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Throw like you are releasing a paper plane and do not move your elbow. Try to release all your fingers at once. If any of the finger's release is delayed, the flight of the dart will be unstable.
The movement where you extend your arm straight after release. It is almost like you are pointing at the target you aimed for with your fingertips. How to throw Games and rules.
Top How to throw. How to throw You are copying the form from a good player, but you are not getting the target.
Where do you throw the darts from? The play area for darts is determined based on the center of the board bull. The place where you throw from It is called the throw line.
Distance Distance from directly below the board to the throw line is cm. Humboldtiana nuevoleonis. Cepaea hortensis. The following tables or charts show numerous examples of love dart morphology, on a family by family and species by species basis.
Not all families and species are included. The drawings show first the cross section, and then the lateral view, of the dart in that particular species.
Darts vary in size according to the size of the snail or slug species, but here they are all shown at the same size, for purposes of comparison.
Some species in this family have spiral darts,  and some darts have " minute barbs pointing toward the tip ".
Species of slugs within this family have spiral darts. This species was probably either Z. Some writers have commented on the parallel between the love darts of snails and the love darts fired by the Roman god Cupid , known as Eros in Greek mythology.
Malacologist mollusk expert Ronald Chase of McGill University said about the garden snail Cornu aspersum , "I believe the myth of Cupid and his arrows has its basis in this snail species, which is native to Greece".
He added, "The Greeks probably knew about this behavior because they were pretty good naturalists and observers.
In some languages, the dart that these snails use before mating is known as an "arrow". Marine gastropods in the predatory superfamily Conoidea , known as the toxoglossans , meaning "poison tongue" use a poison dart or harpoon , which is a single modified radula tooth which is created inside the mouth of the snail, and which is primarily made of chitin.
These snails are carnivorous hunters: the harpoon is used in predation. When the snail is close to its prey, it extends its proboscis a considerable distance; then it fires its harpoon and injects a toxin into the prey.
For most species of toxoglossans the prey is marine worms, but in the case of some larger cone snails , the prey is small fish. Opisthobranch gastropods are hermaphrodites, as are the pulmonates; however, opisthobranchs do not have love darts.
Nonetheless, some of them do stab one another during mating, using hardened anatomical structures. For example, in the Cephalaspidean genus Siphopteron , both seaslugs attempt to stab their partner with a two-part, spined penis.
From Wikipedia, the free encyclopedia. Darts that some snails shoot into each other during mating. Main article: Reproductive system of gastropods.
Leptaxis erubescens. Monachoides vicinus. May Hawaiian Shell News. Integrative and Comparative Biology. Behavioral Ecology and Sociobiology.
New Scientist. Retrieved 5 August McGill Tribune, 13 February American Malacological Bulletin. Behavioral Ecology. All of these can be written easily using an async function with an await for loop.
The asyncExpand and asyncMap functions are similar to expand and map , but allow their function argument to be an asynchronous function. The final three functions are more special.
There is no recovering from that. The following code shows how to use handleError to remove errors from a stream before using it in an await for loop.
A normal map requires one value for each incoming event. A StreamTransformer can work with that. For example, decoders like Utf8Decoder are transformers.
A transformer requires only one function, bind , which can be easily implemented by an async function.
The following code reads a file and runs two transforms over the stream. All lines are printed, except any that begin with a hashtag,.
The final method on Stream is listen. To create a new Stream type, you can just extend the Stream class and implement the listen method—all other methods on Stream call listen in order to work.
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Necessary Always Enabled. Migrate your packages to null safety! Dart is a client-optimized language for fast apps on any platform. Develop with a programming language specialized around the needs of user interface creation.