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Hash String via SHA-256 in Java
..._8));
byte[] digest = md.digest();
String hex = String.format("%064x", new BigInteger(1, digest));
System.out.println(hex);
}
}
In the snippet above, digest contains the hashed string and hex contains a hexadecimal ASCII string with left zero padding.
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Python `if x is not None` or `if not x is None`?
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24
additionally "is not" is less ambiguous in this context "if a is not None and b is None:" vs "if not a is None and b is None:"
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AttributeError: 'module' object has no attribute 'urlopen'
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254
This works in Python 2.x.
For Python 3 look in the docs:
import urllib.request
with urllib.re...
How to fix 'android.os.NetworkOnMainThreadException'?
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Vova Stelmashchuk
56422 silver badges1515 bronze badges
answered Jun 14 '11 at 12:15
Michael SpectorMichael Spector
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In C, how should I read a text file and print all strings
...unks, but without dynamic memory allocation, you can do:
#define CHUNK 1024 /* read 1024 bytes at a time */
char buf[CHUNK];
FILE *file;
size_t nread;
file = fopen("test.txt", "r");
if (file) {
while ((nread = fread(buf, 1, sizeof buf, file)) > 0)
fwrite(buf, 1, nread, stdout);
...
How to get a subset of a javascript object's properties
... ruffin
12.5k77 gold badges6767 silver badges114114 bronze badges
answered Sep 5 '16 at 15:12
Ivan NosovIvan Nosov
9,69522 go...
Convert tuple to list and back
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answered May 6 '14 at 14:27
KhonixKhonix
3,32311 gold badge1111 silver badges1515 bronze badges
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What does appending “?v=1” to CSS and Javascript URLs in link and script tags do?
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answered Aug 12 '10 at 11:14
Nick Craver♦Nick Craver
580k125125 gold badges12551255 silver badges11351135 bronze badges
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How to exit if a command failed?
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426
Try:
my_command || { echo 'my_command failed' ; exit 1; }
Four changes:
Change &&...
Is there a simple way to delete a list element by value?
...element. Use a list comprehension for that.
>>> a = [10, 20, 30, 40, 20, 30, 40, 20, 70, 20]
>>> a = [x for x in a if x != 20]
>>> print(a)
[10, 30, 40, 30, 40, 70]
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