小编Aji*_*kya的帖子

我想检索 dynamodb 中最新插入的记录，以便每当插入新记录时，dynamodb 表都会触发 lambda 并获取该记录并将其传递给 python 脚本。

我正在用 Python 2.7 编写 lambda

import json
import boto3
from boto3.dynamodb.conditions import Key, Attr

def lambda_handler(event, context):
  dynamodb = boto3.resource('dynamodb')
  table = dynamodb.Table("html_contents")
  try:
     if (record.eventName == "INSERT") {
         #How to Retrieve the latest record 
     }
  except Exception, e:
    print(e)

我有2个1d数组,我试图将它们填充到JAVA中的单个2d数组中.

例如:

a[] = {2,7} 
b[] = {9,1} 

结果应该是:

result[][] = {{2,9}, {7,1}}

这是我的代码

    import java.util.Arrays;
    import java.util.Scanner;

    public class Main {

public static void main(String[] args) {

    Scanner sc = new Scanner(System.in);
    System.out.println("Enter Test Cases:\t");
    int t = sc.nextInt();
    int[] a;
    int[] b;
    int i, j, x;
    for (int k = 0; k < t; k++) {
        System.out.println("Enter 1st Array Limit:\t");
        int len = sc.nextInt();

        System.out.println("Enter 2nd Array Limit:\t");
        int len1 = sc.nextInt();
        a = new int[len];
        b = …

如何在Angular 2中创建d3饼图如果我想计算EMI.我已经为EMI计算创建了应用程序.现在我想显示关于计算的PIE图表

这是emi.component.ts

import { Component } from '@angular/core';
import { FormGroup, FormControl, Validators } from '@angular/forms'
import * as D3 from 'd3';


@Component({
    selector: 'emi-app',
    templateUrl: 'app/emi/emi.component.html',
    styleUrls:['app/emi/emi.component.css']
})
export class EmiComponent  { 
    loanamount:number
    interestrate:number
    loantenure:number
    emi:number
    newemi:number


    emiForm = new FormGroup({
        loanamount: new FormControl(null, [Validators.required]),
        interestrate: new FormControl(null, [Validators.required]),
        loantenure: new FormControl(null, [Validators.required]),

    });

    calculateEmi() {

        if(this.loanamount && this.interestrate && this.loantenure) {
            let interestPerMonth = this.interestrate/12/100;
            let numerator = Math.pow((1+interestPerMonth), this.loantenure);
            let denominator = numerator - 1;
            this.emi …