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Most efficient way to increment a Map value in Java
....
ContainsKey
import java.util.HashMap;
import java.util.Map;
...
Map<String, Integer> freq = new HashMap<String, Integer>();
...
int count = freq.containsKey(word) ? freq.get(word) : 0;
freq.put(word, count + 1);
TestForNull
import java.util.HashMap;
import java.util.Map;
...
Map&l...
How to randomize two ArrayLists in the same fashion?
... a single array or List of those objects.
public class Data {
private String txtFileName;
private String imgFileName;
// Add/generate c'tor, getter/setter, equals, hashCode and other boilerplate.
}
Usage example:
List<Data> list = new ArrayList<Data>();
list.add(new Data...
Format in kotlin string templates
Kotlin has an excellent feature called string templates. I really love it.
6 Answers
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Removing first x characters from string?
How might one remove the first x characters from a string? For example, if one had a string lipsum , how would they remove the first 3 characters and get a result of sum ?
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How to validate GUID is a GUID
How to determine if a string contains a GUID vs just a string of numbers.
9 Answers
9
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C++ equivalent of Java's toString?
...a custom class. Is that possible in C++? In Java you could override the toString() method for similar purpose.
5 Answers
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ASP.NET MVC: No parameterless constructor defined for this object
...r some other people that come here: if you have just Tuples (like Tuple<string, string> data; ) in your class, serialization will be ok (because I encountered this prob during JSON serialization)... but if you use something like List<Tuple<string, string>> data; you'll start having...
With Spring can I make an optional path variable?
...tBean typedTestBean(
HttpServletRequest req,
@PathVariable String type,
@RequestParam("track") String track) {
return getTestBean(type);
}
@RequestMapping(value = "/json", method = RequestMethod.GET)
public @ResponseBody TestBean testBean(
HttpServletRequest req,...
How do you tell Resharper that a method parameter is a string containing a CSS class?
...public static class MyValuesContainer
{
public static readonly string[] Values = { "one", "two", "three" };
}
public class MyMethodContainer
{
public string MyMethod([ValueProvider("ValueProviderSample.MyValuesContainer.Values")]
string...
How to add line break for UILabel?
Let see that I have a string look like this:
21 Answers
21
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