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What does “abstract over” mean?
... def add(a: Product, b: Product) = Product(a.value * b.value)
}
val sumOf123 = mapReduce(List(1,2,3), Sum)
val productOf456 = mapReduce(List(4,5,6), Product)
We have abstracted over monoids and foldables.
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curl json post request via terminal to a rails app
...firstname","last_name":"lastname","email":"email@email.com","password":"app123","password_confirmation":"app123"}}' \
http://localhost:3000/api/1/users
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Remove rows with all or some NAs (missing values) in data.frame
...mptions --------------------
fakeData <- function(m, n, p){
set.seed(123)
m <- matrix(runif(m*n), nrow=m, ncol=n)
m[m<p] <- NA
return(m)
}
df <- cbind( data.frame(id = paste0('ID',seq(row_size)),
stringsAsFactors = FALSE),
data.frame(fak...
How to use redis PUBLISH/SUBSCRIBE with nodejs to notify clients when data values change?
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123
OLD only use a reference
Dependencies
uses express, socket.io, node_redis and last but not l...
Can a CSV file have a comment?
... I have more often seen and used: #Csv/Version 1.9 Time,ValueA,ValueB 0.0, 123, 456 0.1, 123, 349
– Crog
Aug 25 at 8:31
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What is the difference between an expression and a statement in Python?
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123
Expression -- from the New Oxford American Dictionary:
expression: Mathematics a collecti...
How to check if a String is numeric in Java
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@kape123 :) sure "123.456" doesn´t contain digits.
– Ahmed Alejo
Nov 14 '14 at 18:01
8
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Pad a string with leading zeros so it's 3 characters long in SQL Server 2008
...technique for left-padding to any desired width:
declare @x int = 123 -- value to be padded
declare @width int = 25 -- desired width
declare @pad char(1) = '0' -- pad character
select right_justified = replicate(
@pad ,
@width-le...
Sorting a list using Lambda/Linq to objects
... answered Jan 2 '13 at 16:32
gls123gls123
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