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How to flatten only some dimensions of a numpy array
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A slight generalization to Peter's answer -- you can specify a range over the original array's shape if you want to go beyond three dimensional arrays.
e.g. to flatten all but the last two dimensions:
arr = numpy.zeros((3, 4, 5, 6))
new_arr = arr.reshape(-1, *arr.shape[-2:])
new_arr.sh...
How does Java handle integer underflows and overflows and how would you check for it?
...type to actually perform the operation and check if the result is still in range for the source type:
public int addWithOverflowCheck(int a, int b) {
// the cast of a is required, to make the + work with long precision,
// if we just added (a + b) the addition would use int precision and
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Why does Java's hashCode() in String use 31 as a multiplier?
...any kind of international charset with common characters outside the ASCII range. At least, I checked this for 31 and German. So I think the choice of 31 is broken.
– Hans-Peter Störr
May 11 '10 at 6:58
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Using Git, show all commits that are in one branch, but not the other(s)
...tration https://git-scm.com/book/en/v2/Git-Tools-Revision-Selection#Commit-Ranges
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Why should I prefer to use member initialization lists?
...uch difference the member initialization list can mak. In the leetcode 303 Range Sum Query - Immutable, https://leetcode.com/problems/range-sum-query-immutable/, where you need to construct and initialize to zero a vector with certain size. Here is two different implementation and speed comparison.
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How do you set a default value for a MySQL Datetime column?
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it's important to note that datetime has a range of 1000-9999, but the range for timestamp is only 1970-2038. this can be a problem if your system has to store birthdates, or you have to handle something like the payment plan for a 30-year mortgage. dev.mysql.com/doc/...
Difference between Char.IsDigit() and Char.IsNumber() in C#
...a few characters that IsDigit() returns true for that are not in the ASCII range of 0x30 to 0x39, such as these Thai digit characters: '๐' '๑' '๒' '๓' '๔' '๕' '๖' '๗' '๘' '๙'.
This snippet of code tells you which code points differ:
static private void test()
{
for (int i =...
How does one generate a random number in Apple's Swift language?
... when using the float functions, how can I include the upper value in the range of possibilities? So lets say I do 0.0 as the lower and 1.0 as the upper. With this logic it will give me 0.0 up to 0.99999999. But instead I'd like to include the 1.0 as a possibility. How can I achieve this?
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\d is less efficient than [0-9]
...ather than [0-9] or \d . I said it was probably more efficient to use a range or digit specifier than a character set.
5...
Remove characters from NSString?
...ring:@""
options:0
range:NSMakeRange(0, string.length)];
this is also useful if you would like the result to be a mutable instance of an input string:
NSMutableString * string = [concreteString mutableCopy];
[string replaceOccurrencesOfStrin...