Results for: "tally"

Reline::Unicode::em_forward_word_with_capitalization

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Array#initialize_copy

Replaces the content of self with the content of other_array; returns self:

a = [:foo, 'bar', 2]
a.replace(['foo', :bar, 3]) # => ["foo", :bar, 3]

Array#values_at

Returns a new Array whose elements are the elements of self at the given Integer or Range indexes.

For each positive index, returns the element at offset index:

a = [:foo, 'bar', 2]
a.values_at(0, 2) # => [:foo, 2]
a.values_at(0..1) # => [:foo, "bar"]

The given indexes may be in any order, and may repeat:

a = [:foo, 'bar', 2]
a.values_at(2, 0, 1, 0, 2) # => [2, :foo, "bar", :foo, 2]
a.values_at(1, 0..2) # => ["bar", :foo, "bar", 2]

Assigns nil for an index that is too large:

a = [:foo, 'bar', 2]
a.values_at(0, 3, 1, 3) # => [:foo, nil, "bar", nil]

Returns a new empty Array if no arguments given.

For each negative index, counts backward from the end of the array:

a = [:foo, 'bar', 2]
a.values_at(-1, -3) # => [2, :foo]

Assigns nil for an index that is too small:

a = [:foo, 'bar', 2]
a.values_at(0, -5, 1, -6, 2) # => [:foo, nil, "bar", nil, 2]

The given indexes may have a mixture of signs:

a = [:foo, 'bar', 2]
a.values_at(0, -2, 1, -1) # => [:foo, "bar", "bar", 2]

Array#repeated_permutation

Calls the block with each repeated permutation of length n of the elements of self; each permutation is an Array; returns self. The order of the permutations is indeterminate.

When a block and a positive Integer argument n are given, calls the block with each n-tuple repeated permutation of the elements of self. The number of permutations is self.size**n.

n = 1:

a = [0, 1, 2]
a.repeated_permutation(1) {|permutation| p permutation }

Output:

[0]
[1]
[2]

n = 2:

a.repeated_permutation(2) {|permutation| p permutation }

Output:

[0, 0]
[0, 1]
[0, 2]
[1, 0]
[1, 1]
[1, 2]
[2, 0]
[2, 1]
[2, 2]

If n is zero, calls the block once with an empty Array.

If n is negative, does not call the block:

a.repeated_permutation(-1) {|permutation| fail 'Cannot happen' }

Returns a new Enumerator if no block given:

a = [0, 1, 2]
a.repeated_permutation(2) # => #<Enumerator: [0, 1, 2]:permutation(2)>

Using Enumerators, it’s convenient to show the permutations and counts for some values of n:

e = a.repeated_permutation(0)
e.size # => 1
e.to_a # => [[]]
e = a.repeated_permutation(1)
e.size # => 3
e.to_a # => [[0], [1], [2]]
e = a.repeated_permutation(2)
e.size # => 9
e.to_a # => [[0, 0], [0, 1], [0, 2], [1, 0], [1, 1], [1, 2], [2, 0], [2, 1], [2, 2]]

Array#take_while

Returns a new Array containing zero or more leading elements of self; does not modify self.

With a block given, calls the block with each successive element of self; stops if the block returns false or nil; returns a new Array containing those elements for which the block returned a truthy value:

a = [0, 1, 2, 3, 4, 5]
a.take_while {|element| element < 3 } # => [0, 1, 2]
a.take_while {|element| true } # => [0, 1, 2, 3, 4, 5]
a # => [0, 1, 2, 3, 4, 5]

With no block given, returns a new Enumerator:

[0, 1].take_while # => #<Enumerator: [0, 1]:take_while>

String#initialize_copy

Replaces the contents of self with the contents of other_string:

s = 'foo'        # => "foo"
s.replace('bar') # => "bar"

String#start_with?

Returns whether self starts with any of the given string_or_regexp.

Matches patterns against the beginning of self. For each given string_or_regexp, the pattern is:

string_or_regexp itself, if it is a Regexp.
Regexp.quote(string_or_regexp), if string_or_regexp is a string.

Returns true if any pattern matches the beginning, false otherwise:

'hello'.start_with?('hell')               # => true
'hello'.start_with?(/H/i)                 # => true
'hello'.start_with?('heaven', 'hell')     # => true
'hello'.start_with?('heaven', 'paradise') # => false
'тест'.start_with?('т')                   # => true
'こんにちは'.start_with?('こ')              # => true

Related: String#end_with?.

String#valid_encoding?

Returns true if self is encoded correctly, false otherwise:

"\xc2\xa1".force_encoding("UTF-8").valid_encoding? # => true
"\xc2".force_encoding("UTF-8").valid_encoding?     # => false
"\x80".force_encoding("UTF-8").valid_encoding?     # => false

String#ascii_only?

Returns true if self contains only ASCII characters, false otherwise:

'abc'.ascii_only?         # => true
"abc\u{6666}".ascii_only? # => false

String#unicode_normalize

Returns a copy of self with Unicode normalization applied.

Argument form must be one of the following symbols (see Unicode normalization forms):

:nfc: Canonical decomposition, followed by canonical composition.
:nfd: Canonical decomposition.
:nfkc: Compatibility decomposition, followed by canonical composition.
:nfkd: Compatibility decomposition.

The encoding of self must be one of:

Encoding::UTF_8
Encoding::UTF_16BE
Encoding::UTF_16LE
Encoding::UTF_32BE
Encoding::UTF_32LE
Encoding::GB18030
Encoding::UCS_2BE
Encoding::UCS_4BE

Examples:

"a\u0300".unicode_normalize      # => "a"
"\u00E0".unicode_normalize(:nfd) # => "a "