{"id":415,"date":"2020-02-15T11:40:19","date_gmt":"2020-02-15T11:40:19","guid":{"rendered":"https:\/\/www.samarthya.me\/wps\/?p=415"},"modified":"2020-12-31T06:57:21","modified_gmt":"2020-12-31T06:57:21","slug":"package-string","status":"publish","type":"post","link":"https:\/\/blog.samarthya.me\/wps\/2020\/02\/15\/package-string\/","title":{"rendered":"Package String"},"content":{"rendered":"\n

Just like Java or C++ there are standard libraries (packages) available with golang. The one that you might end up using the most often is strings<\/code>. <\/p>\n\n\n\n

For this blog, I was writing another practice exercise<\/a> that is meant to count number of words in an input string.<\/p>\n\n\n\n

Go string is a sequence of variable-width characters (each 1 to 4 bytes).<\/p><\/blockquote><\/figure>\n\n\n\n

Definition of Word<\/h2>\n\n\n\n
  1. A number<\/em> composed of one or more ASCII digits (ie “0” or “1234”) OR<\/li>
  2. A simple word<\/em> composed of one or more ASCII letters (ie “a” or “they”) OR<\/li>
  3. A contraction<\/em> of two simple words<\/em> joined by a single apostrophe (ie “it’s” or “they’re”)<\/li><\/ol>\n\n\n\n

    Package : Strings<\/h2>\n\n\n\n

    The package string exposes utility functions to manipulate UTF-8 encoded strings.<\/p>\n\n\n\n

    \n
    \"\"<\/figure><\/div>\n\n\n\n

    Strings are value types and immutable, which means that once created, you cannot modify the contents of the string. In other words, strings are immutable arrays of bytes.<\/p>\u2014 Official GoDocs<\/cite><\/blockquote>\n\n\n\n

    \n<\/div><\/div>\n\n\n\n

    Solution<\/h2>\n\n\n\n
    package wordcount\n\nimport (\n    \"strings\"\n    \"unicode\"\n)\n\n\/\/ Frequency of the words\ntype Frequency map[string]int\n\n\/\/ WordCount Count the words occurrence.\nfunc WordCount(in string) Frequency {\n    var myMap Frequency = make(map[string]int, 0)\n\n    in = strings.ToLower(in)\n    inStrings := strings.FieldsFunc(in, func(c rune) bool {\n        return c == ' ' || c == '\\n' || c == '\\t' || c == ','\n    })\n\n    for _, val := range inStrings {\n        val = strings.TrimFunc(val, func(r rune) bool {\n            return !unicode.IsLetter(r) && !unicode.IsDigit(r)\n        })\n        myMap[val]++\n    }\n    return myMap\n}<\/code><\/pre>\n\n\n\n
    <\/div><\/div>\n\n\n\n
    Functions used<\/h2>\n\n\n\n