Polkadot block-chain basic concepts - substrate

I am new to block chain,how to understand polka dot block chain ...,please anyone explain me with some example in real time.....
what is substrate
what is dot,why do we use it
how to relate to any use case...
I have tried git clone https://github.com/substrate-developer-hub/substrate-node-template to set up a node.
Please help me in understanding the same.
Thank you..

Related

Disable IRI api-platform

I'm trying to create a fat record in api-platform, normally, it will have to put IRI, but I don't want to (I can't.).
My question, is it possible to do something like that?
Instead of that:
Do it like this:
Thank you in advance for your future help.Thank you in advance for your future help,
You can use the allow_plain_identifiers but this is highly discouraged. See this comment for the rationale: https://github.com/api-platform/core/pull/2022#issuecomment-398851861

2D distributions in the HistFactory?

How can I specify in the construction of the HistFactory the signal and background to be 2-dimensional distributions?
I have understood than in RooStats you need to change the TH1 to a TH2.
At the moment to write my model in the json file can I use a ndarray to do something similar?.
Which is the correct way to do this?
I hope someone can help me and thank you in advance.
Currently the best way is to unroll the distributions e.g.
{'data': 2darray.ravel().tolist()}
Since mathematically it doesn't make any difference.
If you want to convert from XML+ROOT this is not yet supported (but could be). If so, please open an issue on GitHub.
Thanks for using pyhf!

Internationalization-packages for Scene-Builder?

I saw the possibility to change the Internationalization of Scene Builder. But I did not find somewhere suitable language packages. May somebody of you have been faced by same kind of intention? For any hints in this matter I would be grateful.
With best regards
Peter
I checked by the way the possibility to change the language of the scene-builder-menu with use of google. The result of my investigation is: It is not possible to be done by a standard kind of user. Sorry, I did not expect this result. Anyway, I learned by. Thank you very much for the time an efforts you spend to bring me onto the right way to get an answer in regard to the question i did publish in before. Thank you.

How do I add letters prefix before my order number?

all Im trying to add a few letters before the order number in magento, currently they are at default 100000001, 100000002, etc but I'm wanting something like,TD10000001, TD10000002, I've checked out several tutorials that say I need to edit the: Mage_Eav_Model_Entity_Increment_Numeric function but there doesn't seem to be a decent tutorial telling me how to do this.
Any help would be appreciated.
Answered, found an awesome free plugin by MSWebDesign that allows prefixes before the order number exactly what I wanted, hope this helps anyone else.

How to make a power point presentation like this

maybe this is not the correct forum where to post this question, but i've serched for two weeks in the web, without results.
I need to make a kind of power point presentation, something like this - do know which program can i use?
Thank you
I think, that tool used for this prezentation can be find on
http://prezi.com/
This is called infographics and you can use website like visual.ly/
Then, you have to do your own effects

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