Contractions.R

  # Function to expand contractions and convert numbers to "num" ----- 
  # Loop only used to control memory/progress
  expand_contraction = function (text) { 
    text %<>% str_replace_all(pattern = "[`''']",replacement = "'" ) 
    text %<>% tolower()
    text %<>% str_replace_all(pattern = "\\b\\w*\\d,*\\.*\\w*,*\\.*\\b", replacement = "num") # the real regex is \b\w*\d,*\.*\w*,*\.*\b
    text %<>% str_replace_all(pattern = "\\b(num)\\W*\\S*(num)\\b", replacement = "num")
    {for (i in (seq_along(contrac_repl)))
      text %<>% str_replace_all(pattern = tolower(names(contrac_repl))[i] ,replacement = tolower(contrac_repl[i]))
    }
    # after the contractions, replace the any 's after the word 
    text %<>% str_replace_all("'s","")
    return(text)
  }



# Contraction list
    contraction    expanded
1        'cause     because
2          'tis       it is
3         'twas      it was
4         ain't      am not
5        aren't     are not
6         can't     can not
7      could've  could have
8      couldn't   could not
9        didn't     did not
10      doesn't    does not
11        don't      do not
12       hasn't     has not
13         he'd    he would
14        he'll     he will
15         he's       he is
16        how'd     how did
17       how'll    how will
18        how's      how is
19          I'd     I would
20         I'll      I will
21          I'm        I am
22         I've      I have
23        isn't      is not
24        it'll     it will
25         it's       it is
26        let's      let us
27     might've  might have
28     mightn't   might not
29      must've   must have
30      mustn't    must not
31       shan't   shall not
32        she'd   she would
33       she'll    she will
34        she's      she is
35    should've should have
36    shouldn't  should not
37      that'll   that will
38       that's     that is
39     there'll  there will
40      there's    there is
41       they'd  they would
42      they'll   they will
43      they're    they are
44      they've   they have
45       wasn't     was not
46         we'd    we would
47        we'll     we will
48        we're      we are
49        we've     we have
50      weren't    were not
51       what's     what is
52       what'd    what did
53       when'd    when did
54      when'll   when will
55       when's     when is
56     where'll  where will
57      where's    where is
58        who'd   who would
59       who'll    who will
60        who's      who is
61        why'd     why did
62       why'll    why will
63        why's      why is
64        won't    will not
65     would've  would have
66     wouldn't   would not
67        you'd   you would
68       you'll    you will
69       you're     you are
70       you've    you have
71        cause     because
72          tis       it is
73         twas      it was
74         aint      am not
75        arent     are not
76         cant     can not
77      couldve  could have
78      couldnt   could not
79        didnt     did not
80       doesnt    does not
81         dont      do not
82        hasnt     has not
83          hed    he would
84         hell     he will
85          hes       he is
86         howd     how did
87        howll    how will
88         hows      how is
89           Id     I would
90          Ill      I will
91           Im        I am
92          Ive      I have
93         isnt      is not
94         itll     it will
95         lets      let us
96      mightve  might have
97      mightnt   might not
98       mustve   must have
99       mustnt    must not
100       shant   shall not
101        shed   she would
102       shell    she will
103        shes      she is
104    shouldve should have
105    shouldnt  should not
106      thatll   that will
107       thats     that is
108     therell  there will
109      theres    there is
110       theyd  they would
111      theyll   they will
112      theyre    they are
113      theyve   they have
114       wasnt     was not
115         wed    we would
116        well     we will
117        were      we are
118        weve     we have
119      werent    were not
120       whats     what is
121       whatd    what did
122       whend    when did
123      whenll   when will
124       whens     when is
125     wherell  where will
126      wheres    where is
127        whod   who would
128       wholl    who will
129        whos      who is
130        whyd     why did
131       whyll    why will
132        whys      why is
133        wont    will not
134     wouldve  would have
135     wouldnt   would not
136        youd   you would
137       youll    you will
138       youre     you are
139       youve    you have