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How do I retrieve the number of columns in a Pandas data frame?
... my guess is that it does not call a function but just reads the attribute from memory?
– mkln
Nov 30 '13 at 18:59
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What are Flask Blueprints, exactly?
...version of its structure in the plaster of your application.
# An example
from flask import Blueprint
tree_mold = Blueprint("mold", __name__)
@tree_mold.route("/leaves")
def leaves():
return "This tree has leaves"
@tree_mold.route("/roots")
def roots():
return "And roots as well"
@tree_...
Design by contract using assertions or exceptions? [closed]
...t they are calling a function with a condition breach, but don't stop them from using it if they feel they know better. The breach could cause exceptions to occur, but I see that as a different thing.
– Matt_JD
May 22 '11 at 7:45
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Disable IntelliJ Starred (Package) Imports?
... it becomes really difficult to figure out which package a class is coming from.
– Gili
Apr 8 '18 at 16:44
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How to write a switch statement in Ruby
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Many programming languages, especially those derived from C, have support for the so-called Switch Fallthrough. I was searching for the best way to do the same in Ruby and thought it might be useful to others:
In C-like languages fallthrough typically looks like this:
switch ...
How do I link a JavaScript file to a HTML file?
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First you need to download JQuery library from http://jquery.com/ then
load the jquery library the following way within your html head tags
then you can test whether the jquery is working by coding your jquery code after the jquery loading script
<!DOCTYPE html...
How do I undo the most recent local commits in Git?
...-c ORIG_HEAD will open an editor, which initially contains the log message from the old commit and allows you to edit it. If you do not need to edit the message, you could use the -C option.
Beware, however, that if you have added any new changes to the index, using commit --amend will add them to ...
Find Oracle JDBC driver in Maven repository
...omputer repository with (note I pulled the groupId, artifactId and version from the POM):
mvn install:install-file -DgroupId=com.oracle -DartifactId=ojdbc14 \
-Dversion=10.2.0.3.0 -Dpackaging=jar -Dfile=ojdbc.jar -DgeneratePom=true
The last parameter for generating a POM will save you from p...
sendmail: how to configure sendmail on ubuntu? [closed]
...ing the following into the command line:
$ echo "My test email being sent from sendmail" | /usr/sbin/sendmail myemail@domain.com
The following will allow you to add smtp relay to sendmail:
#Change to your mail config directory:
cd /etc/mail
#Make a auth subdirectory
mkdir auth
chmod 700 auth
#...
How to use multiple @RequestMapping annotations in spring?
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From my test (spring 3.0.5), @RequestMapping(value={"", "/"}) - only "/" works, "" does not. However I found out this works: @RequestMapping(value={"/", " * "}), the " * " matches anything, so it will be the default handler ...