## Someone said they would send me bitcoin, they sent me a exe file, called bitcoin.exe, and it is not running

They said they saved bitcoin in that exe file. How do I access this bitcoin? They also created other bitcoin exe files with different names. Thank you

## Someone said they would send me bitcoin, they sent me a exe file, called bitcoin.exe, and it is not running

They said they saved bitcoin in that exe file. How do I access this bitcoin? They also created other bitcoin exe files with different names. Thank you

## why it said the “The left recursion has been removed at the cost of an extra non-terminal symbol(E1) and a little extra complexity”?

When I read the book “A Practical approach to compiler construction” the chapter 4 “approaches to syntax analysis” and the section 4.2.3.3 Left Recursion, it says:

“The left recursion has been removed at the cost of an extra non-terminal symbol”

I have no idea why say that, since $$A_1$$ still contain recursion?

## Von Neumann algebra such that every state is normal- what can be said about its dimension? What about the other direction?

This is exercise 5 in page 130 of Masamichi Takesaki ‘s Theory of Operator Algebras 1 (TO SHOW THAT IT IS FINITE DIMENSIONAL, AND THAT THE IFF HOLDS).

I know that now every state is weakly continuous on the unit ball. Maybe that means that it must be separable, and then I can show that it is finite dimensional?

## Someone said they have my ip and my internal ip. They threaten to post it on the internet. What should I do? [duplicate]

They threatened me with a “I have your up and your internal up. I’m going to send it on the internet unless you do exactly as I say” what should I do? I’m doing what they say but I’m petrified.

## Why protobuf is said to be in binary format although we write it in text format similar to json

JSON

``{ "hello": "world" } ``

Protobuf

``message HelloWorld { required string name = 1; } ``

Why do we say that protobuf uses binary format during network exchange and json don’t, even though network always will transfer using binary data format?

## What are said & unsaid rules to feature app as editor’s choice on Google playstore

What are said & unsaid rules to feature app as editor’s choice on playstore

I was wondering if its possible to make a link of the form`https://twitter.com/search?q=itunes.apple%20from%3A&src=typd` where the search is performed on the whoever is logged in when it is clicked. In other words, is it possible to make the `from:` field auto populate itself using the current user’s @ username.