built-in

How to override built-in PHP function(s)?

I think it could be done like so: //First rename existing function rename_function(‘strlen’, ‘new_strlen’); //Override function with another override_function(‘strlen’, ‘$string’, ‘return override_strlen($string);’); //Create the other function function override_strlen($string){ return new_strlen($string); } found it here Notice that every host must have http://php.net/manual/en/book.apd.php installed on the server. Edit Another way is to use namespaces <?php namespace mysql2pdo; … Read more

Decimal to hex conversion c++ built-in function

Decimal to hex :- std::stringstream ss; ss<< std::hex << decimal_value; // int decimal_value std::string res ( ss.str() ); std::cout << res; Hex to decimal :- std::stringstream ss; ss << hex_value ; // std::string hex_value ss >> std::hex >> decimal_value ; //int decimal_value std::cout << decimal_value ; Ref: std::hex, std::stringstream

What’s the difference between identical(x, y) and isTRUE(all.equal(x, y))?

all.equal tests for near equality, while identical is more exact (e.g. it has no tolerance for differences, and it compares storage type). From ?identical: The function ‘all.equal’ is also sometimes used to test equality this way, but was intended for something different: it allows for small differences in numeric results. And one reason you would … Read more

Override the {…} notation so i get an OrderedDict() instead of a dict()?

Here’s a hack that almost gives you the syntax you want: class _OrderedDictMaker(object): def __getitem__(self, keys): if not isinstance(keys, tuple): keys = (keys,) assert all(isinstance(key, slice) for key in keys) return OrderedDict([(k.start, k.stop) for k in keys]) ordereddict = _OrderedDictMaker() from nastyhacks import ordereddict menu = ordereddict[ “about” : “about”, “login” : “login”, ‘signup’: “signup” … Read more

Decorating Hex function to pad zeros

Use the new .format() string method: >>> “{0:#0{1}x}”.format(42,6) ‘0x002a’ Explanation: { # Format identifier 0: # first parameter # # use “0x” prefix 0 # fill with zeroes {1} # to a length of n characters (including 0x), defined by the second parameter x # hexadecimal number, using lowercase letters for a-f } # End … Read more

Python sum, why not strings? [closed]

Python tries to discourage you from “summing” strings. You’re supposed to join them: “”.join(list_of_strings) It’s a lot faster, and uses much less memory. A quick benchmark: $ python -m timeit -s ‘import operator; strings = [“a”]*10000’ ‘r = reduce(operator.add, strings)’ 100 loops, best of 3: 8.46 msec per loop $ python -m timeit -s ‘import … Read more