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I was wondering is there a kind of algorithm or pattern which allows you to compare and find similar words
It will be easier if I use example, here it is:
Supposing that we have a strig:
String keywords = "Mummy's girl";
ArrayList = "Mom, cat, dog, girlfriend, house, mum, girls, fire";
I want to get in result those words (cause they're similar or the same in writing) = "Mom, girlfriend, mum, girls, girl"
Your question is little bit unclear. But in java you can use substring function.
String n = in.next();
String a = n.substring(0,3);
Here, a = Mum . Then go through all elements in the arraylist and find the similar word. In substring 0 is starting point and 3 is ending point.
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Given the following code
List<Person> persons = ..;
List<Person> personsWithoutAddress =
persons.stream().filter(p -> p.getAddress() == null)
.collect(Collectors.toList());
is there a way to inline use the method reference Person::getAddress in the filter ( maybe combined with Objects::isNull or with some Guava utility method...) without writing an extra utility method/Predicate ?
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I am looking for Opensource Java library which could help me in expanding all the possible values out of Numeric Regex, for example: if I give a range 1234[7-9] as input, it should output 12347,12348, 12349, similarly taking care of 123[4-6][7-9], which would translate to 12347, 12357, 12367 so on. Instead of reinventing wheel I would like to know if there are any libraries which could do this. This is only for Numeric regex with defined range.
I have once tried out Xeger which was good enough for such simple expressions similar to yours above. You will also need automaton jar package, that you can download as a library in order to use Xeger.
Example how to use:
String regex = "123[4-6][7-9]";
Xeger generator = new Xeger(regex);
Set<String> generated = new HashSet<>();
for (int i = 0; i < 100; i++) {
generated.add(generator.generate());
}
System.out.println(generated);
//[12367, 12348, 12359, 12349, 12357, 12368, 12369, 12347, 12358]
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While comparing two XML objects considering the following constraints :
1)Ignore white spaces
2)Ignore the array order
3)ignoring some elements containing date
Please help me consider the 3rd constraint
The following is the code that I tried :
XMLUnit.setIgnoreWhitespace(true);
XMLUnit.setIgnoreAttributeOrder(true);
DetailedDiff diff = new DetailedDiff(XMLUnit.compareXML(expectedXML, actualXML));
List<?> allDifferences = diff.getAllDifferences();
if(allDifferences.size() == 0)
System.out.println("Test Passed");
else
System.out.println("Test failed due to following differences: ");
for(int differences = 0; differences < allDifferences.size(); differences++) {
System.out.println(allDifferences.get(differences));
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Today i came across a fascinating slide here. It compares two for loops given below.
First
for (int i=0; i<n; i++) {
a[i] * = 3;
}
Second
for (int i=0; i<n; i+=16) {
a[i] * = 3;
}
Here if the first loop will take 8ms the second should be taking only 1ms, at least that's what I expected. But the slide concludes differently. Can anyone please explain why my code may behave like this?
This blog post explains the phenomenon in details. Essentially:
the first loop does 6x more work than the second
but they run in the same amount of time (roughly)
The reason is that the first loop has better cache locality, resulting in less cache misses. There are many questions on the subject on SO such as:
What is "cache-friendly" code?
Spacial Locality in loops
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Is there a way in java we can convert an expression (xml or any other) to logical operations.
for example I have a property
prop01=Achivment:APPCom,done&&TODO:getforecast,!done;Achivement done
is there a way I convert it to java code like
Map userData = getUserData();
Map achivements = userData.get("achivements");
Map TODOs = userData.get("TODOs");
String achiv = achivements.get("APPCom");
String todo = TODOs.get("getforecast");
if(achiv == "done" && todo != "done")
system.out.println("Achivement done"); // part after ; in expression
any third party available for this kind of task?
I don't think this can be done with any third party library directly. You may need to use some library like Antlr to write a translator to translate from your expression to your Java code.