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Haskell: Where vs. Let
... has a different emphasis and you see both used in math papers, textbooks, etc. Generally, variables that are sufficiently unintuitive that the formula doesn't make sense without them should be defined above; variables that are intuitive due to context or their names should be defined below. For exa...
TCP vs UDP on video stream
...er used in satellite video broadcast that carry several audio, video, EPG, etc. streams. This is necessary as satellite link is not duplex communication, meaning receiver can't request re-transmission of lost packets.
When you have duplex communication available it is always better to re-transmit ...
How do I decode HTML entities in Swift?
...t 4
String extension computed variable
Without extra guard, do, catch, etc...
Returns the original strings if decoding fails
extension String {
var htmlDecoded: String {
let decoded = try? NSAttributedString(data: Data(utf8), options: [
.documentType: NSAttributedStri...
How to override to_json in Rails?
...t::json.encode. This happens for all types: object, numeric, date, string, etc (see the ActiveSupport code).
ActiveRecord objects behave the same way. There is a default as_json implementation that creates a hash that includes all the model's attributes. You should override as_json in your Model to...
Types in Objective-C on iOS
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There's also SInt32, UInt32, etc. (used a lot in Core Audio).
– Nicolas Miari
Apr 14 '14 at 11:02
add a comment
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What is the difference between save and export in Docker?
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The short answer is:
save will fetch an image : for a VM or a physical server, that would be the installation .ISO image or disk. The base operating system.
It will pack the layers and metadata of all the chain required to build the image. You can then loa...
Securely storing environment variables in GAE with app.yaml
...ient_secrets_live.json, client_secrets_dev.json, client_secrets_pilot.json etc, then use python logic to determine which server you are on and load up the appropriate json file. The app_identity.get_application_id() method may be useful to auto detect which server you are on. Is this the kind of thi...
How to initialize a JavaScript Date to a particular time zone
...* 1000;
// Use the timestamp and offset as necessary to calculate min/sec etc, i.e. for countdowns.
var timestamp = mydate.getTime() + offset,
seconds = Math.floor(timestamp / 1000) % 60,
minutes = Math.floor(timestamp / 1000 / 60) % 60,
hours = Math.floor(timestamp / 1000 / 60 / 60);...
Parsing IPv6 extension headers containing unknown extensions
...arse IPv6 headers to match things like ICMPv6 types, TCP/UDP port numbers, etc.
4 Answers
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Open Graph namespace declaration: HTML with XMLNS or head prefix?
...ing something new if support is not all there (among user agents, parsers, etc.) seems like an unnecessary risk unless there is some actual difference between the two. I haven't been able to find any resource that says so.
– AndrewF
Apr 28 '12 at 3:24
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