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Numpy - add row to array
... = array([[0, 1, 2], [1, 2, 0], [2, 1, 2], [3, 2, 0]])
add to A all rows from X where the first element < 3:
import numpy as np
A = np.vstack((A, X[X[:,0] < 3]))
# returns:
array([[0, 1, 2],
[0, 2, 0],
[0, 1, 2],
[1, 2, 0],
[2, 1, 2]])
...
Xml serialization - Hide null values
...due to an error when reflecting the type) until I removed the XmlAttribute from the nullable int-property.
– Matze
May 3 '13 at 11:52
2
...
How much faster is C++ than C#?
...trates is that programmers should stick with language of their choice (and from your profile it's obvious that you are career C++ programmer). In C# you can do 2D array int[,]... following up with example.
– nikib3ro
Dec 27 '17 at 17:52
...
Python Progress Bar
... a progress meter to your loops in a second:
In [1]: import time
In [2]: from tqdm import tqdm
In [3]: for i in tqdm(range(10)):
....: time.sleep(3)
60%|██████ | 6/10 [00:18<00:12, 0.33 it/s]
Also, there is a graphical version of tqdm since v2.0.0 (d977a0c):
In [1]:...
How do I move the turtle in LOGO? [closed]
...
NODRAW [ND] - Enter text mode with clear screen
NOWRAP - Prevent drawings from wrapping around screen
PENCOLOR [PC] - Change pen color
PENDOWN [PD] - Turtle leaves trail
PENUP [PU] - Turtle ceases to leave trail
RIGHT ## [RT] - Turn turtle right
SETHEADING [SETH] - Set turtle heading, e.g. SETH 180...
Using node.js as a simple web server
...w PhoneGap App. This is a generic mobile app that can load the HTML5 files from a server during development. This is a very slick trick since now you can skip the slow compile/deploy steps in your development cycle for hybrid mobile apps if you're changing JS/CSS/HTML files — which is what you're ...
How to use the PI constant in C++
...4159265358979323846 /* pi */
but check your math.h for more. An extract from the "old" math.h (in 2009):
/* Define _USE_MATH_DEFINES before including math.h to expose these macro
* definitions for common math constants. These are placed under an #ifdef
* since these commonly-defined names are...
Creating a DateTime in a specific Time Zone in c#
...eTime GmtToPacific(DateTime dateTime)
{
return TimeZoneInfo.ConvertTimeFromUtc(dateTime,
TimeZoneInfo.FindSystemTimeZoneById("Pacific Standard Time"));
}
Oddly enough, although "Pacific Standard Time" normally means something different from "Pacific Daylight Time," in this case it refe...
Rails 3.1: Engine vs. Mountable App
...ull Engine
With a full engine, the parent application inherits the routes from the engine. It is not necessary to specify anything in parent_app/config/routes.rb. Specifying the gem in Gemfile is enough for the parent app to inherit the models, routes etc. The engine routes are specified as:
#...
Converting String to Int with Swift
... is given a error. Because,In Swift 2.x, the .toInt() function was removed from String. In replacement, Int now has an initializer that accepts a String:
let a:Int? = Int(firstText.text) // firstText is UITextField
let b:Int? = Int(secondText.text) // secondText is UITextField
...