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Difference between dispatch_async and dispatch_sync on serial queue?
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Yes. Using serial queue ensure the serial execution of tasks. The only difference is that dispatch_sync only return after the block is finished whereas dispatch_async return after it is added to the queue and may not finished.
for this code
dispatch_async(_serialQueue, ^{ printf("1"); });
print...
Can mustache iterate a top-level array?
... NM, figured it out: you can just ignore the dots: so {{1}} or if you want to do a logical check, then {{#1}} whatever {{/1}}
– thouliha
Apr 2 '15 at 17:29
8
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Using Enum values as String literals
...you have FOUR options here. All four offer a solution but with a slightly different approach...
Option One: use the built-in name() on an enum. This is perfectly fine if you don't need any special naming format.
String name = Modes.mode1.name(); // Returns the name of this enum constant, exact...
Adding external library into Qt Creator project
...rary name (without the extension and without any 'lib' prefix). Of course, if you are including a Windows specific lib, this really doesn't matter.
In case you want to store your lib files in the project directory, you can reference them with the $$_PRO_FILE_PWD_ variable, e.g.:
LIBS += -L"$$_PRO_...
Python Script execute commands in Terminal
...s module:
from subprocess import call
call(["ls", "-l"])
Reason is that if you want to pass some variable in the script this gives very easy way for example take the following part of the code
abc = a.c
call(["vim", abc])
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Loading cross-domain endpoint with AJAX
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I'm posting this in case someone faces the same problem I am facing right now. I've got a Zebra thermal printer, equipped with the ZebraNet print server, which offers a HTML-based user interface for editing multiple settings, seeing the printer's current status, etc. I need to get the status of the...
What's the u prefix in a Python string?
...l's Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets (No Excuses!) essay on character sets.
Q: sry no time code pls
A: Fine. try str('Some String') or 'Some String'.encode('ascii', 'ignore'). But you should really read some of the answers ...
hash function for string
...e as safe as you think--for example, IEEE floating point numbers have two different bit patterns (0 and -0) that should produce the same hashes (they'll compare as equal to each other).
– Jerry Coffin
Jul 15 '15 at 22:02
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How do you sign a Certificate Signing Request with your Certification Authority?
...arlier, because they can complicate things (they were unused at the time). Now you'll see how they are used, so hopefully they will make sense.
base_dir = .
certificate = $base_dir/cacert.pem # The CA certifcate
private_key = $base_dir/cakey.pem # The CA private key
new_certs_dir = $b...
java.net.URLEncoder.encode(String) is deprecated, what should I use instead?
...re static methods. It would take the same amount of effort to type either. If you like Python, why are you programming in Java? Is it because more people use Java than Python and you got a Java job instead of Python job?
– stepanian
Feb 27 '12 at 9:07
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