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Run a callback only if an attribute has changed in Rails
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200
Rails 5.1+
class Page < ActiveRecord::Base
before_save :do_something, if: :will_save_chan...
Convert Time from one time zone to another in Rails
...pment environment (Rails 2.3.2)
>> now = DateTime.now.utc
=> Sun, 06 Sep 2009 22:27:45 +0000
>> now.in_time_zone('Eastern Time (US & Canada)')
=> Sun, 06 Sep 2009 18:27:45 EDT -04:00
>> quit
So for your particular example
Annotation.last.created_at.in_time_zone('Easter...
Get the first key name of a javascript object [duplicate]
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In Javascript you can do the following:
Object.keys(ahash)[0];
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Storyboard - refer to ViewController in AppDelegate
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answered Nov 18 '11 at 17:50
Robin SummerhillRobin Summerhill
13.7k33 gold badges3838 silver badges3737 bronze badges
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Do login forms need tokens against CSRF attacks?
...ther.
– A. Wilson
Jan 23 '14 at 18:30
2
"Is there anything preventing the attacker from asking fo...
Storing DateTime (UTC) vs. storing DateTimeOffset
...but datetimeoffset stores LOCAL time + Offset, or UTC time + offset equal +0.
– Serhii Kyslyi
Nov 7 '13 at 12:59
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How to write a caption under an image?
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}
a, figure {
display: inline-block;
}
figcaption {
margin: 10px 0 0 0;
font-variant: small-caps;
font-family: Arial;
font-weight: bold;
color: #bb3333;
}
figure {
padding: 5px;
}
img:hover {
transform: scale(1.1);
-ms-transform: scale(1.1);
...
Correct way to populate an Array with a Range in Ruby
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You can create an array with a range using splat,
>> a=*(1..10)
=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
using Kernel Array method,
Array (1..10)
=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
or using to_a
(1..10).to_a
=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
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POST request send json data java HttpUrlConnection
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rogerdpack
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answered Jan 28 '14 at 11:59
hgoeblhgoebl
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Google Analytics - Failed to load resource: http://www.google-analytics.com/ga.js
...)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
ga('create', 'UA-XXXXX-XX', 'auto');
ga('send', 'pageview');
</script>
...