TextUnescaper | Topcoder Archive

Problem Statement

You are given a String[] text. Each element of text represents a single line. A character is called escaped if it is immediately preceded by an unescaped slash character. Otherwise, it is called unescaped. For example, in the string "hello/nworld" the character 'n' is escaped, but in the string "hello//nworld", it is not. In the second example the second slash character is escaped by the first one. If an unescaped slash ends a line, it does not escape any character.

Replace all escaped 'n' characters in text with line breaks. Then, remove all remaining slashes that currently escape a character, and return the resulting text as a String[]. Each element of this String[] should correspond to a line of the text. text may contain empty strings, which must be preserved in the return value (see examples for clarification).

Definition

Class:: TextUnescaper
Method:: processLines
Parameters:: String[]
Returns:: String[]
Method signature:: String[] processLines(String[] text)
(be sure your method is public)

Notes

Do not process "/N" as a line break. It is case sensitive.

Constraints

text will contain between 1 and 50 elements, inclusive.
Each element of text will contain between 0 and 50 characters, inclusive.
Each element of text will contain letters ('a'..'z', 'A'..'Z'), digits ('0'..'9'), spaces (' ') and slashes ('/') only.

Examples

```
{"First line/nSecond line", "Third /line/", "/And //fourth"}
```
```
Returns: {"First line", "Second line", "Third line/", "And /fourth" }
```
The first line is divided into two lines because of the escaped 'n'. In the second line of the original text, only the first slash escapes a character. In the third line of the original text, the first two slashes each escape a character. However, the third slash doesn't escape a character because it is escaped by the second slash.
```
{"/n", "", "/n/n/n"}
```
```
Returns: {"", "", "", "", "", "", "" }
```
There are three lines and four escaped 'n's. So the result contains seven empty lines.

{"Just plain", "text", "nothing special"}

Returns: {"Just plain", "text", "nothing special" }

{"Beware of this//n"}

Returns: {"Beware of this/n" }

```
{"///n", "/N"}
```
```
Returns: {"/", "", "N" }
```
Do not process "/N" as a line break.

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