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How do I wait for an asynchronously dispatched block to finish?

... expose real behavior to the rest of the app than hide it behind a false façade. Instead, use NSNotificationCenter, define a custom delegate protocol with callbacks for your class. And if you don't like mucking with delegate callbacks all over, wrap them into a concrete proxy class that implemen...
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Difference between socket and websocket?

...g to Application Server over a protocol similar to HTTP that runs over TCP/IP. So they are primarily for Web Applications that require a permanent connection to its server. On the other hand, plain sockets are more powerful and generic. They run over TCP/IP but they are not restricted to browsers or...
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Convert pem key to ssh-rsa format

...ed Dec 13 '19 at 21:02 Jean-François Fabre♦ 122k1111 gold badges9797 silver badges156156 bronze badges answered Mar 28 '18 at 14:55 ...
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Java Replacing multiple different substring in a string at once (or in the most efficient way)

...s a bit more complexity that becomes an implementation detail by using a façade with the same method signature: private String testBorAhoCorasick( final String text, final Map<String, String> definitions ) { // Create a buffer sufficiently large that re-allocations are minimized. ...
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node and Error: EMFILE, too many open files

... FD TYPE DEVICE SIZE/OFF NODE NAME ... nodejs 12211 root 1012u IPv4 151317015 0t0 TCP 10.101.42.209:40371->54.236.3.170:80 (ESTABLISHED) nodejs 12211 root 1013u IPv4 151279902 0t0 TCP 10.101.42.209:43656->54.236.3.172:80 (ESTABLISHED) nodejs 12211 root 1014...
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How to make a flat list out of list of lists?

...cause of the quadratic aspect of the sum. – Jean-François Fabre♦ Jul 31 '17 at 18:04  |  show 13 more comments ...
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Maximum on http header values?

...y to define the custom max size of the header ? – Sudip Bolakhe Apr 30 '19 at 9:52 1 Be aware of ...
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How to pass a user defined argument in scrapy spider

...o pass arguments to run on scrapyd replace -a with -d curl http://your.ip.address.here:port/schedule.json -d spider=myspider -d category='mycategory' -d domain='example.com' The spider will receive arguments in its constructor. class MySpider(Spider): name="myspider" def __init__...
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Which $_SERVER variables are safe?

...hould be rejected by the web server and not cause the invocation of the script to begin with. Hence they can be considered reliable. 'HTTPS' 'REQUEST_TIME' 'REMOTE_ADDR' * 'REMOTE_HOST' * 'REMOTE_PORT' * 'SERVER_PROTOCOL' 'HTTP_HOST' † 'SERVER_NAME' † 'SCRIPT_FILENAME' 'SERVER_PORT' ‡ 'SCRIP...
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What is the purpose of the implicit grant authorization type in OAuth 2?

...choice between level of security and convenience. – PålOliver Jun 3 '13 at 11:49 2 This answers ...