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fix peek syntax #48

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fix peek syntax #48

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08c7fbd
Update peek.rho
jimscarver Jul 29, 2019
fc86dde
update peek syntax
jimscarver Jul 29, 2019
2a58d4e
Merge pull request #1 from jimscarver/patch-2
jimscarver Jul 29, 2019
5023ea0
Merge pull request #2 from jimscarver/patch-1
jimscarver Jul 29, 2019
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4 changes: 2 additions & 2 deletions 04-PersistentSendAndPeek/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -55,13 +55,13 @@ One problem with the code above is that a forgetful pilot may not actually put t

![Peeking at a message allows you to read it without consuming it.](letterPeek.png)

Rholang will have a special syntax for this sort of thing eventually. It isn't available right now, but I'll show you the syntax just so you're ready. To "peek" at what's on a channel without consuming it, use the `<!` operator.
To "peek" at what's on a channel without consuming it, use the `<<-` operator.

[peek.rho](peek.rho)


Which syntax is used to peek at a message?
- [x] `for (x <! y){...}`
- [x] `for (x <<- y){...}`
- [ ] `for (x <= y){...}`
- [ ] `x!!(y)`

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3 changes: 1 addition & 2 deletions 04-PersistentSendAndPeek/peek.rho
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@@ -1,12 +1,11 @@
// REMINDER: Peek is not yet implemented

new airportInfo, stdout(`rho:io:stdout`) in {
// ATC sends the info
airportInfo!("No wind; Runway 11")
|

// Pilot receives the info
for (info <! airportInfo) {
for (info <<- airportInfo) {
stdout!(*info)
}
|
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