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How to check if a particular service is running on Ubuntu
...anks. The documentation doesn't say what the symbols next to each service mean. I'd guess that "+" means it's running and "-" means it isn't... then there's the "?" next to many. + means running?
– Oscar
Feb 18 '14 at 2:39
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Is it possible to display inline images from html in an Android TextView?
...mageGetter {
public Drawable getDrawable(String source) {
int id;
if (source.equals("stack.jpg")) {
id = R.drawable.stack;
}
else if (source.equals("overflow.jpg")) {
id = R.drawable.overflow;
}
else {
return n...
The difference between try/catch/throw and try/catch(e)/throw e
...
The first preserves the stack trace while the second resets it. This means that if you use the second approach the stack trace of the exception will always start from this method and you will lose the original exception trace which could be disastrous for someone reading exception logs as he w...
Running a cron job on Linux every six hours
...t's the hour you need to care about
0 */6 * * * /path/to/mycommand
This means every sixth hour starting from 0, i.e. at hour 0, 6, 12 and 18 which you could write as
0 0,6,12,18 * * * /path/to/mycommand
share
|...
How to check edittext's text is email address or not?
...
/**
* method is used for checking valid email id format.
*
* @param email
* @return boolean true for valid false for invalid
*/
public static boolean isEmailValid(String email) {
String expression = "^[\\w\\.-]+@([\\w\\-]+\\.)+[A-Z]{2,4}$";
Pattern ...
SQL Server - Return value after INSERT
...INSERT-statement.
Example:
I've got a table with the attributes name and id. id is a generated value.
13 Answers
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Using SSH keys inside docker container
...d command
$ docker build -t example --build-arg ssh_prv_key="$(cat ~/.ssh/id_rsa)" --build-arg ssh_pub_key="$(cat ~/.ssh/id_rsa.pub)" --squash .
Dockerfile
FROM python:3.6-slim
ARG ssh_prv_key
ARG ssh_pub_key
RUN apt-get update && \
apt-get install -y \
git \
openss...
Django ManyToMany filter()
...
Just restating what Tomasz said.
There are many examples of FOO__in=... style filters in the many-to-many and many-to-one tests. Here is syntax for your specific problem:
users_in_1zone = User.objects.filter(zones__id=<id1>)
# same thing but us...
Javascript - Append HTML to container element without innerHTML
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@kennydelacruz: The OP didn't want to append new HTML to an existing HTML because it destroys and recreates the existing elements. The OP found a solution by creating a new element and append that but they didn't want to add an additional element. I...
Are there any standard exit status codes in Linux?
...e an exit status of 2 to indicate an error, and use an exit status of 1 to mean that no selected lines were found.
– NamshubWriter
Oct 25 '12 at 17:06
3
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