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Why is 128==128 false but 127==127 is true when comparing Integer wrappers in Java?
...rrectly and you should see the correct behavior:
public static void main (String[] args) {
Byte b1=127;
Byte b2=127;
Short s1=127; //incorrect should use Byte
Short s2=127; //incorrect should use Byte
Short s3=128;
Short s4=128;
Integer i1=127; //incorrect should use B...
What are the -Xms and -Xmx parameters when starting JVM?
...nary_prefix. In addition, because some unusable space is set aside for an extra pool of Survivor space, the amount of memory actually available according to Runtime.getRuntime().maxMemory() is less than the value specified via -Xmx
– nealmcb
Sep 30 '15 at 5:20...
Is there a date format to display the day of the week in java?
...rmatter f = DateTimeFormatter.ofPattern( “uuuu-MM-EEE” , Locale.US ) ;
String output = ld.format( f ) ;
ISO 8601
By the way, you may be interested in the standard ISO 8601 week numbering scheme: yyyy-Www-d.
2018-W01-2
Week # 1 has the first Thursday of the calendar-year. Week starts on...
Vim multiline editing like in sublimetext?
...d;
asd "asd asd asd asd;
asd "asd asd asd asd;
Put the cursor on the last char of the third word:
asd "asd as|d| asd asd;
asd "asd asd asd asd;
asd "asd asd asd asd;
asd "asd asd asd asd;
asd "asd asd asd asd;
asd "asd asd asd asd;
asd "asd asd asd asd;
Hit <C-v> to enter visual-block mode ...
PHP substring extraction. Get the string before the first '/' or the whole string
I am trying to extract a substring. I need some help with doing it in PHP.
15 Answers
...
How do you set a default value for a MySQL Datetime column?
...--------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+-------------------+-------+
| str | varchar(32) | YES | | NULL | |
| ts | timestamp | NO | | CURRENT_TIMESTAMP | |
+-------+-----------...
Protecting Java Source Code From Being Accessed [closed]
...
Extension: In any string literal, replace some blanks with a character that looks like a blank. Like character #255 in ASCII, or the "unwrappable blank" in unicode. Most newbies won´t note the difference, and it will allow you to indiciate wh...
Polymorphism: Why use “List list = new ArrayList” instead of “ArrayList list = new ArrayList”? [dupl
... do is to cast your list down to an ArrayList. Here's an example:
List<String> list = new ArrayList<String>();
((ArrayList<String>) list).ensureCapacity(19);
Ultimately I think tsatiz is correct as once you cast to an ArrayList you're no longer coding to an interface. However, i...
How can I solve a connection pool problem between ASP.NET and SQL Server?
...d Close throws an exception:
var connection = new SqlConnection(connectionString);
connection.Open();
// some code
connection.Close();
The correct way would be this:
var connection = new SqlConnection(ConnectionString);
try
{
connection.Open();
someCall (connection);
}
...
Representing null in JSON
...son2 = '{"myCount": null}';
var json3 = '{"myCount": 0}';
var json4 = '{"myString": ""}';
var json5 = '{"myString": "null"}';
var json6 = '{"myArray": []}';
console.log(JSON.parse(json1)); // {}
console.log(JSON.parse(json2)); // {myCount: null}
console.log(JSON.parse(json3)); // {myCount: 0}
conso...