package mainimport ("fmt""encoding/json""log""github.com/aws/aws-lambda-go/events""github.com/aws/aws-lambda-go/lambda")func main() {lambda.Start(handler)}func handler(request events.APIGatewayProxyRequest) (events.APIGatewayProxyResponse, error) {var person Person//json request body se nikaal ke person var me rakh dengeerr := json.Unmarshal([]byte(request.Body), &person)if err !=nil {return events.APIGatewayProxyResponse{}, err}//ab person se firstname aur lastname nikaal ke msg bana lengemsg := fmt.Sprintf("Hello %v %v", *person.FirstName, *person.LastName)responseBody := ResponseBody{Message: &msg,}jbytes, err := json.Marshal(responseBody)if err !=nil {return events.APIGatewayProxyResponse{}, err}log.Println("hello world Nihal")response := events.APIGatewayProxyResponse{StatusCode: 200,Body: string(jbytes),}return response, nil}type Person struct {FirstName *string `json:"firstName"`LastName *string `json:"lastName"`}type ResponseBody struct {Message *string `json:"message"`}
Just programming
Wednesday 10 May 2023
Uploading and Running Lambda function in AWS
Friday 8 July 2022
Subset Sum with Recursion | memorization | DP
Given a set of non-negative integers, and a value sum, determine if there is a subset of the given set with sum equal to given sum.
https://www.geeksforgeeks.org/subset-sum-problem-dp-25/
Recursion
class Solution {
static boolean isSumK(int[] nums, int curin, int curSum) {
if(curSum==0) {
return true;
}
if(curin<0) {
return false;
}
return isSumK(nums, curin-1, curSum-nums[curin])
|| isSumK(nums, curin-1, curSum);
}
With Memorization
class Solution{
static int issum(int arr[], int indx, int sum, int dp[][]) {
if(sum==0)
return 1;
if(indx<0)
return 0;
if(dp[indx][sum]!=-1)
return dp[indx][sum];
int pick = 0;
if(sum>=arr[indx])
pick = issum(arr, indx-1, sum-arr[indx],dp);
int notpick = issum(arr, indx-1, sum,dp);
if(pick==1 || notpick==1)
return dp[indx][sum] = 1;
return dp[indx][sum] = 0;
}
Thursday 16 June 2022
Subset sum K [Recursion]
https://www.geeksforgeeks.org/subset-sum-problem-dp-25/
class Solution {
static boolean isSumK(int[] nums, int curin, int curSum) {
if(curSum==0) {
return true;
}
if(curin<0) {
return false;
}
return isSumK(nums, curin-1, curSum-nums[curin])
|| isSumK(nums, curin-1, curSum);
}
static Boolean isSubsetSum(int N, int arr[], int sum) {
// code here
return isSumK(arr, N-1, sum);
}
}
Saturday 11 June 2022
Java Practice [HashMap]
Group Anagrams https://leetcode.com/problems/group-anagrams/
class Solution {
public List<List<String>> groupAnagrams(String[] strs) {
HashMap<String, List<String>> hm = new HashMap<>();
for(int i=0;i<strs.length;i++) {
char[] s = strs[i].toCharArray();
Arrays.sort(s);
String k = new String(s);
if(hm.containsKey(k)) {
hm.get(k).add(strs[i]);
} else {
List<String> ls = new ArrayList<String>();
ls.add(strs[i]);
hm.put(k,ls);
}
}
List<List<String>> ans = new ArrayList<List<String>>();;
for (String p:hm.keySet()) {
ans.add(hm.get(p));
}
return ans;
}
}
Saturday 28 May 2022
Linked List in Java without Collections
- Linked List in Java without Collections
class Node {
int data;
Node next;
Node(int data) {
this.data = data;
this.next = null;
}
}
public class Main {
public static void main(String[] args) {
Node n1 = new Node(5);
Node n2 = new Node(6);
Node n3 = new Node(7);
Node n4 = new Node(8);
n1.next = n2;
n2.next = n3;
n3.next = n4;
Node start = n1;
while(start!=null) {
System.out.println(start.data+" ");
start = start.next;
}
}
}
Tuesday 6 June 2017
Syscloud PHP developer Interview Questions
The Questions they asked was basic only.
Questions related to Webserver & PHP:-
1) How to configure apache webserver ?
2) Where is the configuration file of PHP ?
3) How server and client communication happens?
4) Explain about different methods(POST ,GET ,PUT ) ?
Apart from that they asked basic SQL Questions like :-
1) What is the difference between Truncate and Delete ?
2) How to drop table schema ?
they also asked a Programming question
1) Write a Program to reverse a string
Viewing this video tutorial will help:- https://www.youtube.com/watch?v=1ZioHruINOA&list=PLtGnc4I6s8dsNLpl0G30Azcc-Q4eoM4TX
Sunday 28 May 2017
Getting Started With MEAN App Development with AngularJs , ExpressJs , NodeJs and MongoDB.
Getting Started With MEAN App Development
I also deployed my app on google-cloud-platform (https://contact-list-app-170421.appspot.com/).I have taken help from these two articles (https://cloud.google.com/community/tutorials/run-expressjs-on-google-app-engine) and (https://cloud.google.com/sdk/docs/#deb).
I will Provide the code in my next Blog. Feel free to contact in case of any help.
Thanks
Nikhil
Uploading and Running Lambda function in AWS
Main.go package main import ( "fmt" "encoding/json" "log" "github.com/aws/aws-lambda-g...
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http://codeforces.com/contest/476/problem/B #include < bits / stdc ++. h > using namespace std ; string s1 , s2 ; int val ...
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http://codeforces.com/contest/476/problem/A #include < bits / stdc ++. h > using namespace std ; int dp [ 10001 ][ 5055 ];...
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http://www.spoj.com/problems/DQUERY/en/ DQUERY -...