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NPM global install “cannot find module”
...ronment variable depends on your operating system. I'm using a flavour of Linux, so I used export NODE_PATH=... to set it in the local shell such that it is exported to commands run in that shell. To make the change persistent or available to all shells, put it in .profile or similar. The concept...
How can I generate a unique ID in Python? [duplicate]
...
You might want Python's UUID functions:
21.15. uuid — UUID objects according to RFC 4122
eg:
import uuid
print uuid.uuid4()
7d529dd4-548b-4258-aa8e-23e34dc8d43d
...
How to do a scatter plot with empty circles in Python?
In Python, with Matplotlib, how can a scatter plot with empty circles be plotted? The goal is to draw empty circles around some of the colored disks already plotted by scatter() , so as to highlight them, ideally without having to redraw the colored circles.
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Logic to test that 3 of 4 are True
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If this had been Python, I would have written
if [a, b, c, d].count(True) == 3:
Or
if [a, b, c, d].count(False) == 1:
Or
if [a, b, c, d].count(False) == True:
# In Python True == 1 and False == 0
Or
print [a, b, c, d].count(0) == 1
...
Get the IP address of the machine
... local computer -Question. However I need to find the IP address(es) of a Linux Machine .
12 Answers
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Please explain the exec() function and its family
... not exec() in that they don't have to copy an entire process space. Under Linux, fork() only makes a copy of the page tables and a new task structure, exec() will do the grunt work of "separating" the memory of the two processes.
If the exec is called following fork (and this is what happens mostly...
How to concatenate stdin and a string?
... Looks cool except -J doesn't seem to be standard/common. On Linux (where xargs is part of GNU findutils) I get the error: xargs: invalid option -- 'J' Which system is this on?
– arielf
Jul 21 '16 at 1:03
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What browsers support HTML5 WebSocket API?
...n PHP:
Ratchet
phpwebsocket.
Extendible Web Socket Server
phpdaemon
In Python:
pywebsockets
websockify
gevent-websocket, gevent-socketio and flask-sockets based on the former
Autobahn
Tornado
In C:
libwebsockets
In Node.js:
Socket.io : Socket.io also has serverside ports for Python, Ja...
Which terminal command to get just IP address and nothing else?
... MAC:
ifconfig | grep "inet " | grep -v 127.0.0.1 | cut -d\ -f2
Or for linux system
hostname -i | awk '{print $3}' # Ubuntu
hostname -i # Debian
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How to check if a file exists in Go?
...not have a function solely intended to check if a file exists or not (like Python's os.path.exists ). What is the idiomatic way to do it?
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