Results for: "String#[]"

Sets the value of an attribute.

require "ostruct"
person = OpenStruct.new("name" => "John Smith", "age" => 70)
person[:age] = 42   # equivalent to person.age = 42
person.age          # => 42

Assigns a value to a member.

With symbol or string argument name given, assigns the given value to the named member; returns value:

Customer = Struct.new(:name, :address, :zip)
joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
joe[:zip] = 54321 # => 54321
joe # => #<struct Customer name="Joe Smith", address="123 Maple, Anytown NC", zip=54321>

Raises NameError if name is not the name of a member.

With integer argument n given, assigns the given value to the n-th member if n is in range; see Array Indexes at Array:

joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
joe[2] = 54321           # => 54321
joe[-3] = 'Joseph Smith' # => "Joseph Smith"
joe # => #<struct Customer name="Joseph Smith", address="123 Maple, Anytown NC", zip=54321>

Raises IndexError if n is out of range.

Sets the value to WIN32OLE object specified by a1, a2, …

dict = WIN32OLE.new('Scripting.Dictionary')
dict.add('ruby', 'RUBY')
dict['ruby'] = 'Ruby'
puts dict['ruby'] # => 'Ruby'

Remark: You can not use this method to set the property value.

excel = WIN32OLE.new('Excel.Application')
# excel['Visible'] = true # This is error !!!
excel.Visible = true # You should to use this style to set the property.

Hash#store is an alias for Hash#[]=.

Associates the given value with the given key; returns value.

If the given key exists, replaces its value with the given value; the ordering is not affected (see Entry Order):

h = {foo: 0, bar: 1}
h[:foo] = 2 # => 2
h.store(:bar, 3) # => 3
h # => {:foo=>2, :bar=>3}

If key does not exist, adds the key and value; the new entry is last in the order (see Entry Order):

h = {foo: 0, bar: 1}
h[:baz] = 2 # => 2
h.store(:bat, 3) # => 3
h # => {:foo=>0, :bar=>1, :baz=>2, :bat=>3}

ENV.store is an alias for ENV.[]=.

Creates, updates, or deletes the named environment variable, returning the value. Both name and value may be instances of String. See Valid Names and Values.

• If the named environment variable does not exist:

  • If value is nil, does nothing.

    ENV.clear
    ENV['foo'] = nil # => nil
    ENV.include?('foo') # => false
    ENV.store('bar', nil) # => nil
    ENV.include?('bar') # => false
    

  • If value is not nil, creates the environment variable with name and value:

    # Create 'foo' using ENV.[]=.
    ENV['foo'] = '0' # => '0'
    ENV['foo'] # => '0'
    # Create 'bar' using ENV.store.
    ENV.store('bar', '1') # => '1'
    ENV['bar'] # => '1'
    

• If the named environment variable exists:

  • If value is not nil, updates the environment variable with value value:

    # Update 'foo' using ENV.[]=.
    ENV['foo'] = '2' # => '2'
    ENV['foo'] # => '2'
    # Update 'bar' using ENV.store.
    ENV.store('bar', '3') # => '3'
    ENV['bar'] # => '3'
    

  • If value is nil, deletes the environment variable:

    # Delete 'foo' using ENV.[]=.
    ENV['foo'] = nil # => nil
    ENV.include?('foo') # => false
    # Delete 'bar' using ENV.store.
    ENV.store('bar', nil) # => nil
    ENV.include?('bar') # => false
    

Raises an exception if name or value is invalid. See Invalid Names and Values.

Creates or replaces the value for the given key:

example_store do |store|
  temp.transaction do
    temp[:bat] = 3
  end
end

See also Hierarchical Values.

Raises an exception if called outside a transaction block.

set a value in ractor-local storage

Attribute Assignment—Sets or creates the value of a fiber-local variable, using either a symbol or a string.

See also Thread#[].

For thread-local variables, please see thread_variable_set and thread_variable_get.

Sets the warning flags for category. See Warning.[] for the categories.

