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How to write multiple line string using Bash with variables?
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The syntax (<<<) and the command used (echo) is wrong.
Correct would be:
#!/bin/bash
kernel="2.6.39"
distro="xyz"
cat >/etc/myconfig.conf <<EOL
line 1, ${kernel}
line 2,
line 3, ${distro}
line 4 line
...
EOL
cat /etc/myconfig.c...
slf4j: how to log formatted message, object array, exception
What is the correct approach to log both a populated message and a stack trace of the exception?
2 Answers
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how to add records to has_many :through association in rails
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@Mischa how should i handle error if House.find(params[:house_id]) is nill.. i got error of TypeMismatch if params[:house_id] is nil.. i already using rescue. but is there any better_way..??
– Vishal
Jul 30...
Using Regular Expressions to Extract a Value in Java
...blic static void main(String[] args) {
// create matcher for pattern p and given string
Matcher m = p.matcher("Testing123Testing");
// if an occurrence if a pattern was found in a given string...
if (m.find()) {
// ...then you can use group() methods.
System.out.prin...
nodejs get file name from absolute path?
...ered May 24 '18 at 6:24
Rubin bhandariRubin bhandari
1,05499 silver badges1515 bronze badges
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Gradle buildscript dependencies
...es. These are the dependencies that are put on the classpath of your build and that you can refer to from your build file. For instance extra plugins that exist on the internet.
The repositories on the root level are used to fetch the dependencies that your project depends on. So all the dependenci...
How to create a memory leak in Java?
I just had an interview, and I was asked to create a memory leak with Java.
Needless to say, I felt pretty dumb having no clue on how to even start creating one.
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Log4net rolling daily filename with date in the file name
... <preserveLogFileNameExtension value="true" /> is the correct syntax and this is a great answer. How did the loss occur, may I ask?
– Larry B
Feb 12 '18 at 14:48
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Efficient way to rotate a list in python
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A collections.deque is optimized for pulling and pushing on both ends. They even have a dedicated rotate() method.
from collections import deque
items = deque([1, 2])
items.append(3) # deque == [1, 2, 3]
items.rotate(1) # The deque is now: [3, 1, 2]
item...
How do I check for C++11 support?
...amed __cplusplus that C++ compilers should set to the version of the C++ standard supported see this
#if __cplusplus <= 199711L
#error This library needs at least a C++11 compliant compiler
#endif
It is set to 199711L in Visual Studio 2010 SP1, but I do not know if vendors will be so bold to...