty(local!correctvalue),ri!input, if(regexmatch({"[$|\s]"},index(local!correctvalue,len(local!correctvalue),{})), rule!rule2(input:local!correctvalue), local!correctvalue, ))) 
 rule2: 
 with( local!length:len(ri!input), local!regexMatch:if(rule!APN_isBlank(ri!input),{}, regexmatch({"[$|\s]"},index(ri!input,local!length,{}))), local!correctvalue: if(local!regexMatch, replace(ri!input,local!length,1,""),{}), if(rule!APN_isEmpty(local!correctvalue),ri!input, if(regexmatch({"[$|\s]"},index(local!correctvalue,len(local!correctvalue),{})), rule! rule1 (input:local!correctvalue), local!correctvalue, )) ) 
 
 SaveInto in the interface: 
 saveInto: { a!save(local!input,save!value), a!save( ri!input, rule!rule1(input:save!value))} 
 
 to remove empty space in the beginning and at end, in save into call these rules one after the other and then save value 
 Hope this helps