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Cleaning `Inf` values from an R dataframe
..., function(x) replace(x, is.infinite(x),NA))))
## user system elapsed
# 0.52 0.01 0.53
# is.na (@dwin)
system.time(is.na(dat) <- sapply(dat, is.infinite))
# user system elapsed
# 32.96 0.07 33.12
# modified is.na
system.time(is.na(dat) <- do.call(cbind,lapply(dat, is.infini...
Which SQL query is faster? Filter on Join criteria or Where clause?
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answered Mar 24 '10 at 17:40
QuassnoiQuassnoi
369k8181 gold badges571571 silver badges582582 bronze badges
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Is floating point math broken?
...s format as a whole number times a power of two; rational numbers (such as 0.1, which is 1/10) whose denominator is not a power of two cannot be exactly represented.
For 0.1 in the standard binary64 format, the representation can be written exactly as
0.1000000000000000055511151231257827021181583...
Where can I get a list of Ansible pre-defined variables?
...aybooks and template files. For example, the host ip address is ansible_eth0.ipv4.address. Googleing and searching the docs I cound't find a list of all available variables. Would someone list them for me?
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How to put individual tags for a scatter plot
...se plt.annotate:
import numpy as np
import matplotlib.pyplot as plt
N = 10
data = np.random.random((N, 4))
labels = ['point{0}'.format(i) for i in range(N)]
plt.subplots_adjust(bottom = 0.1)
plt.scatter(
data[:, 0], data[:, 1], marker='o', c=data[:, 2], s=data[:, 3] * 1500,
cmap=plt.get_c...
Ruby, remove last N characters from a string?
..._suffix!('123') # => "abc"
It's even significantly faster (almost 40% with the bang method) than the top answer. Here's the result of the same benchmark:
user system total real
chomp 0.949823 0.001025 0.950848 ( 0.951941)
range ...
Node.js + Nginx - What now?
...ng like:
# the IP(s) on which your node server is running. I chose port 3000.
upstream app_yourdomain {
server 127.0.0.1:3000;
keepalive 8;
}
# the nginx server instance
server {
listen 80;
listen [::]:80;
server_name yourdomain.com www.yourdomain.com;
access_log /var/log/...
Equivalent of String.format in jQuery
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20 Answers
20
Active
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Getting current date and time in JavaScript
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600
.getMonth() returns a zero-based number so to get the correct month you need to add 1, so calli...
How to make button look like a link?
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button {
background: none!important;
border: none;
padding: 0!important;
/*optional*/
font-family: arial, sans-serif;
/*input has OS specific font-family*/
color: #069;
text-decoration: underline;
cursor: pointer;
}
<button> your button that looks like a link...