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Re:Ruby basics (1 viewing) (1) Guest
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TOPIC: Re:Ruby basics
#4451
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
array.compact

Returns a copy of self with all nil elements removed.

array.compact!

Removes nil elements from array. Returns nil if no changes were made.
 
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#4452
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
array.delete_at(index)

Deletes the element at the specified index, returning that element, or nil if the index is out of range.

array.delete_if { |item| block }

Deletes every element of self for which block evaluates to true.
 
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#4453
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
array.each { |item| block }

Calls block once for each element in self, passing that element as a parameter.

array.each_index { |index| block }


Same as Array#each, but passes the index of the element instead of the element itself.
 
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#4454
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
array.first [or] array.first(n)

Returns the first element, or the first n elements, of the array. If the array is empty, the first form returns nil, and the second form returns an empty array.
 
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#4455
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
array.flatten

Returns a new array that is a one-dimensional flattening of this array (recursively).

array.flatten!

Flattens array in place. Returns nil if no modifications were made. (array contains no subarrays.)
 
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ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
array.hash

Compute a hash-code for array. Two arrays with the same content will have the same hash code

array.include?(obj)

Returns true if obj is present in self, false otherwise.

array.index(obj)

Returns the index of the first object in self that is == to obj. Returns nil if no match is found.
 
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