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Create thumbnail image
... For those who use HttpResponseMessage: response.Content = new ByteArrayContent(memoryStream.ToArray());
– Hp93
Jun 8 '18 at 4:00
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Double not (!!) operator in PHP
...ns that for any true value (numbers other than zero, non-empty strings and arrays, etc.) you will get the boolean value TRUE, and for any false value (0, 0.0, NULL, empty strings or empty arrays) you will get the boolean value FALSE.
It is functionally equivalent to a cast to boolean:
return (bool...
How to sort a list of lists by a specific index of the inner list?
...hink this answer is very important. I think people trying to sort by inner array indexes will fall here but people looking to sort by MULTIPLE inner array indexes will start here and your answer helped me see that itemgetter will actually do that for you!
– ZekeDroid
...
PHP substring extraction. Get the string before the first '/' or the whole string
...ement itself - echo explode('/',$mystring,2)[0];. Since explode returns an array, I should be able to do it right? But I get an error. Any suggestions?
– anon355079
Dec 20 '09 at 14:17
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How do you reverse a string in place in C or C++?
... the middle. Swap as you go.
Reverse ASCII string, i.e. a 0-terminated array where every character fits in 1 char. (Or other non-multibyte character sets).
void strrev(char *head)
{
if (!head) return;
char *tail = head;
while(*tail) ++tail; // find the 0 terminator, like head+strlen
...
const char* concatenation
...ing one.
will not work. Instead you should have a separate variable(char array) to hold the result. Something like this:
char result[100]; // array to hold the result.
strcpy(result,one); // copy string one into the result.
strcat(result,two); // append string two to the result.
...
How to make a flat list out of list of lists?
...ertools.chain.from_iterable(a))
def numpy_flat(a):
return list(numpy.array(a).flat)
def numpy_concatenate(a):
return list(numpy.concatenate(a))
perfplot.show(
setup=lambda n: [list(range(10))] * n,
# setup=lambda n: [list(range(n))] * 10,
kernels=[
forfor,
s...
Combine multiple Collections into a single logical Collection?
Assume, I have a constant number of collections (e.g. 3 ArrayLists) as members of a class. Now, I want to expose all the elements to other classes so they can simply iterate over all elements (ideally, read only).
I'm using guava collections and I wonder how I could use guava iterables/iterators to ...
schema builder laravel migrations unique on two columns
...
The second param is to manually set the name of the unique index. Use an array as the first param to create a unique key across multiple columns.
$table->unique(array('mytext', 'user_id'));
or (a little neater)
$table->unique(['mytext', 'user_id']);
...
Label encoding across multiple columns in scikit-learn
...
As mentioned by larsmans, LabelEncoder() only takes a 1-d array as an argument. That said, it is quite easy to roll your own label encoder that operates on multiple columns of your choosing, and returns a transformed dataframe. My code here is based in part on Zac Stewart's excellen...