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How to check if object has any properties in JavaScript?
...ave any way to create non-enumerable properties.
However this has changed now with ECMAScript 5th Edition, and we are able to create non-enumerable, non-writable or non-deletable properties, so the above method can fail, e.g.:
var obj = {};
Object.defineProperty(obj, 'test', { value: 'testVal',
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How to link to a named anchor in Multimarkdown?
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@jj1bdx I do now -- the <a id="id"></a> form is best. See this SO question/answer.
– Steve Powell
May 28 '12 at 16:12
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Is there a performance gain in using single quotes vs double quotes in ruby?
Do you know if using double quotes instead of single quotes in ruby decreases performance in any meaningful way in ruby 1.8 and 1.9.
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How to get the number of days of difference between two dates on mysql?
...-14 11:00:00');
returns 1
select timestampdiff(DAY, '2016-04-13 11:00:00', now()); returns how many full 24h days has passed since 2016-04-13 11:00:00 until now.
Hope it will help someone, because at first it isn't much obvious why datediff returns values which seems to be unexpected or wrong.
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Force HTML5 youtube video
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hmm - now it's not working (same vids), weird. I wonder if it only works on certain youtube servers?
– UpTheCreek
Mar 3 '12 at 13:02
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CSS \9 in width property
...ls wide.
More info
EDIT:
This answer was written in 2011. It should now be noted that this hack also works in IE 10.
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is there an virtual environment for node.js?
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Tested and confirmed now. npm install replaced npm bundle as of NPM 1.0, I believe.
– Marnen Laibow-Koser
Feb 11 '12 at 19:01
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create multiple tag docker image
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Since 1.10 release, you can now add multiple tags at once on build:
docker build -t name1:tag1 -t name1:tag2 -t name2 .
Source: Add ability to add multiple tags with docker build
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How to profile methods in Scala?
...noTime()
println("Elapsed time: " + (t1 - t0) + "ns")
result
}
// Now wrap your method calls, for example change this...
val result = 1 to 1000 sum
// ... into this
val result = time { 1 to 1000 sum }
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Removing carriage return and new-line from the end of a string in c#
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I've been writing c# since v1.0 came out (10 years ago). Now you tell me about TrimEnd. Doh!
– s15199d
Dec 28 '12 at 20:05
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