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How to change background color in android app
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This is not a good idea, because it will result in unnecessary GPU overdraw (first, the window background will be drawn and then the TextView's background on top of it). See: curious-creature.com/docs/android-performance-case-study-1.html
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Is there any difference between “foo is None” and “foo == None”?
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I just tried a=1;b=1;print(a is b) # True. Any idea why a is b turn out to be true even if they seems to be 2 different object (different address in memory)?
– Johnny Chiu
May 9 '19 at 3:28
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Determine whether JSON is a JSONObject or JSONArray
... going to receive either a JSON Object or Array from server, but I have no idea which it will be. I need to work with the JSON, but to do so, I need to know if it is an Object or an Array.
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Base64 Java encode and decode a string [duplicate]
...ould be to try/catch the encoding/decoding steps but hopefully you get the idea.
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How to escape the % (percent) sign in C's printf?
... then go through it doubling up the % signs. I eventually came across this idea and replaced a 20-30 line function with one line. Don't worry, I did beat myself severely about the head, as I deserved.
– Graeme Perrow
Dec 7 '09 at 14:19
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How to get Sinatra to auto-reload the file after each change?
...rackup, instead do
the following:
$ rerun 'rackup'
You get the idea.
If you still want in-process reloading, check out Sinatra::Reloader.
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QString to char* conversion
...cesinOrbit: writing to QString's contents without it knowing is a horrible idea, hence of course const char* is what can really be obtained. The user is free to copy the data to a writable buffer.
– Eli Bendersky
Nov 16 '12 at 14:28
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How to list files in an android directory?
... Thanks Yury, strangely file.length gives a NullPointerException... any ideas? Spasibo!
– Roger Travis
Dec 27 '11 at 17:36
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“[notice] child pid XXXX exit signal Segmentation fault (11)” in apache error.log [closed]
...include the backtrace.
If the crash is hard to reproduce it may be a good idea to configure Apache to only use one child processes for handling requests. The config is something like this:
StartServers 1
MinSpareServers 1
MaxSpareServers 1
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How to read lines of a file in Ruby
...ne|
print "#{line_num += 1} #{line}"
end
Of course this could be a bad idea on very large files since it means loading the whole file into memory.
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