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Getting exact error type in from DbValidationException
...eChanges();
}
catch (DbEntityValidationException ex)
{
string errorMessages = string.Join("; ", ex.EntityValidationErrors.SelectMany(x => x.ValidationErrors).Select(x => x.PropertyName + ": " + x.ErrorMessage));
throw new DbEntityValidationException(errorMessages);
...
How to save a BufferedImage as a File
...of the method is like this:
public static boolean write(RenderedImage im, String formatName, File output) throws IOException
Here im is the RenderedImage to be written, formatName is the String containing the informal name of the format (e.g. png) and output is the file object to be written to. A...
How can I view the shared preferences file using Android Studio?
...TextView;
prefTextView = (TextView) findViewById(R.id.tv_pref);
Map<String, ?> prefs = PreferenceManager.getDefaultSharedPreferences(
context).getAll();
for (String key : prefs.keySet()) {
Object pref = prefs.get(key);
String printVal = "";
if (pref ...
Why doesn't Haskell's Prelude.read return a Maybe?
...at returns Maybe. You can make one yourself:
readMaybe :: (Read a) => String -> Maybe a
readMaybe s = case reads s of
[(x, "")] -> Just x
_ -> Nothing
share
|
...
how to File.listFiles in alphabetical order?
...ith "xml" just do:
Files.list(Paths.get(dirName))
.filter(s -> s.toString().endsWith(".xml"))
.sorted()
.forEach(System.out::println)
Again, replace the printing with whichever processing operation you would like.
...
form serialize javascript (no framework)
...cent browsers), use this:
new URLSearchParams(new FormData(formElement)).toString()
Everywhere except IE
For browsers that support URLSearchParams but not the FormData(formElement) constructor, use this FormData polyfill and this code (works everywhere except IE):
new URLSearchParams(Array.from(new...
A regex to match a substring that isn't followed by a certain other substring
...--------------------------
^ the beginning of the string
--------------------------------------------------------------------------------
( group and capture to \1:
--------------------------------------------------------------------------------
...
what is the best way to convert a json formatted key value pair to ruby hash with symbol as key?
...
using the json gem when parsing the json string you can pass in the symbolize_names option. See here: http://flori.github.com/json/doc/index.html (look under parse)
eg:
>> s ="{\"akey\":\"one\",\"bkey\":\"two\"}"
>> JSON.parse(s,:symbolize_names => ...
How to get the first and last date of the current year?
...
This outputs strings, not dates. If that's what you really need, yay, but if you can use either, keep the dates as dates, and don't use them as strings.
– Jamie F
Nov 18 '12 at 4:09
...
How do I make a delay in Java?
..., to run the method myTask every second (Java 8):
public static void main(String[] args) {
final ScheduledExecutorService executorService = Executors.newSingleThreadScheduledExecutor();
executorService.scheduleAtFixedRate(App::myTask, 0, 1, TimeUnit.SECONDS);
}
private static void myTask()...