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Best way to generate random file names in Python
...f uniform length can be generated by using MD5 hashes of the current time:
from hashlib import md5
from time import localtime
def add_prefix(filename):
prefix = md5(str(localtime()).encode('utf-8')).hexdigest()
return f"{prefix}_{filename}"
Calls to the add_prefix('style.css') generates se...
How to implement the Android ActionBar back button?
...ItemId()) {
case android.R.id.home:
NavUtils.navigateUpFromSameTask(this);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
The function NavUtils.navigateUpFromSameTask(this) requires you to define the parent acti...
How do I convert a string to a number in PHP?
...
It was useful for me when I had a month number obtained from a full date string, wich I used to pull a value from a moth names array. Auto casting doesn't happen here because string indexes are valid, but not equivalent.
– Cazuma Nii Cavalcanti
...
Get MD5 hash of big files in Python
...
Below I've incorporated suggestion from comments. Thank you al!
python < 3.7
import hashlib
def checksum(filename, hash_factory=hashlib.md5, chunk_num_blocks=128):
h = hash_factory()
with open(filename,'rb') as f:
for chunk in iter(lambd...
How to resize a custom view programmatically?
I am coding a custom view, extended from RelativeLayout, and I want to resize it programmatically, How can I do?
14 Answers...
What are the differences between “generic” types in C++ and Java?
...arrays and such.
Java doesn't work like that. In Java all objects extent from java.lang.Object so, pre-Generics, you'd write code like this:
public class PhoneNumbers {
private Map phoneNumbers = new HashMap();
public String getPhoneNumber(String name) {
return (String)phoneNumbers.get(n...
differences between 2 JUnit Assert classes
...
I believe they are refactoring from junit.framework to org.junit and junit.framework.Assert is maintained for backwards compatibility.
share
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improve th...
Can I use if (pointer) instead of if (pointer != NULL)?
...verted into boolean false while non-null pointers are converted into true. From the C++11 standard, section on Boolean Conversions:
A prvalue of arithmetic, unscoped enumeration, pointer, or pointer to member type can be converted to a
prvalue of type
bool. A zero value, null pointer value, ...
How to properly reuse connection to Mongodb across NodeJs application and modules
...p another instance of the connection or simply use the existing connection from source?
– Farhan Ahmad
Feb 9 '15 at 2:59
20
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How best to determine if an argument is not sent to the JavaScript function
...catenation, but really fast if the second one was created as an assignment from the the first. So it probably works by a pointer test followed by letter by letter testing So, yeah, I was full of crap :) thanks for enlightening me...
– Juan Mendes
Jan 18 '11 at...