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20 Cards in this Set
- Front
- Back
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What is the difference between print & puts? |
print does not include a newline character at the end of the string |
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Symbol to syphon program output into a file? |
> |
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Syntax to write to a text file? |
File.open fileName, 'mode' do |f| f.write textObject end |
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Syntax to load a text file?
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objectName = File.read fileName |
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Syntax to search a directory for filenames that match a RegExp? |
Dir[RegExp] |
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Syntax for string interpolation? |
#{variableName/expression} |
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What file format is commonly used to store objects?
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YAML |
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What syntax is required to include the YAML module? |
require 'yaml' |
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syntax to write an object to YAML? |
stringName=objectName.to_yaml name=fileName File.open name, 'mode' do |f| f.write stringName end (as for text file, except first line added) |
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syntax to load a YAML file? |
readString=File.read fileName object=YAML::load readString |
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Class names always begin with a...? |
capital letter |
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method to create a new instance of a class object? |
className.new |
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syntax to create a new object representing the current point in time? |
Time.new |
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syntax to create an object for an arbitrary point in time? |
Time.local(y, m, d, [h], [m]...) |
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method to return the name of the class to which an object belongs? |
object.class |
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What syntax is used for instance variables in the class method definitions? |
@variableName |
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Syntax used to represent a global variable name? |
$ |
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What is a Block? |
A process that sits between {} / do...end |
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What is a proc? |
An object housing a Block |
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How to call a proc in a method? |
proc.call |
