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How can I check for Python version in a program that uses new language features?
...oesn't have ternary
Also, with is available in Python 2.5, just add from __future__ import with_statement.
EDIT: to get control early enough, you could split it into different .py files and check compatibility in the main file before importing (e.g. in __init__.py in a package):
# __init__.py
#...
django : using select_related and get_object_or_404 together
Is there any way of using get_object_or_404 and select_related together or any other way to achieve the result of using these two together(except from putting it in try/except)??
...
Test if a variable is a list or tuple
...
How about: hasattr(a, "__iter__") ?
It tells if the object returned can be iterated over as a generator. By default, tuples and lists can, but not the string types.
share...
What does the regular expression /_/g mean?
...
The regex matches the _ character.
The g means Global, and causes the replace call to replace all matches, not just the first one.
share
|
impro...
How to remove an item from an array in AngularJS scope?
...te</a>
Controller:
$scope.delete = function ( idx ) {
var person_to_delete = $scope.persons[idx];
API.DeletePerson({ id: person_to_delete.id }, function (success) {
$scope.persons.splice(idx, 1);
});
};
...
The most accurate way to check JS object's type?
... constructor:
Native Type Ex1:
var string1 = "Test";
console.log(string1.__proto__.constructor.name);
displays:
String
Ex2:
var array1 = [];
console.log(array1.__proto__.constructor.name);
displays:
Array
Custom Classes:
function CustomClass(){
console.log("Custom Class Object C...
How can I find the data structure that represents mine layout of Minesweeper in memory?
...g]
This is message id, which in case of F2 button press should contain WM_COMMAND value. You are to find where it is compared to 111h. It can be done either by tracing down edx in IDA or by setting conditional breakpoint in WinDbg and pressing F2 in the game.
Either way leads to something like
....
Can I use multiple versions of jQuery on the same page?
...1.3.js"></script>
<script type="text/javascript">
var jQuery_1_1_3 = $.noConflict(true);
</script>
<!-- load jQuery 1.3.2 -->
<script type="text/javascript" src="http://example.com/jquery-1.3.2.js"></script>
<script type="text/javascript">
var jQuery_1_3...
Can iterators be reset in Python?
...r protocol is very simple, and only provides one single method (.next() or __next__()), and no method to reset an iterator in general.
The common pattern is to instead create a new iterator using the same procedure again.
If you want to "save off" an iterator so that you can go back to its beginni...
How can we match a^n b^n with Java regex?
... testAll($r, $tests) {
foreach ($tests as $test) {
$isMatch = preg_match($r, $test, $groups);
$groupsJoined = join('|', $groups);
print("$test $isMatch $groupsJoined\n");
}
}
$tests = array('aaa', 'aaab', 'aaaxb', 'xaaab', 'b', 'abbb');
$r1 = '/^a+(?=b+)/';
# └...