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Test if string is a number in Ruby on Rails
...±5.5%) i/s - 5788976 in 5.035311s
require 'benchmark/ips'
int = '220000'
bad_int = '22.to.2'
Benchmark.ips do |x|
x.report('cast') do
Integer(int) rescue false
end
x.report('cast fail') do
Integer(bad_int) rescue false
end
x.report('to_s') do
int.to_i.to_s == int
e...
Specifying and saving a figure with exact size in pixels
... |
edited May 23 '17 at 11:54
Community♦
111 silver badge
answered Dec 5 '12 at 1:04
...
What RSA key length should I use for my SSL certificates?
...datacenter, for reference a newly built AWS datacenter is hosting about 60 000 servers.
It is incredible that a single mobile device can compute some maths over a few seconds... that millions of computers couldn't dream to guess in a lifetime.
...
Is there a working C++ refactoring tool? [closed]
...factoring tool for C++ that works reliably with large code bases (some 100.000 lines)?
19 Answers
...
string sanitizer for filename
... and so on.
– Pekka
Jan 7 '10 at 17:11
15
True - but like I said: "For example".
...
Does SVG support embedding of bitmap images?
...make the SVG self-contained. An example:
<svg xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink">
...
<image
width="100" height="100"
xlink:href="data:image/png;base64,IMAGE_DATA"
/>
...
</svg>
The svg element at...
Quickest way to compare two generic lists for differences
...is the quickest (and least resource intensive) to compare two massive (>50.000 items) and as a result have two lists like the ones below:
...
Why would someone use WHERE 1=1 AND in a SQL clause?
... select * from t and checks:
the name is Bob; and
the salary is > $20,000
some people would add the first with a WHERE and subsequent ones with an AND thus:
select * from t where name = 'Bob' and salary > 20000
Lazy programmers (and that's not necessarily a bad trait) wouldn't distingui...
Given a number, find the next higher number which has the exact same set of digits as the original n
...
94
An almost-identical problem appeared as a Code Jam problem and has a solution here:
http://cod...
Add centered text to the middle of a -like line
...rator::after {
content: '';
flex: 1;
border-bottom: 1px solid #000;
}
.separator::before {
margin-right: .25em;
}
.separator::after {
margin-left: .25em;
}
See http://jsfiddle.net/MatTheCat/Laut6zyc/ for demo.
Today the compatibility is not that bad (you can add all of old fle...