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上一节，我们用typescript语言实现了一个支持泛型的HashMap类，
这一节，我们要实现HashSet起来，就太容易了。
话不多说，直接上码！！
HashSet.ts
namespace
sunnyboxs
{
export
class
HashSet<
T> {
private
items: { [
key:
string]:
T; };
constructor()
{
this.
items = {};
}
public
add(
key:
string,
value:
T):
void
{
this.
items[
key] =
value;
}
public
del(
key:
string):
boolean
{
return
delete
this.
items[
key];
}
public
has(
key:
string):
boolean
{
return
key
in
this.
items;
}
public
get(
key:
string):
T
{
return
this.
items[
key];
}
public
length():
number
{
return
Object.
keys(
this.
items).
length;
}
public
forEach(
f: { (
key:
string,
val:
any):
void })
{
for (
let
k
in
this.
items)
{
f(
k,
this.
items[
k]);
}
}
}
}
测试应用代码如下：
var
m:
HashSet<
string> =
new
HashSet<
string>();
m.
add(
"key1",
"val1");
m.
add(
"key2",
"val2");
m.
add(
"key3",
"val3");
console.
log(
m);
// 遍历方法
m.
forEach(
function (
k,
v)
{
console.
log(
k +
":" +
v);
});
在浏览器中输出调试结果：
HashSet
key1:val1
key2:val2
key3:val3
OK！大功告成！！！