Special symbols

To specify, for example, space in a search condition, it's required to make it visible, i.e. enter some symbol or set of symbols which will be identified as invisible.

\s - letter s after the backslash describe space or tabulation character. Space also can be specified the general way, but [a-z\s] template will be more clear than [a-z ]. Use this symbols carefully because it's the same as space, tabulation and a symbol of new string.

\S - visible symbols. i.e. all symbols which are not coincide with \s

\w - special symbol exchanging the whole symbol sorting and containing all symbols which can be specified in a word, mostly it is [a-zA-Z_], but it depends on installed localization, Unicode supporting, etc.

\W - all symbols which are not coincide with \w or [^a-zA-A_]

\d - all digits, i.e. [0-9]

\D - non-digit symbols

Often special symbols describe commonly used character sets, but these sets have boundaries, i.e. digits, letters and underlining or invisible symbols. To describe all symbols use a point. For example,

.{5} - five different symbols.

To describe a point, set the backslash before it: \.

To search a backslash after which a point is going, enter the double slash as literal in a search condition:

Similarly, to enter two backslashes, it's required to double them: \\\\