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Explain the use of a bit vector for determining if all characters are unique
...y int is an array of bits (flag). Each bit in your code states whether the character with bit's index was found in string or not. You could use bit vector for the same reason instead of int. There are two differences between them:
Size. int has fixed size, usually 4 bytes which means 8*4=32 bits (...
Reasons for using the set.seed function
...
The char2seed function in the TeachingDemos package allows you to set the seed (or choose a seed to pass into set.seed) based on a character string. For example you could have students use their name as the seed then each studen...
Resize fields in Django Admin
... some cases, is a real waste of space, when, i.e., editing a date field, 8 characters wide, or a CharField, also 6 or 8 chars wide, and then the edit box goes up to 15 or 20 chars.
...
Getting MAC Address
...8927, struct.pack('256s', ifname[:15]))
return ':'.join(['%02x' % ord(char) for char in info[18:24]])
print getHwAddr('eth0')
This is the Python 3 compatible code:
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import fcntl
import socket
import struct
def getHwAddr(ifname):
s = socke...
How to manually expand a special variable (ex: ~ tilde) in bash
...safer and better solutions. Preferably, I'd go with either of these two:
Charle's Duffy's solution
Håkon Hægland's solution
Original answer for historic purposes (but please don't use this)
If I'm not mistaken, "~" will not be expanded by a bash script in that manner because it is treated a...
Use of #pragma in C
...etween members) in MSVC:
#pragma pack(push, 1)
struct PackedStructure
{
char a;
int b;
short c;
};
#pragma pack(pop)
// sizeof(PackedStructure) == 7
Here's how you'd do the same thing in GCC:
struct PackedStructure __attribute__((__packed__))
{
char a;
int b;
short c;
};
// sizeof(Pa...
How do I split a string on a delimiter in Bash?
...restored"; you don't need to do anything manually.
– Charles Duffy
Jul 6 '13 at 14:39
5
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html select option separator
...And if you want to be really fancy, use the horizontal unicode box drawing character.
(BEST OPTION!)
<select>
<option>First</option>
<option disabled>──────────</option>
<option>Second</option>
<option>Third...
The entity type is not part of the model for the current context
...base doesn't appropriately map to a code first model. Specifically I had a char(1) in the database table and a char in C#. Changing the model to a string resolved the problem.
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Java how to replace 2 or more spaces with single space in string and delete leading and trailing spa
...pace - it just hides it by moving the start and end values. The underlying char[] remains unchanged.)
– corsiKa
May 28 '10 at 21:02
2
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