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使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...implement multitouch: Rotation Detector
Xinyue Deng dengxinyue0420@gmail.com
DRAFT (March 6, 2016): Building extensions requires the App Inventor extensions capability, which is not yet incorporated into the App Inventor release. But you can try some ofary AI2 server.
You can implement the Rot...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...implement multitouch: Rotation Detector
Xinyue Deng dengxinyue0420@gmail.com
DRAFT (March 6, 2016): Building extensions requires the App Inventor extensions capability, which is not yet incorporated into the App Inventor release. But you can try some ofary AI2 server.
You can implement the Rot...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...implement multitouch: Rotation Detector
Xinyue Deng dengxinyue0420@gmail.com
DRAFT (March 6, 2016): Building extensions requires the App Inventor extensions capability, which is not yet incorporated into the App Inventor release. But you can try some ofary AI2 server.
You can implement the Rot...
Boolean operators && and ||
...f.
The functions all and any are often used on the result of a vectorized comparison to see if all or any of the comparisons are true, respectively. The results from these functions are sure to be length 1 so they are appropriate for use in if clauses, while the results from the vectorized comparis...
Difference between Pragma and Cache-Control headers?
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Although the answer of cnst below is much more complicated, it is also much more correct according to the specification. Pragma: no-cache is intended to be used only in requests (meaning "I want the original, not a cached copy") and its behaviour is not specified for resp...
Add a tooltip to a div
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For a fancier javascript version, you can look into:
https://jqueryhouse.com/best-jquery-tooltip-plugins/
The above link gives you 25 options for tooltips.
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Input with display:block is not a block, why not?
...olyfill to handle more edge cases and work with IE8 over at github: github.com/Schepp/box-sizing-polyfill
– nicjohnson
Feb 10 '12 at 0:21
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Validating IPv4 addresses with regexp
...oid unwanted sub-matches. NB: This still doesn't take into account @dty's comment as I'm not familiar with that form of IP; though he's correct that it seems valid.
– JohnLBevan
Oct 16 '16 at 18:42
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Send POST data using XMLHttpRequest
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No, but @Vadorequest's comment mentioned jQuery - he asked if it were possible to pass data "like jQuery". I mentioned how I think jQuery does it and thus, how you could achieve this.
– Dan Pantry
Apr 16 '15 a...
Why XML-Serializable class need a parameterless constructor
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Yes I do it often, though I've come to accept that public parameterless constructors are great because they allow you to use "new()" with generics and the new initialization syntax. For parametered constructors use static factory methods or the builder pa...