string_util_functions.md

List of underscore string functions

camelize

method: camelize(string, uppercase_first_letter=True)

custom implementation / needs to be installed

Converts underscored or dasherized string to a camelized one. Begins with a lower case letter unless it starts with an underscore, dash or an upper case letter.

example

clean

method: clean(string)

custom implementation / needs to be installed

Trim and replace multiple spaces with a single space.

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classify

method: classify(string)

custom implementation / needs to be installed

Converts string to camelized class name. First letter is always upper case.

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count

method: count(haystack, needle)

custom implementation / needs to be installed

Counts the number of times needle is in haystack

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dasherize

method: dasherize(string)

custom implementation / needs to be installed

Converts a underscored or camelized string into an dasherized one

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decapitalize

method: decapitalize(string)

custom implementation / needs to be installed

Converts first letter of the string to lowercase.

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dedent

method: dedent(string)

custom implementation / needs to be installed

Using Python Standard Library textwrap

Remove any common leading whitespace from every line in text.

This can be used to make triple-quoted strings line up with the left edge of the display, while still presenting them in the source code in indented form.

Note that tabs and spaces are both treated as whitespace, but they are not equal: the lines hello and \thello are considered to have no common leading whitespace.

example

ends_with

method: ends_with(haystack, needle, beg=0, end=None)

custom implementation / needs to be installed

Checks whether the string ends with needle at position (default: haystack.length).

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escape_html

method: escape_html(string)

custom implementation / needs to be installed

Converts HTML special characters to their entity equivalents. This function supports cent, yen, euro, pound, lt, gt, copy, reg, quote, amp, apos.

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humanize

method: humanize(string)

custom implementation / needs to be installed

Converts an underscored, camelized, or dasherized string into a humanized one. Also removes beginning and ending whitespace, and removes the postfix '_id'.

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includes

method: includes(haystack, needle)

custom implementation / needs to be installed

Tests if string contains a substring.

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insert

method: insert(string, index, substring)

custom implementation / needs to be installed

Insert word in string at the defined position.

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lpad

method: lpad(width[, fillchar])

custom implementation / needs to be installed

Using Python Standard Library string rjust

Return the string left justified in a string of length width. Padding is done using the specified fillchar (default is a space). The original string is returned if width is less than or equal to len(s).

example

ltrim

method: lpad(width[, fillchar])

custom implementation / needs to be installed

Using Python Standard Library string lstrip

Return a copy of the string with leading characters removed. The chars argument is a string specifying the set of characters to be removed. If omitted or None, the chars argument defaults to removing whitespace.

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repeat

method: repeat(string, count, separator=None)

custom implementation / needs to be installed

Repeats a string count times, can be seperated by separator.

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rpad

method: rpad(string, width, fillchar=' ')

custom implementation / needs to be installed

Return the string right justified in a string of length width.

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rtrim

method: rtrim(string, characters)

custom implementation / needs to be installed

Using Python Standard Library string rstrip

Return a copy of the string with trailing characters removed. If chars is omitted or None, whitespace characters are removed. If given and not None, chars must be a string; the characters in the string will be stripped from the end of the string this method is called on.

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splice

method: splice(string, index, howmany, substring)

custom implementation / needs to be installed

Adds/removes substring to/from string.

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starts_with

method: starts_with(haystack, needle, beg=0, end=None)

custom implementation / needs to be installed

Using Python Standard Library string startswith

Return True if string starts with the prefix, otherwise return False. prefix can also be a tuple of prefixes to look for. With optional start, test string beginning at that position. With optional end, stop comparing string at that position.

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