Write a method to replace all spaces in a string with '%20'
Instead of using str.replaceAll("\\s", "%20"), here is a function. This exercise is to help learning.
public String URLifyJava8(String str) { | |
return str.chars() | |
.mapToObj(c -> (char) c) | |
.flatMap(c -> Character.isWhitespace(c) | |
? "%20".chars().mapToObj(ch -> (char) ch) : Stream.of(c)) | |
.collect(Collector | |
.of(StringBuilder::new, StringBuilder::append, | |
(r1, r2) -> { | |
r1.append(r2); | |
return r1; | |
}, | |
StringBuilder::toString, Collector.Characteristics.CONCURRENT)); | |
} |
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