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When to use ' (or quote) in Lisp?
... passed to it are evaluated. This means you can write this:
(* (+ a 2)
3)
Which in turn evaluates (+ a 2), by evaluating a and 2. The value of the symbol a is looked up in the current variable binding set, and then replaced. Say a is currently bound to the value 3:
(let ((a 3))
(* (+ a 2)
...
How do I remove leading whitespace in Python?
...
324
The lstrip() method will remove leading whitespaces, newline and tab characters on a string be...
Understanding dict.copy() - shallow or deep?
...ed by value, but just creating a new reference.
>>> a = {1: [1,2,3]}
>>> b = a.copy()
>>> a, b
({1: [1, 2, 3]}, {1: [1, 2, 3]})
>>> a[1].append(4)
>>> a, b
({1: [1, 2, 3, 4]}, {1: [1, 2, 3, 4]})
In contrast, a deep copy will copy all contents by value....
How do I activate C++ 11 in CMake?
...
CMake 3.1 introduced the CMAKE_CXX_STANDARD variable that you can use. If you know that you will always have CMake 3.1 available, you can just write this in your top-level CMakeLists.txt file, or put it right before any new target...
Working with $scope.$emit and $scope.$on
...trl:
function firstCtrl($scope)
{
$scope.$broadcast('someEvent', [1,2,3]);
}
function secondCtrl($scope)
{
$scope.$on('someEvent', function(event, mass) { console.log(mass); });
}
In case there is no parent-child relation between your scopes you
can inject $rootScope into the controller a...
case-insensitive list sorting, without lowercasing the result?
...
In Python 3.3+ there is the str.casefold method that's specifically designed for caseless matching:
sorted_list = sorted(unsorted_list, key=str.casefold)
In Python 2 use lower():
sorted_list = sorted(unsorted_list, key=lambda s: s....
Converting JavaScript object with numeric keys into array
...
328
It's actually very straight forward with jQuery's $.map
var arr = $.map(obj, function(el) { r...
How do I remove a property from a JavaScript object?
...
Jonathan
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answered Oct 16 '08 at 10:58
nickfnickf
...
Does a C# app track how long its been running?
...
3 Answers
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Is there an exponent operator in C#?
...
235
The C# language doesn't have a power operator. However, the .NET Framework offers the Math.Pow ...