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Can I use __init__.py to define global variables?
... It's asking about variables, not constants. How python treats variable inside package? What If variable inside package has been changed?
– TomSawyer
Dec 22 '17 at 20:13
add a...
When vectors are allocated, do they use memory on the heap or the stack?
... uses internally to store the items will be on the heap. The items will reside in that array.
vector<Type> *vect = new vector<Type>; //allocates vect on heap and each of the Type will be allocated on stack
No. Same as above, except the vector class will be on the heap as well.
vec...
Formatting a number with exactly two decimals in JavaScript
...imal places. But I get numbers like this: 10.8, 2.4, etc. These are not my idea of two decimal places so how I can improve the following?
...
Calling shell functions with xargs
...ould be simplified to
bash -c 'echo_var "{}"'
moving the {} directly inside it. But it's vulnerable to command injection as pointed out by @Sasha.
Here is an example why you should not use the embedded format:
$ echo '$(date)' | xargs -I {} bash -c 'echo_var "{}"'
Sun Aug 18 11:56:45 CDT 2019
...
How can I build multiple submit buttons django form?
... use self.data in the clean_email method to access the POST data before validation. It should contain a key called newsletter_sub or newsletter_unsub depending on which button was pressed.
# in the context of a django.forms form
def clean(self):
if 'newsletter_sub' in self.data:
# do s...
How can I read a whole file into a string variable
... The question doesn't ask for a byte array.
– Kyle Bridenstine
Sep 10 '19 at 16:24
Using this to open a html file and ...
'float' vs. 'double' precision
...ch base they use internally, so in other words, an implementation could decide to make it based on 18 digits of precision in base 3). [1]
If you need to know these values, the constants FLT_RADIX and FLT_MANT_DIG (and DBL_MANT_DIG / LDBL_MANT_DIG) are defined in float.h.
The reason it's called a d...
How can I count the number of matches for a regex?
...lete example:
import java.util.regex.*;
class Test {
public static void main(String[] args) {
String hello = "HelloxxxHelloxxxHello";
Pattern pattern = Pattern.compile("Hello");
Matcher matcher = pattern.matcher(hello);
int count = 0;
while (matcher.fin...
Case-INsensitive Dictionary with string key-type in C#
...
This seemed related, but I didn't understand it properly: c# Dictionary: making the Key case-insensitive through declarations
It is indeed related. The solution is to tell the dictionary instance not to use the standard string compare method (which is...
Facebook Like Button - how to disable Comment pop up?
...
Simplest fix to hide the comment box after Facebook Like (XFBML version not the iframe one) is as given:
.fb_edge_widget_with_comment span.fb_edge_comment_widget iframe.fb_ltr {
display: none !important;
}
Put the CSS style in any of y...