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Most efficient way to cast List to List
...java programmers would not think twice before implementing getAllFoos() as allocating a new ArrayList<Foo>, populating it with all the elements from zorkingFoos and returning it. I enjoy entertaining the thought that about 30% of all clock cycles consumed by java code running on millions of m...
Count the number of occurrences of a character in a string in Javascript
...bar".split("o").length-1
//>2
split not recommended. Resource hungry. Allocates new instances of 'Array' for each match. Don't try that for a >100MB file via FileReader. You can actually easily observe the EXACT resource usage using Chrome's profiler option.
3.
var stringsearch = "o"
,str...
Convert file path to a file URI?
...e URL even if the buffer is smaller, so I first obtain the length and then allocate the buffer.
Some very interesting observation I had is that while "\\device\path" is correctly transformed to "file://device/path", specifically "\\localhost\path" is transformed to just "file:///path".
The WinApi ...
Node.js throws “btoa is not defined” error
... is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.
– Rodrigo De Almeida Siqueira
Jun 13 '19 at 13:14
...
How to dismiss keyboard for UITextView with return key?
...ad{
....
UITapGestureRecognizer *tapRec = [[UITapGestureRecognizer alloc]
initWithTarget:self action:@selector(tap:)];
[self.view addGestureRecognizer: tapRec];
....
}
-(void)tap:(UITapGestureRecognizer *)tapRec{
[[self view] endEditing: YES];
}
When the user taps out...
C++ display stack trace on exception
...)-ed
char** symbollist = backtrace_symbols(addrlist, addrlen);
// allocate string which will be filled with the demangled function name
size_t funcnamesize = 256;
char* funcname = (char*)malloc(funcnamesize);
// iterate over the returned symbol lines. skip the first, it is the
...
Override devise registrations controller
...ecord::Base
# Include default devise modules. Others available are:
# :token_authenticatable, :confirmable, :lockable and :timeoutable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
has_many :owned_organizations, :class_name =>...
Java: Detect duplicates in ArrayList?
... Would it be more efficient to tell the HashSet how much space to allocate: Set<T> set = new HashSet<T>(list.size());? Given a List parameter I think it is more efficient if it is common for the list to not contain duplicates.
– Paul Jackson
...
Can we have functions inside functions in C++?
... Note that the class instantiation approach comes with a memory allocation and is therefore dominated by the static approach.
– ManuelSchneid3r
May 18 '18 at 19:34
...
How can I randomize the lines in a file using standard tools on Red Hat Linux?
...to process (much, much longer than with shuf), no matter how much memory I allocated.
– mklement0
May 8 '15 at 23:00
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