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Enums and Constants. Which to use when?
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What if you end up using .ToString() on the enum a lot, any value in using a class with const strings that looks and acts like an enum but circumvents a call to ToString()? Example
– Sinjai
J...
How to trim whitespace from a Bash variable?
...EXTERNAL_SPACE}"
# > length(FOO_NO_EXTERNAL_SPACE)==14
Alternatively, if your bash supports it, you can replace echo -e "${FOO}" | sed ... with sed ... <<<${FOO}, like so (for trailing whitespace):
FOO_NO_TRAIL_SPACE="$(sed -e 's/[[:space:]]*$//' <<<${FOO})"
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Using custom std::set comparator
...the class name as the type parameter
set<int64_t, lex_compare> s;
If you want to avoid the functor boilerplate code you can also use a function pointer (assuming lex_compare is a function).
set<int64_t, bool(*)(const int64_t& lhs, const int64_t& rhs)> s(&lex_compare);
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How to get std::vector pointer to the raw data?
... The advantage of this member function is that it is okay to call it even if the container is empty.
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Why use Ruby's attr_accessor, attr_reader and attr_writer?
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You may use the different accessors to communicate your intent to someone reading your code, and make it easier to write classes which will work correctly no matter how their public API is called.
class Person
attr_accessor :age
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end
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Java Error opening registry key
...y java.exe, javaw.exe and javaws.exe from your Windows\System32 folder and if you have an x64 system (Win 7 64 bits) also do the same under Windows\SysWOW64.
If you can't find them at these locations, try deleting them from C:\ProgramData\Oracle\Java\javapath.
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How do you add multi-line text to a UIButton?
...t to center it
button.titleLabel.textAlignment = NSTextAlignmentCenter; // if you want to
[button setTitle: @"Line1\nLine2" forState: UIControlStateNormal];
For iOS 5 and below use the following to allow multiple lines:
button.titleLabel.lineBreakMode = UILineBreakModeWordWrap;
// you probably w...
CardView layout_width=“match_parent” does not match parent RecyclerView width
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The docs for inflate:
Inflate a new view hierarchy from the specified xml resource. Throws
InflateException if there is an error.
Parameters
resource ID for an XML layout resource to load (e.g.,
R.layout.main_page) root
view to be the parent of the
generated hierarchy (if ...
Storing sex (gender) in database
... 4 - 2,147,483,648 to 2,147,483,647
BIT 1 (2 if 9+ columns) 2 (0 and 1)
CHAR(1) 1 26 if case insensitive, 52 otherwise
The BIT data type can be ruled out because it only supports two possible genders which is inadequate. While INT supports mor...
Change how fast “title” attribute's tooltip appears
...ange how fast the tooltip from an element's "title" attribute? I'd like it if the tooltip appeared immediately, but it seems to take a few seconds to apear.
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