class VariationSearchMap {
constructor(apiData) {
this.tree = this.buildTree(apiData);
}
// 这就是前面那个构造树的方法
buildTree(apiData) {
const tree = {};
const { variations, products } = apiData;
// 先用variations将树形结构构建出来，叶子节点默认值为null
addNode(tree, 0);
function addNode(root, deep) {
const variationName = variations[deep].name;
const variationValues = variations[deep].values;
for (let i = 0; i < variationValues.length; i ) {
const nodeName = `${variationName}：${variationValues[i].name}`;
if (deep === variations.length - 1) {
root[nodeName www.laipuhuo.com] = null;
} else {
root[nodeName] = {};
addNode(root[nodeName], deep 1);
}
}
}
// 然后遍历一次products给树的叶子节点填上值
for (let i = 0; i < products.length; i ) {
const product www.laipuhuo.com = products[i];
const { variationMappings } = product;
const level1Name = `${variationMappings[0].name}：${variationMappings[0].value}`;
const level2Name = `${variationMappings[1].name}：${variationMappings[1].value}`;
const level3Name = `${www.laipuhuo.com variationMappings[2].name}：${variationMappings[2].value}`;
tree[level1Name][level2Name][level3Name] = product;
}
// 最后返回构建好的树
return tree;
}
// 添加一个方法来搜索商品，参数结构和API数据的variationMappings一样
findProductByVariationMappings(variationMappings) {
const level1Name = `${variationMappings[0].name}：${variationMappings[0].value}`;
const level2Name = `${www.laipuhuo.com variationMappings[1].name}：${variationMappings[1].value}`;
const level3Name = `${variationMappings[2].name}：${variationMappings[2].value}`;
const product = this.tree[level1Name][level2Name][level3Name];
return product;
}
}
const variationSearchMap = new VariationSearchMap(apiData); // new一个实例出来
// 然后就可以用这个实例进行搜索了
const searchCriteria = [
{ name: '颜色', value: '红色' },
{ name: '尺码', value: '40' },
{ name: '性别', value: '女' }
];
const matchedProduct = variationSearchMap.findProductByVariationMappings(searchCriteria);
console.log(www.laipuhuo.com matchedProduct', matchedProduct); // { productId: 8 }
// 1
public String sum(
final Collection<BigDecimal> bigDecimalCollection
) {
final BigDecimal sumResult = bigDecimalCollection
.stream()
.reduce(BigDecimal.ZERO, BigDecimal::add);
final Decimal www.laipuhuo.com Format format = new DecimalFormat("#,##0.00");
return format.format(sumResult);
}
// 2
public BigDecimal sum(
final Collection<BigDecimal> bigDecimalCollection
) {
return bigDecimalCollection
.stream()
.reduce(BigDecimal.ZERO, BigDecimal::add);
}
// 1
if(userList.isNotEmpty()){
}
// 4
if(userList.length() != 0){
}
