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What is “2's Complement”?
... binary.
It basically says,
for zero, use all 0's.
for positive integers, start counting up, with a maximum of 2(number of bits - 1)-1.
for negative integers, do exactly the same thing, but switch the role of 0's and 1's (so instead of starting with 0000, start with 1111 - that's the "complement" p...
What is the difference between URI, URL and URN? [duplicate]
... (A relative URL, only useful in the context of another URL)
URLs always start with a protocol (http) and usually contain information such as the network host name (example.com) and often a document path (/foo/mypage.html). URLs may have query parameters and fragment identifiers.
URN -- Uniform R...
How to get a path to a resource in a Java JAR file
...JAR, especially if a JAR (or any program, for that matter) is run from the Start Menu under Windows. So here is what I did, and it works for .class files run from outside a JAR just as well as it works for a JAR. (I only tested it under Windows 7.)
try {
//Attempt to get the path of the actual ...
Creating a byte array from a stream
... the stream or your specified size, but you still have to know the size to start with.
The above method will keep reading (and copying into a MemoryStream) until it runs out of data. It then asks the MemoryStream to return a copy of the data in an array. If you know the size to start with - or thin...
Make sure only a single instance of a program is running
... in Ubuntu 16. And killing the process by any means allowed another one to start. Dimon I think you did something wrong in your test. (Perhaps you forgot to make your script sleep after the above code ran, so it immediately exited and released the socket.)
– Luke
...
Hook up Raspberry Pi via Ethernet to laptop without router? [closed]
...n my case because 10.42.0.1 is my laptop
$nmap -n -sP 10.42.0.255/24
Starting Nmap 6.40 ( http://nmap.org ) at 2016-02-20 23:07 CET
Nmap scan report for 10.42.0.1
Host is up (0.00031s latency).
Nmap scan report for 10.42.0.96
Host is up (0.0023s latency).
Nmap done: 256 IP addresses ...
How to stop an unstoppable zombie job on Jenkins without restarting the server?
...
I had this with a Pipeline job that started other jobs. The server crashed, the other jobs were gone, but the pipeline job was still a zombie. I first tried the accepted answer, to no avail. I had to run @Alexandru's command several times, each time I saw the p...
What do linkers do?
...tion .data
hello_world db "Hello world!", 10
section .text
global _start
_start:
; sys_write
mov rax, 1
mov rdi, 1
mov rsi, hello_world
mov rdx, 13
syscall
; sys_exit
mov rax, 60
mov rdi, 0
syscall
compil...
How to loop through files matching wildcard in batch file
...
The code below filters filenames starting with given substring. It could be changed to fit different needs by working on subfname substring extraction and IF statement:
echo off
rem filter all files not starting with the prefix 'dat'
setlocal enabledelayede...
django test app error - Got an error creating the test database: permission denied to create databas
... 'TEST': {
'NAME': 'test_finance',
},
}
}
start MySQL shell as the root user:
mysql -u root -p
and now grant all privileges to this non-existing database in MySQL:
GRANT ALL PRIVILEGES ON test_finance.* TO 'django'@'localhost';
Now Django will start tests witho...