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ERROR:'keytool' is not recognized as an internal or external command, operable program or batch file
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How to delete a folder with files using Java
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25 Answers
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How to change language settings in R
...l set it to French and then back again:
> Sys.setenv(LANG = "fr")
> 2 + x
Erreur : objet 'x' introuvable
> Sys.setenv(LANG = "en")
> 2 + x
Error: object 'x' not found
A list of the abbreviations can be found here.
Sys.getenv() gives you a list of all the environment variables that ar...
What does the (unary) * operator do in this Ruby code?
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271
The * is the splat operator.
It expands an Array into a list of arguments, in this case a lis...
Lists in ConfigParser
...is way your config section would look like:
[Section 3]
barList=item1,item2
It's not pretty but it's functional for most simple lists.
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MySQL Conditional Insert
...sert, try:
INSERT INTO x_table(instance, user, item)
SELECT 919191, 123, 456
FROM dual
WHERE NOT EXISTS (SELECT * FROM x_table
WHERE user = 123
AND item = 456)
In this, dual is a table with one row only (found origi...
How do I convert a numpy array to (and display) an image?
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240
You could use PIL to create (and display) an image:
from PIL import Image
import numpy as np
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Efficient way to insert a number into a sorted array of numbers?
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edited Sep 14 '12 at 9:45
Sicco
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