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Jide Kareem jidekrm

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@iRYO400
iRYO400 / ConnectivityMonitor.kt
Created April 30, 2020 09:41
Check Internet Connection [API21+][API29+ supported] Lifecycle aware
import android.content.Context
import android.content.Context.CONNECTIVITY_SERVICE
import android.net.ConnectivityManager
import android.net.Network
import android.net.NetworkCapabilities
import android.net.NetworkRequest
import androidx.lifecycle.Lifecycle
import androidx.lifecycle.LifecycleObserver
import androidx.lifecycle.LifecycleOwner
import androidx.lifecycle.OnLifecycleEvent
@GokhanArik
GokhanArik / NetworkStateManager.kt
Created March 12, 2020 03:11
Check Internet Connection in Android 21+
package manager
import android.content.Context
import android.net.ConnectivityManager
import android.net.Network
import android.net.NetworkCapabilities
import android.net.NetworkRequest
import android.os.Build
import android.util.Log
import com.jakewharton.rxrelay2.BehaviorRelay
@FedericoPonzi
FedericoPonzi / big-o-java-collections.md
Last active December 18, 2024 16:07
Big O notation for java's collections

The book Java Generics and Collections has this information (pages: 188, 211, 222, 240).

List implementations:

                      get  add  contains next remove(0) iterator.remove
ArrayList             O(1) O(1) O(n)     O(1) O(n)      O(n)
LinkedList O(n) O(1) O(n) O(1) O(1) O(1)
@gholker
gholker / JpgToPdf.java
Last active April 3, 2025 15:32
JPG to PDF in Java
import com.itextpdf.text.Document;
import com.itextpdf.text.Image;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.pdf.PdfWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.List;