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how to check the dtype of a column in python pandas
...ol'). It may be used even for selecting groups of columns based on dtype:
test = pd.DataFrame({'bool' :[False, True], 'int64':[-1,2], 'int32':[-1,2],'float': [-2.5, 3.4],
'compl':np.array([1-1j, 5]),
'dt' :[pd.Timestamp('2013-01-02'), pd.Timestamp('2016-1...
Makefile variable as prerequisite
... variant
In my makefiles, I normally use an expression like:
deploy:
test -n "$(ENV)" # $$ENV
rsync . $(ENV).example.com:/var/www/myapp/
The reasons:
it's a simple one-liner
it's compact
it's located close to the commands which use the variable
Don't forget the comment which is impo...
Find and restore a deleted file in a Git repository
...t where you know the file existed>
Now it's time to run the automated test. The shell command '[ -e foo.bar ]' will return 0 if foo.bar exists, and 1 otherwise. The "run" command of git-bisect will use binary search to automatically find the first commit where the test fails. It starts halfway ...
Detect if device is iOS
...l answers below needs to take that into account now.
This might be the shortest alternative that also covers iOS 13:
function iOS() {
return [
'iPad Simulator',
'iPhone Simulator',
'iPod Simulator',
'iPad',
'iPhone',
'iPod'
].includes(navigator.platform)
// iPad on iOS ...
How to get parameters from a URL string?
...s all the variables into an associative array.
$url = "https://mysite.com/test/1234?email=xyz4@test.com&testin=123";
$query_str = parse_url($url, PHP_URL_QUERY);
parse_str($query_str, $query_params);
print_r($query_params);
//Output: Array ( [email] => xyz4@test.com [testin] => 123 )
...
C# - Keyword usage virtual+override vs. new
... Foo
{
public new bool DoSomething() { return true; }
}
public class Test
{
public static void Main ()
{
Foo test = new Bar ();
Console.WriteLine (test.DoSomething ());
}
}
This prints false, if you used override it would have printed true.
(Base code taken from ...
Can you change what a symlink points to after it is created?
... a symlink and thus update the pathname referenced by it:
$ ln -s .bashrc test
$ ls -al test
lrwxrwxrwx 1 pascal pascal 7 2009-09-23 17:12 test -> .bashrc
$ ln -s .profile test
ln: creating symbolic link `test': File exists
$ ln -s -f .profile test
$ ls -al test
lrwxrwxrwx 1 pascal pascal 8 2009...
TypeError: module.__init__() takes at most 2 arguments (3 given)
...================================
___________________ ERROR collecting tests/test_geojson.py ____________________
test_geojson.py:2: in (module)
from pyexample.responses import GeoJsonResponse ..\pyexample\responses \GeoJsonResponse.py:12: in (module)
class GeoJsonResponse(Respo...
run main class of Maven project [duplicate]
...
You can also add -Dexec.classpathScope=test if the class is in the test directories
– M Smith
Mar 7 '14 at 22:47
1
...
git diff renamed file
...4
--- a/a.txt
+++ b/a.txt
@@ -1 +1 @@
-hello
+goodbye
diff --git a/a.txt b/test/a.txt
similarity index 100%
copy from a.txt
copy to test/a.txt
Incidentally, if you restrict your diff to just one path (as you do in git diff HEAD^^ HEAD a.txt you aren't ever going to see the renames or copies becaus...