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How can we programmatically detect which iOS version is device running on? [duplicate]
... iPhone iOS Version)
Those macros do exist in github, see: https://github.com/carlj/CJAMacros/blob/master/CJAMacros/CJAMacros.h
Like this:
#define SYSTEM_VERSION_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedSame)
#define ...
When to use Comparable and Comparator
...say Score. Without giving much thought I wrote a new class that implements Comparator, that does the task and it works.
19...
Converting a Java Keystore into PEM Format
... -keystore foo.jks -genkeypair -alias foo \
-dname 'CN=foo.example.com,L=Melbourne,ST=Victoria,C=AU'
Enter keystore password:
Re-enter new password:
Enter key password for
(RETURN if same as keystore password):
bash$ keytool -keystore foo.jks -exportcert -alias foo | \
o...
Where are static variables stored in C and C++?
...n this concept:
here is very good link explaining these concepts:
http://www.inf.udec.cl/~leo/teoX.pdf
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Google Authenticator implementation in Python
...loaded it to GitHub as separate module called onetimepass (available here: https://github.com/tadeck/onetimepass).
import hmac, base64, struct, hashlib, time
def get_hotp_token(secret, intervals_no):
key = base64.b32decode(secret, True)
msg = struct.pack(">Q", intervals_no)
h = hmac...
How do I URL encode a string
...ve-c iPhone percent encode a string?
Objective-C and Swift URL encoding
http://cybersam.com/programming/proper-url-percent-encoding-in-ios
https://devforums.apple.com/message/15674#15674
http://simonwoodside.com/weblog/2009/4/22/how_to_really_url_encode/
...
NSDictionary - Need to check whether dictionary contains key-value pair or not
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
Turning off some legends in a ggplot
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
super() raises “TypeError: must be type, not classobj” for new-style class
...ct new objects of type instance). Partial reference: https://stackoverflow.com/a/9699961/42973.
PS: The difference between a new-style class and an old-style one can also be seen with:
>>> type(OldStyle) # OldStyle creates objects but is not itself a type
classobj
>>> isinstance...
What are rvalues, lvalues, xvalues, glvalues, and prvalues?
...
Thanks, this answer is really helpful! But my compiler doesn't agree with your examples for xvalues and prvalues; they are the exact opposite. Returning by rvalue reference gives me a prvalue, and returning by value gives me an xvalue. Did you get them mixed up, or is m...