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How does facebook, gmail send the real time notification?
...ave read some posts about this topic and the answers are comet, reverse ajax, http streaming, server push, etc.
5 Answers
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How to cherry pick a range of commits and merge into another branch?
...it; you'll get an "unknown revision" error otherwise.
Note: as of Git 2.9.x/2.10 (Q3 2016), you can cherry-pick a range of commit directly on an orphan branch (empty head): see "How to make existing branch an orphan in git".
Original answer (January 2010)
A rebase --onto would be better, where you...
Set a persistent environment variable from cmd.exe
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Use the SETX command (note the 'x' suffix) to set variables that persist after the cmd window has been closed.
For example, to set an env var "foo" with value of "bar":
setx foo bar
Though it's worth reading the 'notes' that are dis...
When to favor ng-if vs. ng-show/ng-hide?
...ur handlers or anything else attached to those elements will be lost. For example, if you bound a click handler to one of child elements, when ng-if evaluates to false, that element will be removed from DOM and your click handler will not work any more, even after ng-if later evaluates to true and d...
When do you use map vs flatMap in RxJava?
When do you use map vs flatMap in RxJava ?
10 Answers
10
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How can I sanitize user input with PHP?
... somewhere that works well for sanitizing user input for SQL injection and XSS attacks, while still allowing certain types of HTML tags?
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Select random lines from a file
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I ran this on a 500M row file to extract 1,000 rows and it took 13 min. The file had not been accessed in months, and is on an Amazon EC2 SSD Drive.
– T. Brian Jones
Mar 4 '16 at 18:26
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Difference between int32, int, int32_t, int8 and int8_t
..., but does not define anything named int8 or int32 -- the latter (if they exist at all) is probably from some other header or library (most likely predates the addition of int8_t and int32_t in C99).
Plain int is quite a bit different from the others. Where int8_t and int32_t each have a specified ...
Creating a textarea with auto-resize
...her thread about this , which I've tried. But there is one problem: the textarea doesn't shrink if you delete the content. I can't find any way to shrink it to the correct size - the clientHeight value comes back as the full size of the textarea , not its contents.
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Does the JVM prevent tail call optimizations?
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I did not quite follow the explanation. I thought tail-call optimization was implemented by the compiler. Assuming you have a function that could be tail-call optimized by the compiler, you could also then have an equivalent non-recursive function that ...