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Log to the base 2 in python
...np.log2(x, y=None)
Docstring:
Return the base 2 logarithm of the input array, element-wise.
Parameters
----------
x : array_like
Input array.
y : array_like
Optional output array with the same shape as `x`.
Returns
-------
y : ndarray
The logarithm to the base 2 of `x` element-wise.
Na...
Java 8 stream's .min() and .max(): why does this compile?
...
I had an error with an array getting the max and the min so my solution was:
int max = Arrays.stream(arrayWithInts).max().getAsInt();
int min = Arrays.stream(arrayWithInts).min().getAsInt();
...
Objective-C implicit conversion loses integer precision 'NSUInteger' (aka 'unsigned long') to 'int'
...
The count method of NSArray returns an NSUInteger, and on the 64-bit OS X platform
NSUInteger is defined as unsigned long, and
unsigned long is a 64-bit unsigned integer.
int is a 32-bit integer.
So int is a "smaller" datatype than NSUInteger,...
Most efficient way to cast List to List
... in the list is a SubClass.
Generic collections do not behave the same as arrays in Java. Arrays are covariant; that is, it is allowed to do this:
SubClass[] subs = ...;
BaseClass[] bases = subs;
This is allowed, because the array "knows" the type of its elements. If someone attempts to store so...
What uses are there for “placement new”?
...cle, but I'm not sure I understand the advantage of using this over boost::array. Can you expand on that a bit?
– GrahamS
Feb 10 '11 at 11:52
...
Java ArrayList - how can I tell if two lists are equal, order not mattering?
I have two ArrayList s of type Answer (self-made class).
18 Answers
18
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Encrypting & Decrypting a String in C# [duplicate]
...elManaged class does indeed normally require you to "muck about" with byte arrays, salts, keys, initialization vectors etc. but this is precisely the kind of detail that can be somewhat abstracted away within your "wrapper" class.
The following class is one I wrote a while ago to perform exactly th...
Get index of element as child relative to parent
... with built-in DOM manipulation, get a collection of the li siblings in an array, and on click, check the indexOf the clicked element in that array.
const lis = [...document.querySelectorAll('#wizard > li')];
lis.forEach((li) => {
li.addEventListener('click', () => {
const ind...
using jquery $.ajax to call a PHP function
... + strLenB;
console.log( totalStrLen ); // 25
// .data Returns data in an array
var data1 = P.crypt("Some Crypt String").data();
console.log( data1 ); // ["$1$Tk1b01rk$shTKSqDslatUSRV3WdlnI/"]
Demonstrating PHP function chaining:
var data1 = P.strtoupper("u,p,p,e,r,c,a,s,e").strstr([], "C,A,S,E"...
Difference between map, applymap and apply methods in Pandas
...ed this book):
Another frequent operation is applying a function on 1D arrays to each column or row. DataFrame’s apply method does exactly this:
In [116]: frame = DataFrame(np.random.randn(4, 3), columns=list('bde'), index=['Utah', 'Ohio', 'Texas', 'Oregon'])
In [117]: frame
Out[117]:
...