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What does ^M character mean in Vim?
...dows, Ctrl+V will probably be mapped to paste. If that's the case the defaults remap the "special character escape" key it to Ctrl+Q.
– R. Martinho Fernandes
May 1 '11 at 17:45
9
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How do you find the sum of all the numbers in an array in Java?
...ring[] args) {
int[] ia = new int[101];
for (int i = 0; i < ia.length; i++) ia[i] = i;
int sum = 0;
for (int e : ia) sum += e;
System.out.println(sum);
}
}
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...
How to convert PascalCase to pascal_case?
...123String' => 'test123_string',
);
foreach ($tests as $test => $result) {
$output = from_camel_case($test);
if ($output === $result) {
echo "Pass: $test => $result\n";
} else {
echo "Fail: $test => $result [$output]\n";
}
}
function from_camel_case($input) {
preg_matc...
How to trigger event when a variable's value is changed?
...
you can use generic class:
class Wrapped<T> {
private T _value;
public Action ValueChanged;
public T Value
{
get => _value;
set
{
OnValueChanged();
_value = value;
}
}
prot...
Building vs. Compiling (Java)
...tegration tests, etc).
Packaging (into jar, war, ejb-jar, ear).
Running health checks (static analyzers like Checkstyle, Findbugs, PMD, test coverage, etc).
Generating reports.
So as you can see, compiling is only a (small) part of the build (and the best practice is to fully automate all the step...
How to set up a PostgreSQL database in Django
...nstall psycopg2
Configuration
in settings.py
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql',
'NAME': 'db_name',
'USER': 'db_user',
'PASSWORD': 'db_user_password',
'HOST': '',
'PORT': 'db_port_number...
Stop the 'Ding' when pressing Enter
...Check out the Form.AcceptButton property. You can use it to specify a default button for a form, in this case for pressing enter.
From the docs:
This property enables you to designate
a default action to occur when the
user presses the ENTER key in your
application. The button assigned t...
How to get current path with query string using Capybara
...xpect(page).to have_current_path(people_path, only_path: true) # Capybara < 2.16
expect(page).to have_current_path(people_path, ignore_query: true) # Capybara >= 2.16
If wanting to match the full url
expect(page).to have_current_path(people_url, url: true) # Capybara < 2.16
expect(page)....
Upgrade python packages from requirements.txt using pip command
...
This would upgrade lxml to any version newer than 2.2.0
lxml>=2.2.0,<2.3.0
This would upgrade lxml to the most recent version between 2.2.0 and 2.3.0.
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Given an emacs command name, how would you find key-bindings ? (and vice versa)
...nd, you can use emacs help's "where-is" feature
C-h w command-name
If multiple bindings are set for the command they will all be listed.
For the inverse, given a key sequence, you can type
C-h k key-sequence
To get the command that would run.
You can get detailed information about a comman...