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How to find out where a function is defined?
...t would be something like:
grep -R "function funName" *
from within the root folder of the project.
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What is the difference between build.sbt and build.scala?
...cala:
import sbt._
import Keys._
object Build extends Build {
lazy val root = Project(id = "root", base = file(".")).settings(
name := "hello",
version := "1.0"
)
}
The .sbt file can also include vals, lazy vals, and defs (but not objects and classes).
See the SBT document cal...
Python and pip, list all versions of a package that's available?
...ved in pip 7
Use pip install -v, you can see all versions that available
root@node7:~# pip install web.py -v
Downloading/unpacking web.py
Using version 0.37 (newest of versions: 0.37, 0.36, 0.35, 0.34, 0.33, 0.33, 0.32, 0.31, 0.22, 0.2)
Downloading web.py-0.37.tar.gz (90Kb): 90Kb downloaded
...
When should I use a NoSQL database instead of a relational database? Is it okay to use both on the s
...roblems where a RDBMS is not a viable solution, for all other things I use MySQL (or SQLite for testing).
If you need a NoSQL db you usually know about it, possible reasons are:
client wants 99.999% availability on
a high traffic site.
your data makes
no sense in SQL, you find yourself
doing mult...
How to manage local vs production settings in Django?
...y
manage.py
The base.py file contains common settings (such as MEDIA_ROOT or ADMIN), while local.py and production.py have site-specific settings:
In the base file settings/base.py:
INSTALLED_APPS = (
# common apps...
)
In the local development settings file settings/local.py:
from pr...
Passing current scope to an AngularJS Service
... promises.
To provoke the $apply, you don't need the scope, you can call $rootScope.$apply, as there is no difference calling it in a specific scope or in the root.
Regarding the variable reading, it would be better if you received parameters. But you could also read it from a scope as an object p...
Parameterize an SQL IN clause
...pe '$'
I prefer this approach to escaping because it works in Oracle and MySQL as well as SQL Server. (I usually use the \ backslash as the escape character, since that's the character we use in regular expressions. But why be constrained by convention!
Those pesky brackets
SQL Server also allo...
How do I change the number of open files limit in Linux? [closed]
...t limits could be set by any user while hard limits are changeable only by root.
Limits are a property of a process. They are inherited when a child process is created so system-wide limits should be set during the system initialization in init scripts and user limits should be set during user login...
Trying to SSH into an Amazon Ec2 instance - permission error
...have a user ubuntu
Amazon's AMI is ec2-user
most Debian images have either root or admin
To login, you need to adjust your ssh command:
ssh -l USERNAME_HERE -i .ssh/yourkey.pem public-ec2-host
HTH
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How are feature_importances in RandomForestClassifier determined?
... if normalizer > 0.0:
# Avoid dividing by zero (e.g., when root is pure)
importances /= normalizer
return importances
Try calculate the feature importance:
print("sepal length (cm)",0)
print("sepal width (cm)",(3*0.444-(0+0)))
print("petal length (cm)",(54* 0.168 ...