'#!/usr/bin/env kal' Comment.Single
'\n'          Text.Whitespace

'\n'          Text.Whitespace

'# This demo executes GET requests in parallel and in series' Comment.Single
'\n'          Text.Whitespace

'# using `for` loops and `wait for` statements.' Comment.Single
'\n'          Text.Whitespace

'\n'          Text.Whitespace

'# Notice how the serial GET requests always return in order' Comment.Single
'\n'          Text.Whitespace

'# and take longer in total. Parallel requests come back in' Comment.Single
'\n'          Text.Whitespace

'# order of receipt.' Comment.Single
'\n'          Text.Whitespace

'\n'          Text.Whitespace

'http'        Name.Variable
' '           Text.Whitespace
'='           Operator
' '           Text.Whitespace
'require'     Name.Variable
' '           Text.Whitespace
"'"           Literal.String
'http'        Literal.String
"'"           Literal.String
'\n\n'        Text.Whitespace

'urls'        Name.Variable
' '           Text.Whitespace
'='           Operator
' '           Text.Whitespace
'['           Punctuation
"'"           Literal.String
'http://www.google.com' Literal.String
"'"           Literal.String
'\n        '  Text.Whitespace
"'"           Literal.String
'http://www.apple.com' Literal.String
"'"           Literal.String
'\n        '  Text.Whitespace
"'"           Literal.String
'http://www.microsoft.com' Literal.String
"'"           Literal.String
'\n        '  Text.Whitespace
"'"           Literal.String
'http://www.nodejs.org' Literal.String
"'"           Literal.String
'\n        '  Text.Whitespace
"'"           Literal.String
'http://www.yahoo.com' Literal.String
"'"           Literal.String
']'           Punctuation
'\n\n'        Text.Whitespace

'# This function does a GET request for each URL in series' Comment.Single
'\n'          Text.Whitespace

'# It will wait for a response from each request before moving on' Comment.Single
'\n'          Text.Whitespace

'# to the next request. Notice the output will be in the same order as the' Comment.Single
'\n'          Text.Whitespace

'# urls variable every time regardless of response time.' Comment.Single
'\n'          Text.Whitespace

'# It is a task rather than a function because it is called asynchronously' Comment.Single
'\n'          Text.Whitespace

'# This allows us to use `return` to implicitly call back' Comment.Single
'\n'          Text.Whitespace

'task'        Keyword.Declaration
' '           Text.Whitespace
'series_demo' Name.Function
'('           Punctuation
')'           Punctuation
'\n  '        Text.Whitespace
'# The `series` keyword is optional here (for loops are serial by default)' Comment.Single
'\n'          Text.Whitespace

'  '          Text.Whitespace
'total_time'  Name.Variable
' '           Text.Whitespace
'='           Operator
' '           Text.Whitespace
'0'           Literal.Number.Integer
'\n\n  '      Text.Whitespace
'for'         Keyword
' '           Text.Whitespace
'series'      Keyword
' '           Text.Whitespace
'url'         Name.Variable
' '           Text.Whitespace
'in'          Keyword
' '           Text.Whitespace
'urls'        Name.Variable
'\n    '      Text.Whitespace
'timer'       Name.Variable
' '           Text.Whitespace
'='           Operator
' '           Text.Whitespace
'new'         Keyword
' '           Text.Whitespace
'Date'        Name.Builtin
'\n\n    '    Text.Whitespace
'# we use the `safe` keyword because get is a "nonstandard" task' Comment.Single
'\n'          Text.Whitespace

'    '        Text.Whitespace
'# that does not call back with an error argument' Comment.Single
'\n'          Text.Whitespace

'    '        Text.Whitespace
'safe'        Keyword
' '           Text.Whitespace
'wait'        Keyword
' '           Text.Whitespace
'for'         Keyword
' '           Text.Whitespace
'response'    Name.Variable
' '           Text.Whitespace
'from'        Keyword
' '           Text.Whitespace
'http.get'    Name.Variable
' '           Text.Whitespace
'url'         Name.Variable
'\n\n    '    Text.Whitespace
'delay'       Name.Variable
' '           Text.Whitespace
'='           Operator
' '           Text.Whitespace
'new'         Keyword
' '           Text.Whitespace
'Date'        Name.Builtin
'('           Punctuation
')'           Punctuation
' '           Text.Whitespace
'-'           Operator
' '           Text.Whitespace
'timer'       Name.Variable
'\n    '      Text.Whitespace
'total_time'  Name.Variable
' '           Text.Whitespace
'+='          Operator
' '           Text.Whitespace
'delay'       Name.Variable
'\n\n    '    Text.Whitespace
'print'       Name.Builtin
' '           Text.Whitespace
'"'           Literal.String
'GET '        Literal.String
'#{'          Literal.String.Interpol
'url'         Name.Variable
'}'           Literal.String.Interpol
' - '         Literal.String
'#{'          Literal.String.Interpol
'response.statusCode' Name.Variable
'}'           Literal.String.Interpol
' - '         Literal.String
'#{'          Literal.String.Interpol
'response.connection.bytesRead' Name.Variable
'}'           Literal.String.Interpol
' bytes - '   Literal.String
'#{'          Literal.String.Interpol
'delay'       Name.Variable
'}'           Literal.String.Interpol
' ms'         Literal.String
'"'           Literal.String
'\n'          Text.Whitespace

'\n  '        Text.Whitespace
'# because we are in a task rather than a function, this actually exectutes a callback' Comment.Single
'\n'          Text.Whitespace

'  '          Text.Whitespace
'return'      Keyword
' '           Text.Whitespace
'total_time'  Name.Variable
'\n\n'        Text.Whitespace

