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Reduce, fold or scan (Left/Right)?
...hrough the first argument res of our binary operator minus:
val xs = List(1, 2, 3, 4)
def minus(res: Int, x: Int) = {
println(s"op: $res - $x = ${res - x}")
res - x
}
xs.reduceLeft(minus)
// op: 1 - 2 = -1
// op: -1 - 3 = -4 // de-cumulates value -1 in *first* operator arg `res`
// op: -4 - ...
Vagrant reverse port forwarding?
...
134
When you run vagrant ssh, it's actually using this underlying command:
ssh -p 2222 -o UserKno...
Minimal web server using netcat
... minimal web server using netcat (nc). When the browser calls up localhost:1500, for instance, it should show the result of a function ( date in the example below, but eventually it'll be a python or c program that yields some data).
My little netcat web server needs to be a while true loop in bash...
What is the significance of initializing direction arrays below with given values when developing ch
...we want to add onto its x and its y value to move it to a nearby location, 1,0 is east, -1,0 is west, 0,1 is south, 0,-1 is north and so on.
(Here I have said top left is 0,0 and bottom right is 4,4 and shown what move each index of the arrays will make from the central point, X, at 2,2.)
.....
.5...
Connect to a locally built Jekyll Server using mobile devices in the LAN
...
183
Try jekyll serve --host=0.0.0.0 when you invoke Jekyll on the command line.
That will make Je...
Fastest way to replace NAs in a large data.table
...
10 Answers
10
Active
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Truncate number to two decimal places without rounding
Suppose I have a value of 15.7784514, I want to display it 15.77 with no rounding.
36 Answers
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How to split a string and assign it to variables
...
import (
"fmt"
"strings"
)
func main() {
s := strings.Split("127.0.0.1:5432", ":")
ip, port := s[0], s[1]
fmt.Println(ip, port)
}
Output:
127.0.0.1 5432
One step, for example,
package main
import (
"fmt"
"net"
)
func main() {
host, port, err := net.SplitHost...
Java synchronized static methods: lock on object or class
...
129
Since a static method has no associated object, will the synchronized keyword lock on the ...