diff options
| -rw-r--r-- | go.html.markdown | 8 | ||||
| -rw-r--r-- | lua.html.markdown | 15 | ||||
| -rw-r--r-- | objective-c.html.markdown | 10 |
3 files changed, 20 insertions, 13 deletions
diff --git a/go.html.markdown b/go.html.markdown index 4db76a49..456f0c19 100644 --- a/go.html.markdown +++ b/go.html.markdown @@ -1,4 +1,4 @@ ---- +--- name: Go category: language language: Go @@ -71,7 +71,7 @@ func learnTypes() { can include line breaks.` // same string type // non-ASCII literal. Go source is UTF-8. - g := 'Σ' // rune type, an alias for uint32, holds a UTF-8 code point + g := 'Σ' // rune type, an alias for uint32, holds a unicode code point f := 3.14195 // float64, an IEEE-754 64-bit floating point number c := 3 + 4i // complex128, represented internally with two float64s @@ -251,7 +251,7 @@ func learnConcurrency() { fmt.Println(<-c, <-c, <-c) // channel on right, <- is "receive" operator. cs := make(chan string) // another channel, this one handles strings. - cc := make(chan chan string) // a channel of channels. + cc := make(chan chan string) // a channel of string channels. go func() { c <- 84 }() // start a new goroutine just to send a value go func() { cs <- "wordy" }() // again, for cs this time // Select has syntax like a switch statement but each case involves @@ -259,7 +259,7 @@ func learnConcurrency() { // that are ready to communicate. select { case i := <-c: // the value received can be assigned to a variable - fmt.Println("it's a", i) + fmt.Printf("it's a %T", i) case <-cs: // or the value received can be discarded fmt.Println("it's a string") case <-cc: // empty channel, not ready for communication. diff --git a/lua.html.markdown b/lua.html.markdown index 7325a1cf..369de908 100644 --- a/lua.html.markdown +++ b/lua.html.markdown @@ -125,6 +125,9 @@ f = function (x) return x * x end -- And so are these: local function g(x) return math.sin(x) end +local g = function(x) return math.xin(x) end +-- Equivalent to local function g(x)..., except referring +-- to g in the function body won't work as expected. local g; g = function (x) return math.sin(x) end -- the 'local g' decl makes g-self-references ok. @@ -133,6 +136,10 @@ local g; g = function (x) return math.sin(x) end -- Calls with one string param don't need parens: print 'hello' -- Works fine. +-- Calls with one table param don't need parens +-- either (more on tables below): +print {} -- Works fine too. + ---------------------------------------------------- -- 3. Tables. @@ -203,7 +210,7 @@ f2 = {a = 2, b = 3} metafraction = {} function metafraction.__add(f1, f2) - sum = {} + local sum = {} sum.b = f1.b * f2.b sum.a = f1.a * f2.b + f2.a * f1.b return sum @@ -266,7 +273,7 @@ eatenBy = myFavs.animal -- works! thanks, metatable Dog = {} -- 1. function Dog:new() -- 2. - newObj = {sound = 'woof'} -- 3. + local newObj = {sound = 'woof'} -- 3. self.__index = self -- 4. return setmetatable(newObj, self) -- 5. end @@ -301,7 +308,7 @@ mrDog:makeSound() -- 'I say woof' -- 8. LoudDog = Dog:new() -- 1. function LoudDog:makeSound() - s = self.sound .. ' ' -- 2. + local s = self.sound .. ' ' -- 2. print(s .. s .. s) end @@ -322,7 +329,7 @@ seymour:makeSound() -- 'woof woof woof' -- 4. -- If needed, a subclass's new() is like the base's: function LoudDog:new() - newObj = {} + local newObj = {} -- set up newObj self.__index = self return setmetatable(newObj, self) diff --git a/objective-c.html.markdown b/objective-c.html.markdown index 9e9f43e7..926a4a0d 100644 --- a/objective-c.html.markdown +++ b/objective-c.html.markdown @@ -160,7 +160,7 @@ int main (int argc, const char * argv[]) int jj; for (jj=0; jj < 4; jj++) { - NSLog(@"%d,", jj++); + NSLog(@"%d,", jj); } // => prints "0," // "1," // "2," @@ -223,7 +223,7 @@ int main (int argc, const char * argv[]) // } // -/+ (type) Method declarations; // @end -@interface MyClass : NSObject <MyCustomProtocol> +@interface MyClass : NSObject <MyProtocol> { int count; id data; @@ -241,14 +241,14 @@ int main (int argc, const char * argv[]) + (NSString *)classMethod; // - for instance method -- (NSString *)instanceMethodWithParmeter:(NSString *)string; +- (NSString *)instanceMethodWithParameter:(NSString *)string; - (NSNumber *)methodAParameterAsString:(NSString*)string andAParameterAsNumber:(NSNumber *)number; @end // Implement the methods in an implementation (MyClass.m) file: -@implementation UserObject +@implementation MyClass // Call when the object is releasing - (void)dealloc @@ -271,7 +271,7 @@ int main (int argc, const char * argv[]) return [[self alloc] init]; } -- (NSString *)instanceMethodWithParmeter:(NSString *)string +- (NSString *)instanceMethodWithParameter:(NSString *)string { return @"New string"; } |