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javascript - Please help, what is the programming language with <-?

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Release: 2016-08-29 08:50:53
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What programming language is this below? It looks like js, but I have never seen it in js<-

<code>GetSinaURL <- function(code = '600000', year = '2016', quarter = '1', index = FALSE) {
  sina.url <- ''
  if (index) {
    sina.url <- paste0('http://vip.stock.finance.sina.com.cn/corp/go.php/vMS_MarketHistory/stockid/', code, '/type/S.phtml?year=', year, '&jidu=', quarter)
  } else {
    sina.url <- paste0('http://vip.stock.finance.sina.com.cn/corp/go.php/vMS_FuQuanMarketHistory/stockid/', code, '.phtml?year=', year, '&jidu=', quarter)
  }
  return(sina.url)
}</code>
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What programming language is this below? It looks like js, but I have never seen it in js<-

<code>GetSinaURL <- function(code = '600000', year = '2016', quarter = '1', index = FALSE) {
  sina.url <- ''
  if (index) {
    sina.url <- paste0('http://vip.stock.finance.sina.com.cn/corp/go.php/vMS_MarketHistory/stockid/', code, '/type/S.phtml?year=', year, '&jidu=', quarter)
  } else {
    sina.url <- paste0('http://vip.stock.finance.sina.com.cn/corp/go.php/vMS_FuQuanMarketHistory/stockid/', code, '.phtml?year=', year, '&jidu=', quarter)
  }
  return(sina.url)
}</code>
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Googled it and found the original text.
R grabbed the historical price of A shares and wrote it into MySQL

Is it R voice?

F# uses <- as the assignment operation, and I don’t know the rest.

Golang has this symbol, but there is no such thing as function

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