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In c++ what does a tilde “~” before a function name signify?
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It's the destructor, it destroys the instance, frees up memory, etc. etc.
Here's a description from ibm.com:
Destructors are usually used to deallocate memory and do other cleanup for a class object and its class members when the object is destroyed. A destructor is called for a class o...
When should I use uuid.uuid1() vs. uuid.uuid4() in python?
...is "like" v4 (host-agnostic), but worse (less bits, dependence on urandom, etc). Are there any advantages compared to just uuid4?
– rocketmonkeys
Aug 20 '17 at 15:24
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Clang optimization levels
On gcc, the manual explains what -O3 , -Os , etc. translate to in terms of specific optimisation arguments ( -funswitch-loops , -fcompare-elim , etc.)
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Reset/remove CSS styles for element only
...nguage-override: unset;
font-size-adjust: unset;
font-size: unset;
font-stretch: unset;
font-style: oblique;
font-synthesis: unset;
font-variant: unset;
font-weight: unset;
font: ;
force-broken-image-icon: unset;
height: unset;
hyphens: unset;
image-orientation: unset;
image-region: unset;
image-ren...
Detect whether there is an Internet connection available on Android [duplicate]
...if your app needs the potentially higher speeds of Wi-fi to work correctly etc.
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Combine multiple Collections into a single logical Collection?
...ods in the Collection interface would either have undefined semantics (add etc) or miserable performance (contains etc).
– Sean Patrick Floyd
Aug 2 '11 at 13:00
2
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What are good uses for Python3's “Function Annotations”
...estrictions, threads that are allowed to access, architecture limitations, etc., and there are quite a few tools that can then read these and process them to provide assurances beyond what you get from the compilers. You could even write things that check preconditions/postconditions.
I feel somet...
How to use MDC with thread pools?
...lt;Runnable> workQueue) {
return new MdcThreadPoolExecutor(MDC.getCopyOfContextMap(), corePoolSize, maximumPoolSize, keepAliveTime, unit,
workQueue);
}
/**
* Pool where task threads always have a specified, fixed MDC.
*/
public static MdcThreadPoolEx...
Difference between val() and text()
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val() is used to fetch value from all html input types like(checkbox,text,etc),where user have an option to input
value.
Ex:-
<input type="text" id="txt_name" />
<input type="checkbox" name="vehicle" value="Bike" id="chk_byk" cl...
Is a Java string really immutable?
...ge the values of enums, change the lookup table used in Integer autoboxing etc.
Now, the reason s1 and s2 change value, is that they both refer to the same interned string. The compiler does this (as mentioned by other answers).
The reason s3 does not was actually a bit surprising to me, as I tho...