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How do I create an empty array/matrix in NumPy?
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13 Answers
13
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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 - ...
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.)
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.5...
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...
Vagrant reverse port forwarding?
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134
When you run vagrant ssh, it's actually using this underlying command:
ssh -p 2222 -o UserKno...
How to split a string and assign it to variables
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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...
Fastest way to replace NAs in a large data.table
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10 Answers
10
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Connect to a locally built Jekyll Server using mobile devices in the LAN
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183
Try jekyll serve --host=0.0.0.0 when you invoke Jekyll on the command line.
That will make Je...