conn.exec("DELETE FROM test_define"); conn.exec("INSERT INTO test_define VALUES(1,'Scott Tiger', SYSDATE, SYSTIMESTAMP)") # Define to fetch Date and Time cursor = conn.parse("SELECT name,birthdate,lastvisit FROM test_define WHERE id = :id") cursor.bind_param(1, 1) cursor.define(...
b = foo # +- nd_value (rhsn): # | @ NODE_ARRAY (line: 2) # | | # ...
example, the Array and Hash classes both define methods named empty? that test whether the data structure has any elements. An exclamation mark at the end of a method name is used to indicate that caution is required with the use of the method. A number of core Ruby classes define pairs ...
mystuff = %w{tivo nokia ipaq}# make a string array inspect To look at contents of an object use the "inspect" method. Even more convenient is to use "p" as a shorthand for "puts obj.inspect" 1 2 3 4 myarray = [1,2,5,7,11] puts myarray puts myarray.inspect p myarray Produ...
Use SCREAMING_SNAKE_CASE for other constants.[link] The names of predicate methods (methods that return a boolean value) should end in a question mark. (i.e. Array#empty?).[link] The names of potentially "dangerous" methods (i.e. methods that modify self or the arguments, exit!, etc...
Also, make sure your upload controller permits the multiple file upload attribute, pointing to an empty array in a hash. For example:params.require(:user).permit(:email, :first_name, :last_name, {avatars: []})Now you can select multiple files in the upload dialog (e.g. SHIFT+SELECT)...
Array.instance_methods.grep /\?/ # => [:include?, :any?, :empty?, :eql?, :frozen?, :all?, :one?, :none?, # :member?, :instance_of?, :instance_variable_defined?, :kind_of?, :is_a?, # :respond_to?, :nil?, :tainted?, :untrusted?, :equal?] Array.instance_methods.grep...
def testArray(*args) puts args end def testHash(**kargs) puts kargs end t1 = [1,2,3,4] testArray(t1) t2 = {:a=>1,:b=>2} testHash(**t2) testHash(:c=>3,:d=>4) 9、一段code def self.from_json_file(filepath)
(test.html beside main.rb) From the Ruby side I want to send an array (with two string in it). So I’m converting the array to json Then I’m sending it after the html loaded. (1 sec Timer for now) What is strange for me it is “arriving” to JavaScript as Array (according ...
for a in array "code" end times 3.times "code" #=>0,1,2 each data.each{|x| puts x} map [1,2,3,4].map {|x| puts x} upto/downto 4.upto(7) { |x| print x} #=> 4567 inject sum = data.inject {|result , x| x +result} #=> 10 yield ...