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C# Lambda expressions: Why should I use them?
...e they are:
// anonymous delegate
var evens = Enumerable
.Range(1, 100)
.Where(delegate(int x) { return (x % 2) == 0; })
.ToList();
// lambda expression
var evens = Enumerable
.Range(1, 100)
.Where(x => (x % 2) == 0...
Numpy how to iterate over columns of array?
...
This should give you a start
>>> for col in range(arr.shape[1]):
some_function(arr[:,col])
[1 2 3 4]
[99 14 12 43]
[2 5 7 1]
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...
Break a previous commit into multiple commits
... where <commit> is the commit you want to split. In fact, any commit range will do, as long as it contains that commit.
Mark the commit you want to split with the action "edit".
When it comes to editing that commit, execute git reset HEAD^. The effect is that the HEAD is rewound by one, and ...
Difference between a Seq and a List in Scala
...efined order of elements. Sequences provide a method apply() for indexing, ranging from 0 up to the length of the sequence. Seq has many subclasses including Queue, Range, List, Stack, and LinkedList.
A List is a Seq that is implemented as an immutable linked list. It's best used in cases with last...
Fast and responsive interactive charts/graphs: SVG, Canvas, other?
...of the problem leads to a basic problem of computational geometry, namely: range searching and another one of computer graphics: level of detail.
To solve your performance problem you need to implement a good preprocessor which is able to find very fast which stars to display and is perhaps able to...
Is there a zip-like function that pads to longest length in Python?
...:
yield None
gens = [g(l) for l in lists]
for _ in range(max(map(len, lists))):
yield tuple(next(g) for g in gens)
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What is the memory consumption of an object in Java?
...ive to useful payload (2 bytes for each char plus 4 bytes for the length), ranges from 100 to 400 percent.
Alignment
Consider this example object:
class X { // 8 bytes for reference to the class definition
int a; // 4 bytes
byte b; ...
在 App Inventor 2 中使用图像 · App Inventor 2 中文网
...×4 = 104 Megabytes. Typical amounts of memory available to a running app range anywhere from 20 to 50 Megabytes (not to mention that MIT App Inventor requires the app source file, including images, to be less than 5 Megabytes). So the app will simply not work, and the project will get an OutOfMe...
How to append multiple values to a list in Python
...
>>> lst
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>> lst.extend(range(11, 14))
>>> lst
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]
So you can use list.append() to append a single value, and list.extend() to append multiple values.
...
how do i remove a comma off the end of a string?
...and corresponding ltrim for left trim) is very useful as you can specify a range of characters to remove, i.e. to remove commas and trailing whitespace you would write:
$string = rtrim($string, ", \t\n");
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