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&& (AND) and || (OR) in IF statements
...
206
No, it will not be evaluated. And this is very useful. For example, if you need to test whether...
How to get the start time of a long-running Linux process?
... PID CMD STARTED
1 Tue Jun 7 01:29:38 2016 /sbin/init
2 Tue Jun 7 01:29:38 2016 [kthreadd]
3 Tue Jun 7 01:29:38 2016 [ksoftirqd/0]
5 Tue Jun 7 01:29:38 2016 [kworker/0:0H]
...
Java code To convert byte to Hexadecimal
...
byte[] bytes = {-1, 0, 1, 2, 3 };
StringBuilder sb = new StringBuilder();
for (byte b : bytes) {
sb.append(String.format("%02X ", b));
}
System.out.println(sb.toString());
// prints "FF 00 01 02 03 "
See also
java...
Getting a random value from a JavaScript array
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edited Jul 24 at 5:06
tamil arasan
111 bronze badge
answered Dec 29 '10 at 0:06
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How do I delete a fixed number of rows with sorting in PostgreSQL?
...d IN (
SELECT ctid
FROM logtable
ORDER BY timestamp
LIMIT 10
)
The ctid is:
The physical location of the row version within its table. Note that although the ctid can be used to locate the row version very quickly, a row's ctid will change if it is updated or moved by VACUUM FU...
Failed to Attach to Process ID Xcode
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answered Oct 10 '12 at 12:49
Robert ZahmRobert Zahm
1,86722 gold badges1212 silver badges88 bronze badges
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Strange \n in base64 encoded string in Ruby
...at confusing, the b64encode method is supposed to add a newline for every 60th character, and the example for the encode64 method is actually using the b64encode method.
It seems the pack("m") method for the Array class used by encode64 also adds the newlines. I would consider it a design bug that ...
Download file from web in Python 3
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+50
If you want to obtain the contents of a web page into a variable, just read the response of urllib.request.urlopen:
import urllib.requ...
Can you run GUI applications in a Docker container?
...n made with this Dockerfile:
# Firefox over VNC
#
# VERSION 0.1
# DOCKER-VERSION 0.2
FROM ubuntu:12.04
# Make sure the package repository is up to date
RUN echo "deb http://archive.ubuntu.com/ubuntu precise main universe" > /etc/apt/sources.list
RUN apt-get updat...
A list of indices in MongoDB?
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answered May 7 '10 at 22:52
mdirolfmdirolf
6,63822 gold badges2020 silver badges1515 bronze badges
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