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E11000 duplicate key error index in mongodb mongoose
... non-sparse index the answer is "yes" in MongoDB. Other databases (such as MySQL) would say "no".
– RickN
Apr 26 at 20:33
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Generate sql insert script from excel worksheet
...ing on the database, you can export to CSV and then use an import method.
MySQL - http://dev.mysql.com/doc/refman/5.1/en/load-data.html
PostgreSQL - http://www.postgresql.org/docs/8.2/static/sql-copy.html
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What's the difference between require and require-dev? [duplicate]
...he package where you're running composer install (what composer terms the "root package"), but not for other packages installed as dependencies.
– Nathan Craike
Apr 1 '16 at 4:27
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How to change root logging level programmatically for logback
...h.qos.logback.classic.Level;
import ch.qos.logback.classic.Logger;
Logger root = (Logger)LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME);
root.setLevel(Level.INFO);
Note that you can also tell logback to periodically scan your config file like this:
<configuration scan="true" scanPeriod="30 ...
Python in Xcode 4+?
...at section by clicking on the triangle pointing to the right.
Type in $(SRCROOT)/ (or $(SOURCE_ROOT)/) and then the name of the Python file you want to test. Remember, the Python program must be in the project folder. Otherwise, you will have to type out the full path (or relative path if it's in a ...
How to overcome root domain CNAME restrictions?
... hosts provide a way to get CNAME-like functionality at the zone apex (the root domain level, for the naked domain name) using a custom record type. Such records include, for example:
ALIAS at DNSimple
ANAME at DNS Made Easy
ANAME at easyDNS
CNAME at CloudFlare
For each provider, the setup is si...
Understanding recursion [closed]
...lly called "left" and "right"; again the children can be nodes, or null. A root is a node that is not the child of any other node.
Imagine that a node, in addition to its children, has a value, a number, and imagine that we wish to sum all the values in some tree.
To sum value in any one node, we ...
AttributeError: 'module' object has no attribute 'tests'
... modules by executing imports statements in djano's interactive console.
$root@13faefes8: python manage.py shell
Type "help", "copyright", "credits" or "license" for more information (InteractiveConsole)
>>> from app.model.notification import Notification
Traceback (most recent call last):...
Why are the Level.FINE logging messages not showing?
...
The Why
java.util.logging has a root logger that defaults to Level.INFO, and a ConsoleHandler attached to it that also defaults to Level.INFO.
FINE is lower than INFO, so fine messages are not displayed by default.
Solution 1
Create a logger for your wh...
How to print binary tree diagram?
... private static Node<Integer> test1() {
Node<Integer> root = new Node<Integer>(2);
Node<Integer> n11 = new Node<Integer>(7);
Node<Integer> n12 = new Node<Integer>(5);
Node<Integer> n21 = new Node<Integer>(2);
...