Module: TensorStream::StringHelper

Included in:
EvaluatorUtils, GraphBuilder, Pbtext, Session, Trainer, Yaml
Defined in:
lib/tensor_stream/helpers/string_helper.rb

Overview

helper string methods usually found in ActiveSupport but need to replicate here since we don’t want to use ActiveSupport

Instance Method Summary collapse

Instance Method Details

#camelize(string, uppercase_first_letter = true) ⇒ Object 



5
6
7
8
9
10
11
12
 
# File 'lib/tensor_stream/helpers/string_helper.rb', line 5

def camelize(string, uppercase_first_letter = true)
  string = if uppercase_first_letter
    string.sub(/^[a-z\d]*/) { $&.capitalize }
  else
    string.sub(/^(?:(?=\b|[A-Z_])|\w)/) { $&.downcase }
  end
  string.gsub(/(?:_|(\/))([a-z\d]*)/) { "#{$1}#{$2.capitalize}" }.gsub("/", "::")
end

#constantize(camel_cased_word) ⇒ Object 



27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
 
# File 'lib/tensor_stream/helpers/string_helper.rb', line 27

def constantize(camel_cased_word)
  names = camel_cased_word.split("::")

  # Trigger a built-in NameError exception including the ill-formed constant in the message.
  Object.const_get(camel_cased_word) if names.empty?

  # Remove the first blank element in case of '::ClassName' notation.
  names.shift if names.size > 1 && names.first.empty?

  names.inject(Object) do |constant, name|
    if constant == Object
      constant.const_get(name)
    else
      candidate = constant.const_get(name)
      next candidate if constant.const_defined?(name, false)
      next candidate unless Object.const_defined?(name)

      # Go down the ancestors to check if it is owned directly. The check
      # stops when we reach Object or the end of ancestors tree.
      constant = constant.ancestors.inject { |const, ancestor|
        break const    if ancestor == Object
        break ancestor if ancestor.const_defined?(name, false)
        const
      }

      # owner is in Object, so raise
      constant.const_get(name, false)
    end
  end
end

#symbolize_keys(hash) ⇒ Object 



21
22
23
24
25
 
# File 'lib/tensor_stream/helpers/string_helper.rb', line 21

def symbolize_keys(hash)
  hash.map { |k, v|
    [k.to_sym, v]
  }.to_h
end

#underscore(string) ⇒ Object 



14
15
16
17
18
19
 
# File 'lib/tensor_stream/helpers/string_helper.rb', line 14

def underscore(string)
  string.gsub(/::/, "/").
    gsub(/([A-Z]+)([A-Z][a-z])/, '\1_\2').
    gsub(/([a-z\d])([A-Z])/, '\1_\2').
    tr("-", "_").downcase
end