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How can I use Python to get the system hostname?
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Use socket and its gethostname() functionality. This will get the hostname of the computer where the Python interpreter is running:
import socket
print(socket.gethostname())
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How to get the PATH environment-variable separator in Python?
...ries need to be concatenated, as in an executable search path, there is an os-dependent separator character. For Windows it's ';' , for Linux it's ':' . Is there a way in Python to get which character to split on?
...
Write a number with two decimal places SQL server
...ters to display, and the number of decimal places to display
Select Str(12345.6789, 12, 3)
displays: ' 12345.679' ( 3 spaces, 5 digits 12345, a decimal point, and three decimal digits (679). - it rounds if it has to truncate, (unless the integer part is too large for the total size, in whic...
How to read/write from/to file using Go?
...to read and write files in Go.
Because file API has changed recently and most other answers don't work with Go 1. They also miss bufio which is important IMHO.
In the following examples I copy a file by reading from it and writing to the destination file.
Start with the basics
package main
impo...
How to use the C socket API in C++ on z/OS
...'m having issues getting the C sockets API to work properly in C++ on z/OS .
9 Answers
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Technically, why are processes in Erlang more efficient than OS threads?
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There are several contributing factors:
Erlang processes are not OS processes. They are implemented by the Erlang VM using a lightweight cooperative threading model (preemptive at the Erlang level, but under the control of a cooperatively scheduled runtime). This means that it is much chea...
jQuery deferreds and promises - .then() vs .done()
...tion (x) { // Suppose promise returns "abc"
console.log(x);
return 123;
}).then(function (x){
console.log(x);
}).then(function (x){
console.log(x)
})
The following results will get logged:
abc
123
undefined
While
promise.done(function (x) { // Suppose promise returns "abc"
...
Why does Javascript's regex.exec() not always return the same value? [duplicate]
...ignment as the loop condition.
var re = /foo_(\d+)/g,
str = "text foo_123 more text foo_456 foo_789 end text",
match,
results = [];
while (match = re.exec(str))
results.push(+match[1]);
DEMO: http://jsfiddle.net/pPW8Y/
If you don't like the placement of the assignment, the loo...
linux svn搭建配置及svn命令详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...asswd
[users]
# harry = harryssecret
# sally = sallyssecret
hello=123
用户名=密码
这样我们就建立了hello用户， 123密码
2.2 再设置权限authz
[root@www ~]# vi authz
[/]
hello= rw
意思是hello用户对所有的目录有读写权限，当然也...