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WebSockets vs. Server-Sent events/EventSource
...ata to the browser and receive data from the browser. A good example of an application that could use websockets is a chat application.
SSE connections can only push data to the browser. Online stock quotes, or twitters updating timeline or feed are good examples of an application that could benefi...
Reading/writing an INI file
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Maybe a more traditional default would be per-application (not per-assembly) .ini files like Path.GetFullPath(IniPath ?? Path.ChangeExtension(Application.ExecutablePath, ".ini")).
– Eugene Ryabtsev
Apr 21 '16 at 10:44
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How does facebook, gmail send the real time notification?
...n a given interval (perhaps every few seconds), to check if something has happened. However, this can be pretty network intensive, and you often make pointless requests, because nothing has happened.
The way Facebook does it is using the comet approach, rather than polling on an interval, as soon a...
How to display unique records from a has_many through relationship?
...g to learn from nonetheless (actually I may use this somewhere else in the app). What are your thoughts on performance for the various approaches mentioned on this page?
– Andy Harvey
May 3 '11 at 12:31
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Using awk to remove the Byte-order mark
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@tchrist: you mean it breaks broken stuff? :) proper apps should be able to handle that BOM.
– Karoly Horvath
Mar 17 '12 at 18:31
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What is the difference between “git init” and “git init --bare”?
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To test git commands try: github.com/sergiocabral/App.GitPlayground
– Sergio Cabral
Nov 8 '19 at 7:44
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Validate that a string is a positive integer
...lly big numbers, this will go to scientific notation, which may break this approach. (I don't quite know where the split is, the details are in the spec, but for whole numbers I believe it's at the point you've exceeded 21 digits [by which time the number has become very imprecise, as IEEE-754 doubl...
parseInt vs unary plus, when to use which?
... suprised that parseInt beats unary plus on iOS :) This is helpful for web apps with heavy CPU consumption only. As a rule-of-thumb I'd suggest JS opt-guys to consider any JS operator over another one from the mobile performance point of view nowadays.
So, go mobile-first ;)
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Smooth GPS data
...ement; variance = accuracy*accuracy;
} else {
// else apply Kalman filter methodology
long TimeInc_milliseconds = TimeStamp_milliseconds - this.TimeStamp_milliseconds;
if (TimeInc_milliseconds > 0) {
// time has moved on, so the uncert...
Possible reason for NGINX 499 error codes
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As a special case, I noticed it sometimes happen when the end-user double-clicks a form submit button. The form is sent twice, but only one response is expected by the client. This can be worked around by disabling (at least for a few seconds) buttons in JS the first ...