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How can I pad an integer with zeros on the left?
...ormance
public static void main(String[] args) {
Random rdm;
long start;
// Using own function
rdm = new Random(0);
start = System.nanoTime();
for(int i = 10000000; i != 0; i--){
lPadZero(rdm.nextInt(20000) - 10000, 4);
}
System.out.println("Own function: ...
How can I change the EditText text without triggering the Text Watcher?
...tcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (myEditText.hasFocus()) {
// is only executed if the EditText was directly changed by the user
}
}
//...
});
Long answer
As an addition to the short a...
How can I benchmark JavaScript code? [closed]
...
jsperf.com is the go-to site for testing JS performance. Start there. If you need a framework for running your own tests from the command line or scripts use Benchmark.js, the library upon which jsperf.com is built.
Note: Anyone testing Javascript code should educate themselves o...
What is the relationship between Looper, Handler and MessageQueue in Android?
...nd associated thread and message queue).
In typical usage, you create and start a HandlerThread, then create a Handler object (or objects) by which other threads can interact with the HandlerThread instance. The Handler must be created while running on the HandlerThread, although once created there...
Backup/Restore a dockerized PostgreSQL database
...tainer_name: Backup
image: prodrigestivill/postgres-backup-local
restart: always
volumes:
- ./backup:/backups
links:
- db:db
depends_on:
- db
environment:
- POSTGRES_HOST=db
- POSTGRES_DB=${DB_NAME}
- POSTGRES_USER=${DB_USER}
- POSTG...
Insert a string at a specific index
...adding new characters.
*
* @this {String}
* @param {number} start Index at which to start changing the string.
* @param {number} delCount An integer indicating the number of old chars to remove.
* @param {string} newSubStr The String that is spliced in.
* @return {strin...
Why would a JavaScript variable start with a dollar sign? [duplicate]
I quite often see JavaScript with variables that start with a dollar sign. When/why would you choose to prefix a variable in this way?
...
Xcode “The private key for is not installed on this mac - distributing”
...
This solved it for me without starting all the way from scratch:
1. Open Keychain Access on the machine that was used to generate the private keys
2. Select Keychains->Login and Category->Certificates on the left hand side
3. Locate the two certifi...
ANTLR: Is there a simple example?
I'd like to get started with ANTLR, but after spending a few hours reviewing the examples at the antlr.org site, I still can't get a clear understanding of the grammar to Java process.
...
Intel HAXM installation error - This computer does not support Intel Virtualization Technology (VT-x
...indow opens.
Uncheck Hyper-V and Windows Hypervisor Platform options and restart your system.
Now, you can Start HAXM installation without any error.
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