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Named placeholders in string formatting
...make one single pass through the format string.
– 200_success
May 15 '18 at 14:24
@200_success Yes good point talking ...
Java Serializable Object to Byte Array
... answered May 15 '18 at 7:06
gzg_55gzg_55
4122 bronze badges
...
adding multiple entries to a HashMap at once in one statement
... 2016) as follow:
Map<String, Integer> cities = Map.of("Brussels", 1_139000, "Cardiff", 341_000);
The var-args case for Map is a little bit harder, you need to have both keys and values, but in Java, methods can’t have two var-args parameters. So the general case is handled by taking a va...
Samples of Scala and Java code where Scala code looks simpler/has fewer lines?
...the is prefix used for booleans. davetron5000.github.com/scala-style/naming_conventions/methods/…
– Esko Luontola
Jun 1 '10 at 20:40
7
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Python Create unix timestamp five minutes in the future
...imestamp() method to get the timestamp as a float.
import datetime
current_time = datetime.datetime.now(datetime.timezone.utc)
unix_timestamp = current_time.timestamp() # works if Python >= 3.3
unix_timestamp_plus_5_min = unix_timestamp + (5 * 60) # 5 min * 60 seconds
...
How to disable / enable dialog negative positive buttons?
...ertDialog.Builder(MainActivity.this);
builder.setIcon(android.R.drawable.ic_dialog_info);
builder.setTitle("Alert dialog title");
builder.setMessage("This is the example code snippet to disable button if edittext attached to dialog is empty.");
builder.setPositiveButton("PositiveButton",
new...
What is the difference between concurrency and parallelism?
...h. See also this excellent explanation: haskell.org/haskellwiki/Parallelism_vs._Concurrency
– jberryman
Oct 7 '11 at 2:25
9
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How to print struct variables in console?
...se2{
Page: 1,
Fruits: []string{"apple", "peach", "pear"}}
res2B, _ := json.Marshal(res2D)
fmt.Println(string(res2B))
That would print:
{"page":1,"fruits":["apple","peach","pear"]}
If you don't have any instance, then you need to use reflection to display the name of the field of a g...
What is the colon operator in Ruby?
...te some of the things mentioned in the answers:
require 'benchmark'
n = 1_000_000
print '"foo".equal? "foo" -> ', ("foo".equal? "foo"), "\n"
print '"foo" == "foo" -> ', ("foo" == "foo" ), "\n"
print ':foo.equal? :foo -> ', (:foo.equal? :foo ), "\n"
print ':foo == :foo -&g...
Measure and Benchmark Time for Ruby Methods
...justments to the system clock, so it's a best practice to use Process.clock_gettime(Process::CLOCK_MONOTONIC) instead. But for rough calculations this doesn't matter. blog.dnsimple.com/2018/03/elapsed-time-with-ruby-the-right-way
– Patrick Brinich-Langlois
Feb ...