.NET/Java PDF, Tiff, Barcode SDK Library

delete (and delete!): Removes instances of the supplied strings from the string For example: "this is a test"delete("i") == "ths s a test" downcase (and downcase!): Converts all letters in the string to lower case each_byte: Invokes the supplied code block for each byte within the string, passing in the ASCII code of the character empty : Returns true if the string is empty gsub (and gsub!): Substitutes all occurrences of the first supplied parameter (or that match a supplied regular expression) with the second supplied parameter For example: "this is a test"gsub(/[aeiou]/, "X") == "thXs Xs X tXst" gsub(exp) (and gsub!) with a following code block: Invokes the code block for each occurrence of exp (whether a String or Regexp), substituting each occurrence within the result of the code block include : Returns true if the string contains the supplied string.

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Tip If you want to iterate over a sequence in reverse, you can use the reversed function. This function doesn t return a list, though; it returns an iterator. (You learn more about iterators in 9.) You can convert the returned object with list, though:

length: Returns the length of the string lstrip (and lstrip!): Removes whitespace from the start of the string lstrip! removes the whitespace in place on the string reverse (and reverse!): Returns a reversed copy of the string (or reverses the current string in place, with reverse!) rstrip (and rstrip!): Removes whitespace from the end of the string rstrip! removes the whitespace in place on the string scan: Iterates through the string, finding each match against a supplied string or regular expression All matches are returned as an array scan(pattern): Iterates through the string, invoking the code block and passing in each match found against a supplied string or regular expression split: Splits the string into an array using a supplied pattern as a delimiter, or if none is supplied, $; See the Special Variables section of this appendix.

FIGURE 6-6 Slide Sorter view, showing the Call to Action slide with a dark gray background, the Key Point slides with medium gray backgrounds, the Explanation slides with light gray backgrounds, and the Detail slides with white backgrounds.

strip (and strip!): Removes whitespace from the start and end of the string strip! removes the whitespace in place on the string..

sub (and sub!): Substitutes only the first occurrence of the first supplied parameter (or the first match of a supplied regular expression) with the second supplied parameter. For example: "this is a test".sub(/[aeiou]/, "X") == "thXs is a test". sub(exp) (and sub!) with following code block: Invokes the code block for the first occurrence of exp (whether a String or Regexp), substituting that occurrence with the result of the code block. to_f: Attempts to return a Float representing a value depicted in the string. For example: "3.141592 is equal to pi".to_f == 3.141592. to_i: Attempts to return an integer representing a value depicted in the string. For example: "100".to_i == 100. to_sym: Converts the string into a Symbol object. upcase (and upcase!): Converts all characters into upper case.

As you scroll through the slides of the presentation in sequence, the change in color of the backgrounds from dark gray to medium gray to light gray to white indicates that you have made a transition to a new point that corresponds to Act I or the three columns in the storyboard. This transition should also be reinforced by your spoken words. Even though the shaded backgrounds are only temporary, already the contrast of the different shades of color calls attention to the three levels of hierarchy the dark gray color calls attention to the most important Call to Action slide, the medium gray to the Key Points slides, the light gray next to the Explanation slides, and the white color to the Detail slides. Stick with these backgrounds for now so that you ll be able to sketch over the backgrounds as you work in the storyboard. In 7, you ll review and sketch a range of different color backgrounds, layouts, and graphics you can use to call attention to the different levels of information, and in 8, you ll apply them to the slides in their nal form.

Regular expressions are special expressions that can be used to match patterns within strings, and were covered in depth in 3. This section provides a reference for the main elements of regular expression syntax. Regular expressions are usually represented as strings contained within forward slashes, like so:

>>> x = [1, 2, 3] >>> list(reversed(x)) [3, 2, 1]

/regular expression here/

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