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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?
...
240
You could use PIL to create (and display) an image:
from PIL import Image
import numpy as np
...
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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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...
What's the maximum value for an int in PHP?
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124
From the PHP manual:
The size of an integer is
platform-dependent, although a maximum
value of...
Efficient way to insert a number into a sorted array of numbers?
... |
edited Sep 14 '12 at 9:45
Sicco
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answer...
Ignore outliers in ggplot2 boxplot
How would I ignore outliers in ggplot2 boxplot? I don't simply want them to disappear (i.e. outlier.size=0), but I want them to be ignored such that the y axis scales to show 1st/3rd percentile. My outliers are causing the "box" to shrink so small its practically a line. Are there some techniques...
Speed up the loop operation in R
...possible. I took your function, change indexing and here version_A
dayloop2_A <- function(temp){
res <- numeric(nrow(temp))
for (i in 1:nrow(temp)){
res[i] <- i
if (i > 1) {
if ((temp[i,6] == temp[i-1,6]) & (temp[i,3] == temp[i-1,...
Why does a base64 encoded string have an = sign at the end
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282
It serves as padding.
A more complete answer is that a base64 encoded string doesn't always e...