First, here's what can happen when text/template is used for HTML. Note Harry's FirstName property).
package main
import (
"fmt"
"html/template"
"os"
)
type Person struct {
FirstName string
LastName string
Street string
Cit...
Using regular recursion, each recursive call pushes another entry onto the call stack. When the recursion is completed, the application has to pop each entry off all the way back down. If there are much recursive function calls it can end up with a huge stack.
Scala automatically removes the recurs...
Methods in Go are just like functions, except they have receiver.
Usually receiver is some kind of struct or type.
package main
import (
"fmt"
)
type Employee struct {
Name string
Age int
Rank int
}
func (empl *Employee) Promote() {
empl.Rank++
}
...
With methods in golang you can do method "chaining" passing pointer to method and returning pointer to the same struct like this:
package main
import (
"fmt"
)
type Employee struct {
Name string
Age int
Rank int
}
func (empl *Employee) Promote() *...
It is possible to specify log destination with something that statisfies io.Writer interface. With that we can log to file:
package main
import (
"log"
"os"
)
func main() {
logfile, err := os.OpenFile("test.log", os.O_RDWR|os.O_CREATE|os.O_APPEND,...
It is also possible to log to syslog with log/syslog like this:
package main
import (
"log"
"log/syslog"
)
func main() {
syslogger, err := syslog.New(syslog.LOG_INFO, "syslog_example")
if err != nil {
log.Fatalln(err)
}
l...
context.lineCap=capStyle // butt (default), round, square
Sets the cap style of line starting points and ending points.
butt, the default lineCap style, shows squared caps that do not extend beyond the line's starting and ending points.
round, shows rounded caps that extend beyond the ...
context.lineJoin=joinStyle // miter (default), round, bevel
Sets the style used to connect adjoining line segments.
miter, the default, joins line segments with a sharp joint.
round, joins line segments with a rounded joint.
bevel, joins line segments with a blunted joint.
<!doctype...
context.strokeStyle=color
Sets the color that will be used to stroke the outline of the current path.
These are color options (these must be quoted):
A CSS named color, for example context.strokeStyle='red'
A hex color, for example context.strokeStyle='#FF0000'
An RGB color, for e...
context.fillStyle=color
Sets the color that will be used to fill the interior of the current path.
These are color options (these must be quoted):
A CSS named color, for example context.fillStyle='red'
A hex color, for example context.fillStyle='#FF0000'
An RGB color, for example ...
context.lineWidth=lineWidth
Sets the width of the line that will stroke the outline of the path
<!doctype html>
<html>
<head>
<style>
body{ background-color:white; }
#canvas{border:1px solid red; }
</style>
<script>
window.onload=(function(){...
shadowColor = color // CSS color
shadowBlur = width // integer blur width
shadowOffsetX = distance // shadow is moved horizontally by this offset
shadowOffsetY = distance // shadow is moved vertically by this offset
This set of attributes will add a shadow around a path.
Bo...
var gradient = createLinearGradient( startX, startY, endX, endY )
gradient.addColorStop(gradientPercentPosition, CssColor)
gradient.addColorStop(gradientPercentPosition, CssColor)
[optionally add more color stops to add to the variety of the gradient]
Creates a reusable linear gradient (object...
var gradient = createRadialGradient(
centerX1, centerY1, radius1, // this is the "display' circle
centerX2, centerY2, radius2 // this is the "light casting" circle
)
gradient.addColorStop(gradientPercentPosition, CssColor)
gradient.addColorStop(gradientPerce...
for /L %%A in (1,2,40) do echo %%A
This line will iterate from 1 to 39, increasing by 2 each time.
The first parameter, 1, is the starting number.
The second parameter, 2, is the increment.
The third parameter, 40, is the maximum.
Use itertools.chain to create a single generator which will yield the values from several generators in sequence.
from itertools import chain
a = (x for x in ['1', '2', '3', '4'])
b = (x for x in ['x', 'y', 'z'])
' '.join(chain(a, b))
Results in:
'1 2 3 4 x y z'
As an alternate constructo...
import std.stdio;
T min(T)(in T arg1, in T arg2) {
return arg1 < arg2 ? arg1 : arg2;
}
void main() {
//Automatic type inference
writeln(min(1, 2));
//Explicit type
writeln(min!(ubyte)(1, 2));
//With single type, the parenthesis might be ommited
...
You can check for syntax errors and referenced files in an NGINX configuration file before running it with:
nginx -t
Alternatively you can run service script
service nginx configtest
While both of these commands will tell you if your new nginx configuration is ok [without killing your curren...
