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Java 8 List into Map
...ey is NOT guaranteed to be unique for all elements in the list, you should convert it to a Map<String, List<Choice>> instead of a Map<String, Choice>
Map<String, List<Choice>> result =
choices.stream().collect(Collectors.groupingBy(Choice::getName));
...
Formatting NSDate into particular styles for both year, month, day, and hour, minute, seconds
...at];
NSDate *date = [dateFormatter dateFromString:dateString];
// Convert date object into desired format
//[dateFormatter setDateFormat:@"yyyy-MM-dd"];
[dateFormatter setDateFormat:destFormat];
NSString *newDateString = [dateFormatter stringFromDate:date];
return newDateStr...
Make a phone call programmatically
...
The answers here are perfectly working. I am just converting Craig Mellon answer to Swift. If someone comes looking for swift answer, this will help them.
var phoneNumber: String = "telprompt://".stringByAppendingString(titleLabel.text!) // titleLabel.text has the phone nu...
LINQ equivalent of foreach for IEnumerable
...dex as a parameter, whereas with foreach you must rebuild the classic for (int i..) construct. And functional languages have to allow iteration that has side effects - otherwise you could never do one iota of work with them :) I'd like to point out that the typical functional method would be to ...
Directory-tree listing in Python
...would be better, but I guess a generator is more versatile since it can be converted to a list. It depends on whether you're looking for, versatility or something a little bit more streamlined.
– James Mchugh
Aug 9 '18 at 20:02
...
How do I get elapsed time in milliseconds in Ruby?
...) values. These operations result in second resolution which can easily be converted.
For example:
def time_diff_milli(start, finish)
(finish - start) * 1000.0
end
t1 = Time.now
# arbitrary elapsed time
t2 = Time.now
msecs = time_diff_milli t1, t2
You will need to decide whether to truncat...
What are .dex files in Android?
... files. But after .class files are generated, the “dx” tool is used to convert all .class files into a single .dex, or Dalvik Executable, file. It is the .dex file that is executed on the Dalvik VM. The .dex file has been optimized for memory usage and the design is primarily driven by sharing o...
MySQL Update Inner Join tables query
...no syntax error in my query:
mysql> create table business (business_id int unsigned primary key auto_increment, mapx varchar(255), mapy varchar(255)) engine=innodb;
Query OK, 0 rows affected (0.01 sec)
mysql> create table business_geocode (business_geocode_id int unsigned primary key auto_in...
Excel Date to String conversion
...ming cell A1 contains a date, and using VBA code:
Dim strDate As String
'Convert to string the value contained in A1 (a date)
strDate = CStr([A1].Value)
You can, thereafter, manipulate it as any ordinary string using string functions (MID, LEFT, RIGHT, LEN, CONCATENATE (&), etc.)
...
Most efficient way to remove special characters from string
...fficient ways that you can do it.
You should of course read the character into a local variable or use an enumerator to reduce the number of array accesses:
public static string RemoveSpecialCharacters(this string str) {
StringBuilder sb = new StringBuilder();
foreach (char c in str) {
...