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authorLuis Custodio <luis.custodio@gmail.com>2015-10-17 13:11:25 +0200
committerLuis Custodio <luis.custodio@gmail.com>2015-10-17 13:11:25 +0200
commitf5873b08901bfaec3fb46518258ff9e886fd04c4 (patch)
tree62886b71c7226f0c6c4f979d61ff96c839a641a9 /smalltalk.html.markdown
parentc9348e5a82b639093f8f3eee955ffdf6fb99b5d8 (diff)
parent0e6d9f6fe9aeffc64c3adad3e4a0ee1cc0d1dd88 (diff)
Merge branch 'master' of github.com:adambard/learnxinyminutes-docs
Diffstat (limited to 'smalltalk.html.markdown')
-rw-r--r--smalltalk.html.markdown90
1 files changed, 45 insertions, 45 deletions
diff --git a/smalltalk.html.markdown b/smalltalk.html.markdown
index a434a1ad..3b388505 100644
--- a/smalltalk.html.markdown
+++ b/smalltalk.html.markdown
@@ -11,28 +11,28 @@ contributors:
Feedback highly appreciated! Reach me at [@jigyasa_grover](https://twitter.com/jigyasa_grover) or send me an e-mail at `grover.jigyasa1@gmail.com`.
-##Allowable characters:
-- a-z
-- A-Z
-- 0-9
+##Allowable characters:
+- a-z
+- A-Z
+- 0-9
- .+/\*~<>@%|&?
- blank, tab, cr, ff, lf
##Variables:
-- variables must be declared before use
-- shared vars must begin with uppercase
-- local vars must begin with lowercase
+- variables must be declared before use
+- shared vars must begin with uppercase
+- local vars must begin with lowercase
- reserved names: `nil`, `true`, `false`, `self`, `super`, and `Smalltalk`
-##Variable scope:
-- Global: defined in Dictionary Smalltalk and accessible by all objects in system - Special: (reserved) `Smalltalk`, `super`, `self`, `true`, `false`, & `nil`
-- Method Temporary: local to a method
-- Block Temporary: local to a block
-- Pool: variables in a Dictionary object
+##Variable scope:
+- Global: defined in Dictionary Smalltalk and accessible by all objects in system - Special: (reserved) `Smalltalk`, `super`, `self`, `true`, `false`, & `nil`
+- Method Temporary: local to a method
+- Block Temporary: local to a block
+- Pool: variables in a Dictionary object
- Method Parameters: automatic local vars created as a result of message call with params
- Block Parameters: automatic local vars created as a result of value: message call
-- Class: shared with all instances of one class & its subclasses
-- Class Instance: unique to each instance of a class
+- Class: shared with all instances of one class & its subclasses
+- Class Instance: unique to each instance of a class
- Instance Variables: unique to each instance
`"Comments are enclosed in quotes"`
@@ -53,7 +53,7 @@ Transcript cr. "carriage return / l
Transcript endEntry. "flush the output buffer"
```
-##Assignment:
+##Assignment:
```
| x y |
x _ 4. "assignment (Squeak) <-"
@@ -72,7 +72,7 @@ y := x deepCopy. "copy object and ins
y := x veryDeepCopy. "complete tree copy using a dictionary"
```
-##Constants:
+##Constants:
```
| b |
b := true. "true constant"
@@ -93,7 +93,7 @@ x := #('abc' 2 $a). "mixing of types all
```
-## Booleans:
+## Booleans:
```
| b x y |
x := 1. y := 2.
@@ -132,7 +132,7 @@ b := $A isLowercase. "test if lower case
```
-## Arithmetic expressions:
+## Arithmetic expressions:
```
| x |
x := 6 + 3. "addition"
@@ -190,7 +190,7 @@ x := 100 atRandom. "quick random number
```
-##Bitwise Manipulation:
+##Bitwise Manipulation:
```
| b x |
x := 16rFF bitAnd: 16r0F. "and bits"
@@ -207,7 +207,7 @@ b := 16rFF noMask: 16r0F. "test if all bits se
```
-## Conversion:
+## Conversion:
```
| x |
x := 3.99 asInteger. "convert number to integer (truncates in Squeak)"
@@ -223,15 +223,15 @@ x := 15 storeStringBase: 16.
```
-## Blocks:
-- blocks are objects and may be assigned to a variable
-- value is last expression evaluated unless explicit return
-- blocks may be nested
-- specification [ arguments | | localvars | expressions ]
-- Squeak does not currently support localvars in blocks
-- max of three arguments allowed
-- `^`expression terminates block & method (exits all nested blocks)
-- blocks intended for long term storage should not contain `^`
+## Blocks:
+- blocks are objects and may be assigned to a variable
+- value is last expression evaluated unless explicit return
+- blocks may be nested
+- specification [ arguments | | localvars | expressions ]
+- Squeak does not currently support localvars in blocks
+- max of three arguments allowed
+- `^`expression terminates block & method (exits all nested blocks)
+- blocks intended for long term storage should not contain `^`
```
| x y z |
@@ -241,18 +241,18 @@ Transcript show: (x value: 'First' value: 'Second'); cr. "use block with argu
"x := [ | z | z := 1.]. *** localvars not available in squeak blocks"
```
-## Method calls:
-- unary methods are messages with no arguments
-- binary methods
-- keyword methods are messages with selectors including colons standard categories/protocols: - initialize-release (methods called for new instance)
-- accessing (get/set methods)
-- testing (boolean tests - is)
-- comparing (boolean tests with parameter
-- displaying (gui related methods)
-- printing (methods for printing)
-- updating (receive notification of changes)
-- private (methods private to class)
-- instance-creation (class methods for creating instance)
+## Method calls:
+- unary methods are messages with no arguments
+- binary methods
+- keyword methods are messages with selectors including colons standard categories/protocols: - initialize-release (methods called for new instance)
+- accessing (get/set methods)
+- testing (boolean tests - is)
+- comparing (boolean tests with parameter
+- displaying (gui related methods)
+- printing (methods for printing)
+- updating (receive notification of changes)
+- private (methods private to class)
+- instance-creation (class methods for creating instance)
```
| x |
x := 2 sqrt. "unary message"
@@ -299,7 +299,7 @@ switch at: $C put: [Transcript show: 'Case C'; cr].
result := (switch at: $B) value.
```
-## Iteration statements:
+## Iteration statements:
```
| x y |
x := 4. y := 1.
@@ -311,7 +311,7 @@ x timesRepeat: [y := y * 2]. "times repear loop (
#(5 4 3) do: [:a | x := x + a]. "iterate over array elements"
```
-## Character:
+## Character:
```
| x y |
x := $A. "character assignment"
@@ -544,7 +544,7 @@ y := x asSet. "convert to set coll
```
## Set: like Bag except duplicates not allowed
-## IdentitySet: uses identity test (== rather than =)
+## IdentitySet: uses identity test (== rather than =)
```
| b x y sum max |
x := Set with: 4 with: 3 with: 2 with: 1. "create collection with up to 4 elements"
@@ -603,7 +603,7 @@ y := x asBag. "convert to bag coll
y := x asSet. "convert to set collection"
```
-##Associations:
+##Associations:
```
| x y |
x := #myVar->'hello'.