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How can I read a whole file into a string variable
...ty. It will continue to expand as more data is added. ioutil.Readfile will allocate a buffer that is big enough to fit the complete file and not need to reallocate.
– Stephen Weinberg
Nov 22 '12 at 17:08
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What are major differences between C# and Java?
...llows the definition of "structs", which are similar to classes but may be allocated on the stack (unlike instances of classes in C# and Java).
• C# implements properties as part of the language syntax.
• C# allows switch statements to operate on strings.
• C# allows anonymous methods...
What is database pooling?
...e connections to multiple servers and multiple user accounts, they may pre-allocate some baseline of connections so some are ready immediately, and they may actually close old connections when the usage pattern quietens down.
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Static Vs. Dynamic Binding in Java
...object. e.g. [speak(), speak(String) Class object]
A pointer to the memory allocated on the heap for that object’s data e.g. values of instance variables.
So all object references indirectly hold a reference to a table which holds all the method references of that object. Java has borrowed this ...
smart pointers (boost) explained
...neither transferable nor sharable. It's just usable if you locally need to allocate memory, but be sure it's freed again when it goes out of scope. But it can still be swapped with another scoped_ptr, if you wish to do so.
shared_ptr is a smart pointer that shares ownership (third kind above). It ...
Initializing a struct to 0
...so just declare it myStruct _m;
If the data is a local variable or a heap-allocated zone, clear it with memset like:
memset(&m, 0, sizeof(myStruct));
Current compilers (e.g. recent versions of gcc) optimize that quite well in practice. This works only if all zero values (include null pointer...
How do I avoid capturing self in blocks when implementing an API?
... sample
self.delegate = aDelegate;
self.dataProcessor = [[MyDataProcessor alloc] init];
// Use this inside blocks
__block id myself = self;
self.dataProcessor.progress = ^(CGFloat percentComplete) {
[myself.delegate myAPI:myself isProcessingWithProgress:percentComplete];
};
self.dataProcesso...
When should you use constexpr capability in C++11?
... @alecov Definitly not everything... I/O, syscall and dynamic memory allocation definitly cann't be marked as constexpr Besides, not everything should be constexpr.
– JiaHao Xu
Oct 8 '18 at 7:52
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What is the difference between tinyint, smallint, mediumint, bigint and int in MySQL?
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The difference is the amount of memory allocated to each integer, and how large a number they each can store.
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What's the meaning of interface{}?
...dicated to holding the value in the interface structure, so the assignment allocates a chunk of memory on the heap and records the pointer in the one-word slot.
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