'# This function does a GET request for each URL in parallel' Comment.Single
'\n'          Text.Whitespace

'# It will NOT wait for a response from each request before moving on' Comment.Single
'\n'          Text.Whitespace

'# to the next request. Notice the output will be determined by the order in which' Comment.Single
'\n'          Text.Whitespace

'# the requests complete!' Comment.Single
'\n'          Text.Whitespace

'task'        Keyword.Declaration
' '           Text.Whitespace
'parallel_demo' Name.Function
'('           Punctuation
')'           Punctuation
'\n  '        Text.Whitespace
'total_time'  Name.Variable
' '           Text.Whitespace
'='           Operator
' '           Text.Whitespace
'0'           Literal.Number.Integer
'\n\n  '      Text.Whitespace
'# The `parallel` keyword is only meaningful here because the loop contains' Comment.Single
'\n'          Text.Whitespace

'  '          Text.Whitespace
'# a `wait for` statement (meaning callbacks are used)' Comment.Single
'\n'          Text.Whitespace

'  '          Text.Whitespace
'for'         Keyword
' '           Text.Whitespace
'parallel'    Keyword
' '           Text.Whitespace
'url'         Name.Variable
' '           Text.Whitespace
'in'          Keyword
' '           Text.Whitespace
'urls'        Name.Variable
'\n    '      Text.Whitespace
'timer'       Name.Variable
' '           Text.Whitespace
'='           Operator
' '           Text.Whitespace
'new'         Keyword
' '           Text.Whitespace
'Date'        Name.Builtin
'\n\n    '    Text.Whitespace
'# we use the `safe` keyword because get is a "nonstandard" task' Comment.Single
'\n'          Text.Whitespace

'    '        Text.Whitespace
'# that does not call back with an error argument' Comment.Single
'\n'          Text.Whitespace

'    '        Text.Whitespace
'safe'        Keyword
' '           Text.Whitespace
'wait'        Keyword
' '           Text.Whitespace
'for'         Keyword
' '           Text.Whitespace
'response'    Name.Variable
' '           Text.Whitespace
'from'        Keyword
' '           Text.Whitespace
'http.get'    Name.Variable
' '           Text.Whitespace
'url'         Name.Variable
'\n\n    '    Text.Whitespace
'delay'       Name.Variable
' '           Text.Whitespace
'='           Operator
' '           Text.Whitespace
'new'         Keyword
' '           Text.Whitespace
'Date'        Name.Builtin
'('           Punctuation
')'           Punctuation
' '           Text.Whitespace
'-'           Operator
' '           Text.Whitespace
'timer'       Name.Variable
'\n    '      Text.Whitespace
'total_time'  Name.Variable
' '           Text.Whitespace
'+='          Operator
' '           Text.Whitespace
'delay'       Name.Variable
'\n\n    '    Text.Whitespace
'print'       Name.Builtin
' '           Text.Whitespace
'"'           Literal.String
'GET '        Literal.String
'#{'          Literal.String.Interpol
'url'         Name.Variable
'}'           Literal.String.Interpol
' - '         Literal.String
'#{'          Literal.String.Interpol
'response.statusCode' Name.Variable
'}'           Literal.String.Interpol
' - '         Literal.String
'#{'          Literal.String.Interpol
'response.connection.bytesRead' Name.Variable
'}'           Literal.String.Interpol
' bytes - '   Literal.String
'#{'          Literal.String.Interpol
'delay'       Name.Variable
'}'           Literal.String.Interpol
'ms'          Literal.String
'"'           Literal.String
'\n'          Text.Whitespace

'\n  '        Text.Whitespace
'# because we are in a task rather than a function, this actually exectutes a callback' Comment.Single
'\n'          Text.Whitespace

'  '          Text.Whitespace
'return'      Keyword
' '           Text.Whitespace
'total_time'  Name.Variable
'\n\n'        Text.Whitespace

'print'       Name.Builtin
' '           Text.Whitespace
"'"           Literal.String
'Series Requests...' Literal.String
"'"           Literal.String
'\n'          Text.Whitespace

'wait'        Keyword
' '           Text.Whitespace
'for'         Keyword
' '           Text.Whitespace
'time1'       Name.Variable
' '           Text.Whitespace
'from'        Keyword
' '           Text.Whitespace
'series_demo' Name.Variable
'('           Punctuation
')'           Punctuation
'\n'          Text.Whitespace

'print'       Name.Builtin
' '           Text.Whitespace
'"'           Literal.String
'Total duration ' Literal.String
'#{'          Literal.String.Interpol
'time1'       Name.Variable
'}'           Literal.String.Interpol
'ms'          Literal.String
'"'           Literal.String
'\n\n'        Text.Whitespace

'print'       Name.Builtin
' '           Text.Whitespace
"'"           Literal.String
"'"           Literal.String
'\n\n'        Text.Whitespace

'print'       Name.Builtin
' '           Text.Whitespace
"'"           Literal.String
'Parallel Requests...' Literal.String
"'"           Literal.String
'\n'          Text.Whitespace

'wait'        Keyword
' '           Text.Whitespace
'for'         Keyword
' '           Text.Whitespace
'time2'       Name.Variable
' '           Text.Whitespace
'from'        Keyword
' '           Text.Whitespace
'parallel_demo' Name.Variable
'('           Punctuation
')'           Punctuation
'\n'          Text.Whitespace

'print'       Name.Builtin
' '           Text.Whitespace
'"'           Literal.String
'Total duration ' Literal.String
'#{'          Literal.String.Interpol
'time2'       Name.Variable
'}'           Literal.String.Interpol
'ms'          Literal.String
'"'           Literal.String
'\n'          Text.Whitespace