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How to determine an object's class?
...new SomeClass();
instance.getClass().getName(); //will return the name (as String) (== "SomeClass")
instance.getClass(); //will return the SomeClass' Class object
HTH. But I think most of the time it is no good practice to use that for control flow or something similar...
...
Efficiently updating database using SQLAlchemy ORM
... the fields manually:
from sqlalchemy import Column, ForeignKey, Integer, String, Date, DateTime, text, create_engine
from sqlalchemy.exc import IntegrityError
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from sqlalchemy.orm.attributes import Instr...
Should I initialize variable within constructor or outside constructor [duplicate]
...fference .But in some case initializing in constructor makes sense.
class String
{
char[] arr/*=char [20]*/; //Here initializing char[] over here will not make sense.
String()
{
this.arr=new char[0];
}
String(char[] arr)
{
this.arr=arr;
}
}
So depending...
Stop Chrome Caching My JS Files
...a PERMANENT solution for ALL of your users. The best way is a random query string at the end of the src. src="someJs.js?someRandomStringCreatedByInlineJsOrServerRenderedCode" which would make it so that it had a fresh version everytime. a good random string would be to grab todays date/time and thro...
Stop caching for PHP 5.5.3 in MAMP
...n-zts-20121212/opcache.so"
opcache.memory_consumption=128
opcache.interned_strings_buffer=8
opcache.max_accelerated_files=4000
opcache.revalidate_freq=60
opcache.fast_shutdown=1
opcache.enable_cli=1
enable=0
Must be added under [OPcache] in php.ini.
Disables OPcache.
Requires MAMP server restart.
...
When & why to use delegates? [duplicate]
... define a person
/// </summary>
public class Person {
public string Name { get; set; }
public int Age { get; set; }
}
class Program {
//Our delegate
public delegate bool FilterDelegate(Person p);
static void Main(string[] args) {
//Create 4 Person objects
...
How to search a specific value in all tables (PostgreSQL)?
...
can you explain in detail .. ? How to search string 'ABC' into all tables ?
– Mr. Bhosale
Jan 28 '17 at 6:47
1
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Calculate size of Object in Java [duplicate]
...te static Instrumentation instrumentation;
public static void premain(String args, Instrumentation inst) {
instrumentation = inst;
}
public static long getObjectSize(Object o) {
return instrumentation.getObjectSize(o);
}
}
Use getObjectSize:
public class C {
pr...
Convert a PHP object to an associative array
...
It you have integer keys the'll be converted in to string and this can cause big issue. E.g. [1 => "one"] becomes ["1" => "one"]
– Oleg
Aug 11 '15 at 12:16
...
Not equal != operator on NULL
... you give an appropriate datatype for the sentinel value x (in this case a string/char). This is TSQL syntax but Oracle and other engines have similar features.
– systemaddict
Jun 27 '17 at 20:25
...