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RuntimeWarning: invalid value encountered in divide
...is trying to "divide by zero" or "divide by NaN". If you are aware of that and don't want it to bother you, then you can try:
import numpy as np
np.seterr(divide='ignore', invalid='ignore')
For more details see:
http://docs.scipy.org/doc/numpy/reference/generated/numpy.seterr.html
...
To draw an Underline below the TextView in Android
...
Love the 3rd approach. Short, simple and concise and adds just one extra line of code to my program.
– Matt
Feb 15 '13 at 15:20
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switch() statement usage
...ue again. It seems switch is generally faster than if statements.
So that, and the fact that the code is shorter/neater with a switch statement leans in favor of switch:
# Simplified to only measure the overhead of switch vs if
test1 <- function(type) {
switch(type,
mean = 1,
m...
When tracing out variables in the console, How to create a new line?
...ead of single quote ' or double quote marks ". They also preserve new line and tab
const roleName = 'test1';
const role_ID = 'test2';
const modal_ID = 'test3';
const related = 'test4';
console.log(`
roleName = ${roleName}
role_ID = ${role_ID}
modal_ID = ${modal_ID}
rel...
C# Java HashMap equivalent
...ou should be aware of:
Adding/Getting items
Java's HashMap has the put and get methods for setting/getting items
myMap.put(key, value)
MyObject value = myMap.get(key)
C#'s Dictionary uses [] indexing for setting/getting items
myDictionary[key] = value
MyObject value = myDictionary[key]
nu...
How do you plot bar charts in gnuplot?
...ata.dat' every 2::1 using 1:2 with boxes ls 2
If you want to be tricky and use some neat gnuplot tricks:
Gnuplot has psuedo-columns that can be used as the index to color:
plot 'data.dat' using 1:2:0 with boxes lc variable
Further you can use a function to pick the colors you want:
mycolo...
Does a finally block run even if you throw a new Exception?
In this code will someVar be set even if the catch block is executed and the second Exception is thrown?
6 Answers
...
Enabling markdown highlighting in Vim
I'm using Vim in a terminal on my MacBook Air with OS X Lion, and I can't seem to find a good plugin for Markdown syntax highlighting.
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How to get Spinner value?
In Android, I am trying to get the selected Spinner value with a listener.
7 Answers
7...
How to programmatically close a JFrame
...tem.exit(...) will do exactly what you want in a very abrupt, brute-force, and possibly problematic fashion.
If by Alt-F4 or X you mean hide the window, then frame.setVisible(false) is how you "close" the window. The window will continue to consume resources/memory but can be made visible again ver...