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Futures vs. Promises
...tionality from the "consumer/reader".
auto promise = std::promise<std::string>();
auto producer = std::thread([&]
{
promise.set_value("Hello World");
});
auto future = promise.get_future();
auto consumer = std::thread([&]
{
std::cout << future.get();
});
producer.joi...
HashSet vs. List performance
...ery very small to get an advantage from List<T>. For a list of short strings, the advantage went away after size 5, for objects after size 20.
1 item LIST strs time: 617ms
1 item HASHSET strs time: 1332ms
2 item LIST strs time: 781ms
2 item HASHSET strs time: 1354ms
3 item LIST strs time: 9...
Maintain/Save/Restore scroll position when returning to a ListView
...re details:
On top on my ListActivity-derived class:
private static final String LIST_STATE = "listState";
private Parcelable mListState = null;
Then, some method overrides:
@Override
protected void onRestoreInstanceState(Bundle state) {
super.onRestoreInstanceState(state);
mListState = ...
Convert MySql DateTime stamp into JavaScript's Date format
...y the Date() constructor.
All that's needed is a very simple split on the string:
// Split timestamp into [ Y, M, D, h, m, s ]
var t = "2010-06-09 13:12:01".split(/[- :]/);
// Apply each element to the Date function
var d = new Date(Date.UTC(t[0], t[1]-1, t[2], t[3], t[4], t[5]));
console.log(d)...
How to read a text file into a string variable and strip newlines?
...
To join all lines into a string and remove new lines, I normally use :
with open('t.txt') as f:
s = " ".join([x.strip() for x in f])
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How to use Class in Java?
...hat Vector<int[]> is a vector of integer arrays, and HashTable<String, Person> is a table of whose keys are strings and values Person s.
However, what stumps me is the usage of Class<> .
...
Using two values for one switch case statement
...ays in a particular month:
class SwitchDemo {
public static void main(String[] args) {
int month = 2;
int year = 2000;
int numDays = 0;
switch (month) {
case 1:
case 3:
case 5:
case 7:
case 8:
...
Convert blob to base64
This is a snippet for the code that I want to do Blob to Base64 string:
9 Answers
...
Using JSON.NET as the default JSON serializer in ASP.NET MVC 3 - is it possible?
...verload. This works well:
protected override JsonResult Json(object data, string contentType, Encoding contentEncoding)
EDIT 1: A JsonResult extension...
public class JsonNetResult : JsonResult
{
public override void ExecuteResult(ControllerContext context)
{
if (context == null)...
How do I set the selected item in a comboBox to match my string using C#?
I have a string "test1" and my comboBox contains test1 , test2 , and test3 . How do I set the selected item to "test1"? That is, how do I match my string to one of the comboBox items?
...