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Yaroslav Shlapak yaroslav-shlapak

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@adrbtk
adrbtk / gist:c8cb0381e7ce2283a77e2cc80aba40d3
Last active May 28, 2021 11:00
Configure removing of logging in android release build
  1. Add next lines to the file proguard-rules.pro
-optimizations code/removal/*
-assumenosideeffects class android.util.Log {
    public static boolean isLoggable(java.lang.String, int);
    public static int v(...);
    public static int d(...);
    public static int i(...);
 public static int w(...);
@fntlnz
fntlnz / self-signed-certificate-with-custom-ca.md
Last active March 14, 2026 06:53
Self Signed Certificate with Custom Root CA

Create Root CA (Done once)

Last update: Nov 2025.

Create Root Key

Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!

openssl ecparam -genkey -name secp384r1 | openssl ec -aes256 -out rootCA.key
@iSergius
iSergius / Java Collections Complexity cheatsheet
Created September 3, 2016 14:52
Below are the Big O performance of common functions of different Java Collections.
List | Add | Remove | Get | Contains | Next | Data Structure
---------------------|------|--------|------|----------|------|---------------
ArrayList | O(1) | O(n) | O(1) | O(n) | O(1) | Array
LinkedList | O(1) | O(1) | O(n) | O(n) | O(1) | Linked List
CopyOnWriteArrayList | O(n) | O(n) | O(1) | O(n) | O(1) | Array
@polbins
polbins / README.md
Last active September 18, 2025 07:58
Android Studio as default Git Diff Tool

Create Android Studio Command-line Launcher

  1. Open Android Studio
  2. Go to: Tools > Create Command-line Launcher
  3. Leave as default, Press OK

Configure Git to use Android Studio as default Diff Tool

  1. Add the following lines to your .gitconfig
@psayre23
psayre23 / gist:c30a821239f4818b0709
Last active March 9, 2026 09:44
Runtime Complexity of Java Collections
Below are the Big O performance of common functions of different Java Collections.
List | Add | Remove | Get | Contains | Next | Data Structure
---------------------|------|--------|------|----------|------|---------------
ArrayList | O(1) | O(n) | O(1) | O(n) | O(1) | Array
LinkedList | O(1) | O(1) | O(n) | O(n) | O(1) | Linked List
CopyOnWriteArrayList | O(n) | O(n) | O(1) | O(n) | O(1) | Array