replace

replace(string, pat, r[, n])

Search for the given pattern pat, and replace each occurrence with r. If n is provided, replace at most n occurrences. As with search, the second argument may be a single character, a vector or a set of characters, a string, or a regular expression. If r is a function, each occurrence is replaced with r(s) where s is the matched substring. If pat is a regular expression and r is a SubstitutionString, then capture group references in r are replaced with the corresponding matched text.

Examples

Replace a single occurrence in a string:
```
julia> replace("Hello, world!", "world", "Julia")
"Hello, Julia!"
```
This example replaces the first occurrence of the string "world" with "Julia" in the given string.
Replace multiple occurrences in a string:
```
julia> replace("Julia is awesome. Julia is fast.", "Julia", "Python")
"Python is awesome. Python is fast."
```
It replaces all occurrences of the string "Julia" with "Python" in the given string.
Replace using a regular expression pattern:
```
julia> replace("Hello, 123!", r"\d+", "world")
"Hello, world!"
```
In this example, it uses a regular expression pattern \d+ to match one or more digits and replaces it with the string "world".
Replace using a function:
```
julia> replace("Hello, Julia!", "Julia") do s
          uppercase(s)
      end
"Hello, JULIA!"
```
It replaces the matched substring "Julia" with the uppercase version of itself using a provided function.
Replace a limited number of occurrences:
```
julia> replace("Hello, hello, hello, hello!", "hello", "hi", 2)
"Hello, hi, hi, hello!"
```
It replaces a maximum of 2 occurrences of the string "hello" with "hi" in the given string.

Common mistake example:

julia> replace("Hello, world!", 'o', "i")
ERROR: MethodError: no method matching replace(::String, ::Char, ::String)

In this example, the second argument is provided as a character ('o') instead of a string or regular expression. When using the replace function, ensure that the second argument is of the correct type (string or regular expression) to avoid such errors.

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replace

Examples

See Also

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