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On this page
  • Method Signature
  • Arguments
  • Examples
  • Replace uppercase 'U' with lowercase 'u'
  • Replace uppercase 'O' with lowercase 'o', but only once
  • Example using Callback Function
  • Example with start argument (Replace lowercase 'o' with uppercase 'O' from the third position)
  • Additional Examples
  • Related

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  1. BoxLang Language
  2. Reference
  3. Built-in Functions
  4. string

Replace

PreviousRepeatStringNextReplaceList

Last updated 19 days ago

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Replaces occurrences of substring1 in a string with obj, in a specified scope.

The search is case-sensitive. Function returns original string with replacements made

Method Signature

Replace(string=[string], substring1=[string], obj=[any], scope=[string])

Arguments

Argument
Type
Required
Description
Default

string

string

true

The string to search

substring1

string

true

The substring to search for

obj

any

true

The string to replace substring1 with

scope

string

true

The scope to search in

one

Examples

Replace uppercase 'U' with lowercase 'u'

Replace in Script Syntax

getVal = replace( "Boxlang", "U", "u" );
writeDump( getVal );

Result: Boxlang

Replace uppercase 'O' with lowercase 'o', but only once

Something similar in Tag Syntax

<bx:set getVal1 = replace( "Boxlang", "O", "o", "ONE" ) >
<bx:dump var="#getVal1#"/>

Result: Boxlang

Example using Callback Function

You can pass in a callback function to the third argument of the replace function


public function upCase( Any pattern, Any position, Any orig ) {
	return uCase( pattern );
}
result = replace( "A man a plan a canal.", "an", upCase, "ALL" );
writeOutput( result );

Result: A mAN a plAN a cANal.

Example with start argument (Replace lowercase 'o' with uppercase 'O' from the third position)

You can pass position to start searching in the string

getRes = replace( "Love Boxlang", "o", "O", "ALL", "3" );
writeOutput( getRes );

Result: Love Boxlang

Additional Examples

writeDump( replace( "xxabcxxabcxx", "abc", "def" ) );
writeDump( replace( "xxabcxxabcxx", "abc", "def", "All" ) );
writeDump( replace( "abc", "a", "b", "all" ) );
writeDump( replace( "a.b.c.d", ".", "-", "all" ) );
test = "camelcase CaMeLcAsE CAMELCASE";
test2 = Replace( test, "camelcase", "CamelCase", "all" );
writeDump( test2 );
replacer = ( Any find, Any index, Any input ) => {
	dump( var=arguments, label="replacement arguments" );
	return "-#index#-";
};
writeDump( var=replace( "one string, two strings, three strings", "string", replacer, "all" ), label="replace with a function" );
writeDump( var=replace( "one string, two strings, three strings", {
	"one" : 1,
	"two" : 2,
	"three" : 3,
	"string" : "txt",
	"text" : "string"
} ), label="replace via a struct" );
 // struct keys need to be quoted

Related

Run Example
Run Example
Run Example
Run Example
SpanIncluding
ReFind
reFindNoCase
KebabCase
Ascii
Val
StringFilter
Compare
TrueFalseFormat
ReReplace
reReplaceNoCase
StripCR
Insert
CamelCase
StringBind
SnakeCase
Right
FindOneOf
ReEscape
SpanExcluding
CompareNoCase
StringReduceRight
Reverse
ReplaceList
ReplaceListNoCase
StringReduce
Slugify
Wrap
PascalCase
StringSort
StringEach
Trim
LTrim
UCFirst
Find
FindNoCase
ReMatch
reMatchNoCase
LJustify
RJustify
CharsetEncode
StringEvery
Left
UCase
ListReduce
YesNoFormat
Char
ReplaceNoCase
RemoveChars
RTrim
JSStringFormat
RepeatString
CharsetDecode
StringSome
SQLPrettify
StringMap
QueryStringToStruct
Mid
LCase
ParagraphFormat