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What is the usefulness of `enable_shared_from_this`?
...ran across enable_shared_from_this while reading the Boost.Asio examples and after reading the documentation I am still lost for how this should correctly be used. Can someone please give me an example and explanation of when using this class makes sense.
...
Convert all first letter to upper case, rest lower for each word
...case.
The first way is to create a method that simply caps the first char and appends the rest of the string using a substring:
public string UppercaseFirst(string s)
{
return char.ToUpper(s[0]) + s.Substring(1);
}
The second way (which is slightly faster) is to split the string ...
typedef struct vs struct definitions [duplicate]
...fier S within the struct name space (not in the C++ sense). You can use it and define variables or function arguments of the newly defined type by defining the type of the argument as struct S:
void f( struct S argument ); // struct is required here
The second line adds a type alias S in the glob...
Is there a generator version of `string.split()` in Python?
...offset parameter of the str.find() method. This avoids lots of memory use, and relying on the overhead of a regexp when it's not needed.
[edit 2016-8-2: updated this to optionally support regex separators]
def isplit(source, sep=None, regex=False):
"""
generator version of str.split()
...
ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired
...cked by some query. For example, you may have executed "select for update" and have not yet committed/rollbacked and fired another select query. Do a commit/rollback before executing your query.
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How can I do an UPDATE statement with JOIN in SQL Server?
...to do it in ANSI/ISO (aka should work on any SQL DBMS), MySQL, SQL Server, and Oracle. Be advised that my suggested ANSI/ISO method will typically be much slower than the other two methods, but if you're using a SQL DBMS other than MySQL, SQL Server, or Oracle, then it may be the only way to go (e.g...
Print multiple arguments in Python
...al score for "+str(name)"+ is "+str(score))
– Snakes and Coffee
Mar 8 '13 at 4:46
5
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How to get hex color value rather than RGB value?
... is designed to cope with the format given by a browser when using jQuery, and this doesn't have the different white-space or captilisation consistencies you are talking about. You could also use the same regex and just remove all whitespaces and convert to lowercase before matching on rgb. P.S. You...
Test if string is a number in Ruby on Rails
...method:
def is_number? string
true if Float(string) rescue false
end
And then call it like this:
my_string = '12.34'
is_number?( my_string )
# => true
Extend String Class.
If you want to be able to call is_number? directly on the string instead of passing it as a param to your helper f...
How to replace strings containing slashes with sed?
...
@MaxWaterman it's standard operating procedure when using sed that the regex command is put in double quotes. I didn't use them in my answer because I wasn't showing the whole sed command line but just the sed regex command string as the OP had ...