Assigns the underlying string as other_string, and sets position to zero; returns other_string:

StringIO.open('foo') do |strio|
  p strio.string
  strio.string = 'bar'
  p strio.string
end

Output:

"foo"
"bar"

Related: StringIO#string (returns the underlying string).

Changes the string being scanned to str and resets the scanner. Returns str.

Set struct member name, to value val. If more arguments are specified, writes the string of bytes to the memory at the given offset and length.

Examples:

my_struct = struct(['int id']).malloc
my_struct['id'] = 1
my_struct[0, 4] = "\x01\x00\x00\x00".b
my_struct.id # => 1

Set the value at index to int.

Or, set the memory at start until length with the contents of string, the memory from dl_cptr, or the memory pointed at by the memory address addr.

Write value to a registry value named name.

If wtype is specified, the value type is it. Otherwise, the value type is depend on class of value: :Integer

REG_DWORD

:String

REG_SZ

:Array

REG_MULTI_SZ

Set the element of WIN32OLE_VARIANT object(OLE array) to val. This method is available only when the variant type of WIN32OLE_VARIANT object is VT_ARRAY.

REMARK:

The all indices should be 0 or natural number and
lower than or equal to max indices.
(This point is different with Ruby Array indices.)

obj = WIN32OLE_VARIANT.new([[1,2,3],[4,5,6]])
obj[0,0] = 7
obj[1,0] = 8
p obj.value # => [[7,2,3], [8,5,6]]
obj[2,0] = 9 # => WIN32OLERuntimeError
obj[0, -1] = 9 # => WIN32OLERuntimeError

Creates a weak reference from the given key to the given value

Set the session data for key key.

Assigns the field value for the given index or header; returns value.

Assign field value by Integer index:

source = "Name,Value\nfoo,0\nbar,1\nbaz,2\n"
table = CSV.parse(source, headers: true)
row = table[0]
row[0] = 'Bat'
row[1] = 3
row # => #<CSV::Row "Name":"Bat" "Value":3>

Counts backward from the last column if index is negative:

row[-1] = 4
row[-2] = 'Bam'
row # => #<CSV::Row "Name":"Bam" "Value":4>

Extends the row with nil:nil if positive index is not in the row:

row[4] = 5
row # => #<CSV::Row "Name":"bad" "Value":4 nil:nil nil:nil nil:5>

Raises IndexError if negative index is too small (too far from zero).

Assign field value by header (first found):

source = "Name,Name,Name\nFoo,Bar,Baz\n"
table = CSV.parse(source, headers: true)
row = table[0]
row['Name'] = 'Bat'
row # => #<CSV::Row "Name":"Bat" "Name":"Bar" "Name":"Baz">

Assign field value by header, ignoring offset leading fields:

source = "Name,Name,Name\nFoo,Bar,Baz\n"
table = CSV.parse(source, headers: true)
row = table[0]
row['Name', 2] = 4
row # => #<CSV::Row "Name":"Foo" "Name":"Bar" "Name":4>

Append new field by (new) header:

source = "Name,Value\nfoo,0\nbar,1\nbaz,2\n"
table = CSV.parse(source, headers: true)
row = table[0]
row['New'] = 6
row# => #<CSV::Row "Name":"foo" "Value":"0" "New":6>

Puts data onto the table.

Set a Row by Its Integer Index

• Form: table[n] = row, n an Integer, row a CSV::Row instance or an Array of fields.

• Access mode: :row or :col_or_row.

• Return value: row.

