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How to call shell commands from Ruby
How do I call shell commands from inside of a Ruby program? How do I then get output from these commands back into Ruby?
20...
Unable to cast object of type 'System.DBNull' to type 'System.String`
...hat column, the return value is System.DBNull.
– Alexander
May 27 '14 at 7:52
In the first case @Alexander mentions -n...
Max length for client ip address [duplicate]
...are 0-255, i.e., one byte). But then you would have to translate going in and out of the DB and that's messy.
IPv6 addresses are 128 bits (as opposed to 32 bits of IPv4 addresses). They are usually written as 8 groups of 4 hex digits separated by colons: 2001:0db8:85a3:0000:0000:8a2e:0370:7334. ...
JavaScript seconds to time string with format hh:mm:ss
... call it on them too. I also found this answer that would remove the hours and minutes if they were not needed.
– alunsford3
May 25 '12 at 5:44
21
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RegEx to extract all matches from string using RegExp.exec
...s an array.
For example:
const str = 'All of us except @Emran, @Raju and @Noman was there';
console.log(
str.match(/@\w*/g)
);
// Will log ["@Emran", "@Raju", "@Noman"]
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imp...
String variable interpolation Java [duplicate]
...ould be $, % or @. Java would only print such characters,
it would not expand them.
Variable interpolation is not supported in Java. Instead of this, we
have string formatting.
package com.zetcode;
public class StringFormatting
{
public static void main(String[] args)
{
int a...
django MultiValueDictKeyError error, how do I deal with it
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Use the MultiValueDict's get method. This is also present on standard dicts and is a way to fetch a value while providing a default if it does not exist.
is_private = request.POST.get('is_private', False)
Generally,
my_var = dict.get(<key>, <default>)
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read subprocess stdout line by line
...ility that is very noisy. I want to store all of the output to a log file and show some of it to the user. I thought the following would work, but the output doesn't show up in my application until the utility has produced a significant amount of output.
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can we use xpath with BeautifulSoup?
I am using BeautifulSoup to scrape a url and I had the following code
9 Answers
9
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scheduleAtFixedRate vs scheduleWithFixedDelay
What's the main difference between scheduleAtFixedRate and scheduleWithFixedDelay methods of ScheduledExecutorService ?
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