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Fix typos (#25)

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Aziz Yokubjonov 2017-07-27 20:25:05 -04:00 committed by Zeeshan Ahmed
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@ -140,13 +140,13 @@ the letter `r`.
## 2.3 Repetitions
Following meta characters `+`, `*` or `?` are used to specify how many times a subpattern can occurs. These meta characters act
Following meta characters `+`, `*` or `?` are used to specify how many times a subpattern can occur. These meta characters act
differently in different situations.
### 2.3.1 The Star
The symbol `*` matches zero or more repetitions of the preceding matcher. The regular expression `a*` means: zero or more repetitions
of preceding lowercase character `a`. But if it appears after a character set or class that it finds the repetitions of the whole
of preceding lowercase character `a`. But if it appears after a character set or class then it finds the repetitions of the whole
character set. For example, the regular expression `[a-z]*` means: any number of lowercase letters in a row.
<pre>
@ -224,7 +224,7 @@ the comma the regular expression `[0-9]{2}` means: Match exactly 2 digits.
## 2.5 Character Group
Character group is a group of sub-pattern that is written inside Parentheses `(...)`. As we discussed before that in regular expression
Character group is a group of sub-patterns that is written inside Parentheses `(...)`. As we discussed before that in regular expression
if we put a quantifier after a character than it will repeat the preceding character. But if we put quantifier after a character group then
it repeats the whole character group. For example, the regular expression `(ab)*` matches zero or more repetitions of the character "ab".
We can also use the alternation `|` meta character inside character group. For example, the regular expression `(c|g|p)ar` means: lowercase character `c`,
@ -274,7 +274,7 @@ input and the second type is Dollar `$` that checks if matching character is the
Caret `^` symbol is used to check if matching character is the first character of the input string. If we apply the following regular
expression `^a` (if a is the starting symbol) to input string `abc` it matches `a`. But if we apply regular expression `^b` on above
input string it does not match anything. Because in input string `abc` "b" is not the starting symbol. Let's take a look on another
input string it does not match anything. Because in input string `abc` "b" is not the starting symbol. Let's take a look at another
regular expression `^(T|t)he` which means: uppercase character `T` or lowercase character `t` is the start symbol of the input string,
followed by lowercase character `h`, followed by lowercase character `e`.