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Why is using 'eval' a bad practice?
...s, using eval is a bad practice. Just to name a few reasons:
There is almost always a better way to do it
Very dangerous and insecure
Makes debugging difficult
Slow
In your case you can use setattr instead:
class Song:
"""The class to store the details of each song"""
attsToStore=('Name...
Pass all variables from one shell script to another?
...
MESSAGE="hello"
export MESSAGE
./b.py
b.py:
#!/usr/bin/python
import os
print 'The message is:', os.environ['MESSAGE']
Sourcing:
Instead we could source like this:
a.sh:
#!/bin/sh
MESSAGE="hello"
. ./b.sh
b.sh:
#!/bin/sh
echo "The message is: $MESSAGE"
Then:
$ ./a.sh
The message...
Will HTML5 allow web apps to make peer-to-peer HTTP connections?
Is it possible to create a web app that, with the help of a central server, could create direct connections with other users of the same web app? I'm imagining a process similar to UDP hole punching.
...
How do I get the current time zone of MySQL?
...efault_timezone_set), which means it may report a different value than the OS is using. If you're in control of the PHP code, you should know whether you're doing that and be okay.
But the whole question of what timezone the MySQL server is using may be a tangent, because asking the server what tim...
Read a text file using Node.js?
...g system. However, reading the file as such requires you to do your own (possibly) incremental parsing/processing of the file and some amount of buffering might be inevitable.
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Can I change the root EBS device of my amazon EC2 instance?
...ernate EBS volume as the root: /dev/sda1
Start the instance.
This presupposes that your alternate EBS volume is bootable, of course - it has to contain the bootable OS image.
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How to make Java honor the DNS Caching Timeout?
...e. Through some DNS magic, the domain name is resolved into an IP that's closest to the server with least load. For the load-balancing to work, the application server needs to honor the TTL from DNS response and to resolve the domain name again when cache times out. However, I couldn't figure out a ...
Difference between onStart() and onResume()
...rt() and onCreate() methods just excluding onStart() ? What is its purpose?
12 Answers
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When to use AtomicReference in Java?
...reference, for which monitor-based synchronization is not appropriate. Suppose you want to check to see if a specific field only if the state of the object remains as you last checked:
AtomicReference<Object> cache = new AtomicReference<Object>();
Object cachedValue = new Object();
cac...
How do I trap ctrl-c (SIGINT) in a C# console app
...
This works but it doesn't trap the closing of the window with the X. See my complete solution below. works with kill as well
– JJ_Coder4Hire
Apr 10 '14 at 18:53
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