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How to split data into training/testing sets using sample function
...r simple. It does require an id variable in your data set, which is a good idea anyway, not only for creating sets but also for traceability during your project. Add it if doesn't contain already.
mtcars$id <- 1:nrow(mtcars)
train <- mtcars %>% dplyr::sample_frac(.75)
test <- dplyr::an...
How disable Copy, Cut, Select, Select All in UITextView
...ethod of a UISearchBar's subclass but that doesn't work unfortunately. Any ideas for this?
– borchero
Jan 12 '15 at 21:51
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How to use __doPostBack()
... an asyncrhonous postback in ASP.NET using __doPostBack() , but I have no idea how to do it. I want to use vanilla JavaScript.
...
Vim: Close All Buffers But This One
...uilt-in function bufnr("$") that returns last buffer number. but I have no idea to interpolate to string when I use like this :1,bufnr("$")bd. Maybe.. best solution would be :1,9999bd.
– Jinyoung Kim
Dec 21 '15 at 16:37
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How to use PyCharm to debug Scrapy projects
...
intellij idea also work.
create main.py:
#!/usr/bin/env python
# -*- coding: utf-8 -*-
#coding=utf-8
import sys
from scrapy import cmdline
def main(name):
if name:
cmdline.execute(name.split())
if __name__ == '__main_...
How to checkout in Git by date?
... When I execute above command I get error: unknown switch `n' any ideas how to get around this?
– Tim
Apr 18 '19 at 21:05
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Benefits of prototypal inheritance over classical?
...al Classes.
Virtual Base Classes.
Constructors.
Destructors.
You get the idea. The point is that prototypal inheritance is easier to understand, easier to implement, and easier to reason about.
As Steve Yegge puts it in his classical blog post "Portrait of a N00b":
Metadata is any kind of des...
How to load json into my angular.js ng-model?
...is the promise object...I really want to learn more about that. I love the idea of it. The other problem I have been having is basically running a loop on the ajax request so i can constantly "automagically" refresh the page. $timeout has not been working for me.
– MJR_III
...
How to add an image to a JPanel?
...t comes with experience, as one learns each day. Any book can give a basic idea what encapsulation is, but it is how we implement our code that decides how much we adhering to the concept.
– nIcE cOw
Feb 20 '16 at 5:47
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Reorder / reset auto increment primary key
...he ids should then be reassigned in order.
However this is probably a bad idea in most situations. If you have other tables that have foreign keys to this table then it will definitely not work.
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