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Fixes #29 grammatical mistakes

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Zeeshan Ahmed 2017-08-12 06:42:44 +05:00
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@ -16,9 +16,9 @@ A regular expression is a pattern that is matched against a subject string from
mouthful, you will usually find the term abbreviated as "regex" or "regexp". Regular expression is used for replacing a text within
a string, validating form, extract a substring from a string based upon a pattern match, and so much more.
Imagine you are writing an application and you want to set the rules when user choosing their username. We want the username can
contains letter, number, underscore and hyphen. We also want to limit the number of characters in username so it does not look ugly.
We use the following regular expression to validate a username:
Imagine you are writing an application and you want to set the rules for when a user chooses their username. We want to
allow the username to contain letters, numbers, underscores and hyphens. We also want to limit the number of
characters in username so it does not look ugly. We use the following regular expression to validate a username:
<br/><br/>
<p align="center">
<img src="https://i.imgur.com/ekFpQUg.png" alt="Regular expression">
@ -59,7 +59,7 @@ contains uppercase letter and also it is too short.
## 1. Basic Matchers
A regular expression is just a pattern of letters and digits that we use to perform search in a text. For example, the regular expression
A regular expression is just a pattern of characters that we use to perform search in a text. For example, the regular expression
`the` means: the letter `t`, followed by the letter `h`, followed by the letter `e`.
<pre>
@ -81,7 +81,7 @@ case-sensitive so the regular expression `The` would not match the string `the`.
## 2. Meta Characters
Meta characters are the building blocks of the regular expressions. Meta characters do not stand for themselves but instead are
interpreted in some special way. Some meta characters have a special meaning that are written inside the square brackets.
interpreted in some special way. Some meta characters have a special meaning and are written inside square brackets.
The meta characters are as follows:
|Meta character|Description|
@ -271,9 +271,10 @@ expression `(f|c|m)at\.?` means: lowercase letter `f`, `c` or `m`, followed by l
## 2.8 Anchors
In regular expressions, to check if the matching symbol is the starting symbol or ending symbol of the input string for this purpose
we use anchors. Anchors are of two types: First type is Caret `^` that check if the matching character is the start character of the
input and the second type is Dollar `$` that checks if matching character is the last character of the input string.
In regular expressions, we use anchors to check if the matching symbol is the starting symbol or ending symbol of the
input string. Anchors are of two types: First type is Caret `^` that check if the matching character is the start
character of the input and the second type is Dollar `$` that checks if matching character is the last character of the
input string.
### 2.8.1 Caret