View semver.go
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package main | |
import ( | |
"flag" | |
"fmt" | |
"github.com/Masterminds/semver/v3" | |
) | |
var vFlag = flag.String("version", "0.1", "version to check") |
View indices.go
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// Given an array of integers that is already sorted in ascending | |
// order find two numbers such that they add up to a specific target number. | |
// | |
// The function twoSum should return indices of the two numbers such that | |
// they add up to the target where index1 must be less than index2. | |
package main | |
import ( | |
"errors" | |
"fmt" |
View generics.go2
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// Go 2 Playground: https://go2goplay.golang.org/ | |
// | |
// Or to install the go2go tool: | |
// git clone https://go.googlesource.com/go goroot | |
// cd ./goroot | |
// git checkout dev.go2go | |
// cd ./src | |
// CGO_ENABLED=0 ./all.bash | |
// export PATH=/path/to/your/goroot/bin:$PATH | |
// |
View main.go
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package main | |
import "fmt" | |
type node struct { | |
v int | |
l *node | |
r *node | |
} |
View done_channel.go
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package main | |
import ( | |
"fmt" | |
"time" | |
) | |
// multiples uses a done channel to shut down | |
func multiples(i int) (chan int, chan struct{}) { | |
out := make(chan int) |
View errors.go
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package main | |
import "fmt" | |
type Error struct { | |
Message string | |
} | |
func (e *Error) Error() string { | |
return "an error occured" |
View main.go
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// Converts the data created by Fitbit export from the output JSON | |
// to comma-separated values. | |
// go run main.go > weight.csv | |
package main | |
import ( | |
"encoding/json" | |
"fmt" | |
"io/ioutil" | |
"os" |
View main.go
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// Do not use package math/rand to generate keys, even throwaway ones. | |
// Unseeded, the generator is completely predictable. Seeded with | |
// time.Nanoseconds(), there are just a few bits of entropy. Instead, | |
// use crypto/rand's Reader, and if you need text, print to hexadecimal | |
// or base64. | |
package main | |
import ( | |
"crypto/rand" | |
"fmt" |
View query.go
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package main | |
import ( | |
"fmt" | |
"math/rand" | |
"strings" | |
"time" | |
) | |
// multiQuery uses a buffered channel, otherwise the two slower goroutines |
View pipeline.go
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package main | |
import "fmt" | |
// first adds 20 integers in sequence to a channel then closes | |
// it, signalling all of the writing is done. | |
func first(out chan<- int) { | |
for x := 0; x < 20; x++ { | |
out <- x | |
} |
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