Java Utililty Methods Number Sum

List of utility methods to do Number Sum

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Description

The list of methods to do Number Sum are organized into topic(s).

Method

intsumHash(int hash, String element)
sum Hash 
return hash * 31 + element.hashCode();
intsumHash(int leftHash, int rightHash)
Sums the hash of the left and the right children

May be used only when calculating a non-leaf node's hash code from its children's hashes. 

return leftHash + rightHash;
intsumIf(final Integer number, final Integer sum, final Boolean condition)
sum If 
int result = number != null ? number : 0;
if (Boolean.TRUE.equals(condition) && sum != null) {
    result += sum;
return result;
booleansumIsMod10(int sum)
sum Is Mod 
return ((sum % 10) == 0);
intsumLange(int _a, int _b)
sum Lange 
int a = _a;
int b = _b;
if (_a > _b) {
    b = _a;
    a = _b;
return (a + b) * (b - a + 1) / 2;
doublesumLogProb(double a, double b)
Returns Math.log(Math.exp(a) + Math.exp(b)). 
if (a == Double.NEGATIVE_INFINITY) {
    if (b == Double.NEGATIVE_INFINITY)
        return Double.NEGATIVE_INFINITY;
    return b;
} else if (b == Double.NEGATIVE_INFINITY)
    return a;
else if (a > b)
    return a + Math.log(1 + Math.exp(b - a));
...
Stringsummarize(String longString, int limit)
summarize 
String s = longString;
if (s.indexOf("<p>") > -1)
    s = s.substring(0, s.indexOf("<p>"));
if (s.indexOf("\n") > -1)
    s = s.substring(0, s.indexOf("\n"));
return s.length() > limit ? s.substring(0, limit) + "..." : s;
StringsummarizeCigarString(String cigarString)
summarize Cigar String 
StringBuilder summarizedCigarString = new StringBuilder();
if (cigarString.length() > 0) {
    int numberOfRepeats = 1;
    char currentlyRepeatingChar = cigarString.charAt(0);
    for (int i = 1; i < cigarString.length(); i++) {
        char currentChar = cigarString.charAt(i);
        if (currentlyRepeatingChar == currentChar) {
            numberOfRepeats++;
...
Stringsummary(String text)
summary 
if (text == null) {
    return "null";
return text.substring(0, Math.min(10, text.length()));
intsummatory(int value)
Summatory. 
int summatoryValue = 0;
for (int i = 0; i <= value; i++)
    summatoryValue += i;
return summatoryValue;