62 lines
1.5 KiB
HTML
62 lines
1.5 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Title</title>
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</head>
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<body>
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<script>
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/*
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最基本的散列表
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*/
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class HashTable {
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constructor() {
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this.table=[];
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}
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//散列函数
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loseHashCode(key){
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var hash=0;
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//从ASCII表中查到的ASCII值加到hash中
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for (var i=0;i<key.length;i++){
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hash+=key.charCodeAt(i);
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}
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//为了得到比较小的数值，我们会用hash和任意数除余
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return hash%37;
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}
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//向散列表增加一个新的项
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put(key,value){
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var position=this.loseHashCode(key);
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console.log(position+'-'+key);
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this.table[position]=value;
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}
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//根据键从散列表删除值
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remove(key){
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this.table[this.loseHashCode(key)]=undefined;
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}
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//返回根据键值检索到的特定的值
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get(key){
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console.log(this.table[this.loseHashCode(key)])
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}
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print(){
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for (var i=0;i<this.table.length;++i){
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if (this.table[i]!==undefined){
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console.log(i+':'+this.table[i]);
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}
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}
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}
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}
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var hash = new HashTable();
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hash.put('Gandalf', 'gandalf@email.com');
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hash.put('John', 'johnsnow@email.com');
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hash.put('Tyrion', 'tyrion@email.com');
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hash.remove('Gandalf')
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hash.get('Gandalf')
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hash.get('Tyrion')
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hash.print()
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//
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</script>
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</body>
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</html>
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