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Commit 872faf2

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counting snippets
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Lines changed: 27 additions & 0 deletions
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---
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title: Count Character Frequency
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description: Counts the frequency of each character in a string
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author: Mcbencrafter
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tags: string,character,frequency,character-frequency
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---
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```java
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public static Map<Character, Integer> characterFrequency(String text, boolean countSpaces, boolean caseSensitive) {
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Map<Character, Integer> frequencyMap = new HashMap<>();
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for (char character : text.toCharArray()) {
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if (character == ' ' && !countSpaces)
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continue;
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if (!caseSensitive)
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character = Character.toLowerCase(character);
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frequencyMap.put(character, frequencyMap.getOrDefault(character, 0) + 1);
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}
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return frequencyMap;
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}
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// Usage:
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System.out.println(characterFrequency("hello world", false, false)); // {r=1, d=1, e=1, w=1, h=1, l=3, o=2}
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```
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---
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title: Count Consonants
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description: Counts the consonants (every character except for a, e, i, o, u) in a string
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author: Mcbencrafter
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tags: string,consonants,counter
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---
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```java
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public static int countConsonants(String text) {
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String consonants = "bcdfghjklmnpqrstvwxyz";
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int count = 0;
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for (char character : text.toLowerCase().toCharArray()) {
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if (consonants.indexOf(character) == -1)
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continue;
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count++;
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}
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return count;
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}
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// Usage:
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System.out.println(countConsonants("hello world")); // 7
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```
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---
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title: Count Vowels
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description: Counts the vowels (a, e, i, o, u) in a string
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author: Mcbencrafter
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tags: string,vowels,counter
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---
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```java
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public static int countVowels(String text) {
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String vowels = "aeiou";
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int count = 0;
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for (char character : text.toLowerCase().toCharArray()) {
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if (vowels.indexOf(character) == -1)
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continue;
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count++;
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}
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return count;
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}
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// Usage:
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System.out.println(countVowels("hello world")); // 3
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```
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---
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title: Count Words
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description: Counts the number of words in a string
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author: Mcbencrafter
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tags: string,word,count
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---
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```java
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public static int countWords(String text) {
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return text.split("\\s+").length;
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}
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// Usage:
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System.out.println(countWords("hello world")); // 2
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```

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