If the row exists, it is replaced:

source = "Name,Value\nfoo,0\nbar,1\nbaz,2\n"
table = CSV.parse(source, headers: true)
new_row = CSV::Row.new(['Name', 'Value'], ['bat', 3])
table.by_row! # => #<CSV::Table mode:row row_count:4>
return_value = table[0] = new_row
return_value.equal?(new_row) # => true # Returned the row
table[0].to_h # => {"Name"=>"bat", "Value"=>3}

With access mode :col_or_row:

table.by_col_or_row! # => #<CSV::Table mode:col_or_row row_count:4>
table[0] = CSV::Row.new(['Name', 'Value'], ['bam', 4])
table[0].to_h # => {"Name"=>"bam", "Value"=>4}

With an Array instead of a CSV::Row, inherits headers from the table:

array = ['bad', 5]
return_value = table[0] = array
return_value.equal?(array) # => true # Returned the array
table[0].to_h # => {"Name"=>"bad", "Value"=>5}

If the row does not exist, extends the table by adding rows: assigns rows with nil as needed:

table.size # => 3
table[5] = ['bag', 6]
table.size # => 6
table[3] # => nil
table[4]# => nil
table[5].to_h # => {"Name"=>"bag", "Value"=>6}

Note that the nil rows are actually nil, not a row of nil fields.

Set a Column by Its Integer Index

• Form: table[n] = array_of_fields, n an Integer, array_of_fields an Array of String fields.

• Access mode: :col.

• Return value: array_of_fields.

If the column exists, it is replaced:

source = "Name,Value\nfoo,0\nbar,1\nbaz,2\n"
table = CSV.parse(source, headers: true)
new_col = [3, 4, 5]
table.by_col! # => #<CSV::Table mode:col row_count:4>
return_value = table[1] = new_col
return_value.equal?(new_col) # => true # Returned the column
table[1] # => [3, 4, 5]
# The rows, as revised:
table.by_row! # => #<CSV::Table mode:row row_count:4>
table[0].to_h # => {"Name"=>"foo", "Value"=>3}
table[1].to_h # => {"Name"=>"bar", "Value"=>4}
table[2].to_h # => {"Name"=>"baz", "Value"=>5}
table.by_col! # => #<CSV::Table mode:col row_count:4>

If there are too few values, fills with nil values:

table[1] = [0]
table[1] # => [0, nil, nil]

If there are too many values, ignores the extra values:

table[1] = [0, 1, 2, 3, 4]
table[1] # => [0, 1, 2]

If a single value is given, replaces all fields in the column with that value:

table[1] = 'bat'
table[1] # => ["bat", "bat", "bat"]

Set a Column by Its String Header

• Form: table[header] = field_or_array_of_fields, header a String header, field_or_array_of_fields a field value or an Array of String fields.

• Access mode: :col or :col_or_row.

• Return value: field_or_array_of_fields.

If the column exists, it is replaced:

source = "Name,Value\nfoo,0\nbar,1\nbaz,2\n"
table = CSV.parse(source, headers: true)
new_col = [3, 4, 5]
table.by_col! # => #<CSV::Table mode:col row_count:4>
return_value = table['Value'] = new_col
return_value.equal?(new_col) # => true # Returned the column
table['Value'] # => [3, 4, 5]
# The rows, as revised:
table.by_row! # => #<CSV::Table mode:row row_count:4>
table[0].to_h # => {"Name"=>"foo", "Value"=>3}
table[1].to_h # => {"Name"=>"bar", "Value"=>4}
table[2].to_h # => {"Name"=>"baz", "Value"=>5}
table.by_col! # => #<CSV::Table mode:col row_count:4>

If there are too few values, fills with nil values:

table['Value'] = [0]
table['Value'] # => [0, nil, nil]

If there are too many values, ignores the extra values:

table['Value'] = [0, 1, 2, 3, 4]
table['Value'] # => [0, 1, 2]

If the column does not exist, extends the table by adding columns:

table['Note'] = ['x', 'y', 'z']
table['Note'] # => ["x", "y", "z"]
# The rows, as revised:
table.by_row!
table[0].to_h # => {"Name"=>"foo", "Value"=>0, "Note"=>"x"}
table[1].to_h # => {"Name"=>"bar", "Value"=>1, "Note"=>"y"}
table[2].to_h # => {"Name"=>"baz", "Value"=>2, "Note"=>"z"}
table.by_col!

If a single value is given, replaces all fields in the column with that value:

table['Value'] = 'bat'
table['Value'] # => ["bat", "bat", "bat"]

Stores value v at key in the GW