大约有 15,500 项符合查询结果（耗时：0.0185秒） [XML]
Difference between float and double in php?
...
In PHP 7.0.14
function test(double $a) {
var_dump($a);
}
test(2.2111);
Returns "Fatal error: Uncaught TypeError: Argument 1 passed to test() must be an instance of double, float given".
function test(float $a) {
var_dump($a);
}
test(2.2...
Check if table exists and if it doesn't exist, create it in SQL Server 2008
...reate a sample database with a table by the below script:
CREATE DATABASE Test
GO
USE Test
GO
CREATE TABLE dbo.tblTest (Id INT, Name NVARCHAR(50))
Approach 1: Using INFORMATION_SCHEMA.TABLES view
We can write a query like below to check if a tblTest Table exists in the current database.
IF EXIS...
“f” after number
...a small, minimal snippet ie like this
#import <Cocoa/Cocoa.h>
void test() {
CGRect r = CGRectMake(0.0f, 0.0f, 320.0f, 50.0f);
NSLog(@"%f", r.size.width);
}
Then compile it to assembler with the -S option.
gcc -S test.m
Save the assembler output in the test.s file and remove .0f fro...
How to use a variable for the database name in T-SQL?
... where did I get the word "SERVERNAME" from?
Here's some code that I just tested (and which works):
DECLARE @DBNAME VARCHAR(255)
SET @DBNAME = 'TestDB'
DECLARE @CREATE_TEMPLATE VARCHAR(MAX)
DECLARE @COMPAT_TEMPLATE VARCHAR(MAX)
DECLARE @RECOVERY_TEMPLATE VARCHAR(MAX)
SET @CREATE_TEMPLATE = 'CREA...
Difference between a user and a schema in Oracle?
...e an object in the schema owner.
CONN schema_owner/password
CREATE TABLE test_tab (
id NUMBER,
description VARCHAR2(50),
CONSTRAINT test_tab_pk PRIMARY KEY (id)
);
GRANT SELECT ON test_tab TO schema_ro_role;
GRANT SELECT, INSERT, UPDATE, DELETE ON test_tab TO schema_rw_role;
...
What is the difference between “Class.forName()” and “Class.forName().newInstance()”?
...ou to understand things better. So, consider the following class:
package test;
public class Demo {
public Demo() {
System.out.println("Hi!");
}
public static void main(String[] args) throws Exception {
Class clazz = Class.forName("test.Demo");
Demo demo = (De...
How to escape @ characters in Subversion managed file names?
...ws you to target a specific revision of that file. For example, "svn info test.txt@1234" will give information about test.txt as it existed in revision 1234.
...
Null vs. False vs. 0 in PHP
...f them have a value in a boolean context, which (in PHP) is False.
If you test it with ==, it's testing the boolean value, so you will get equality. If you test it with ===, it will test the type, and you will get inequality.
So why are they useful ?
Well, look at the strrpos() function. It retur...
phpunit mock method multiple calls with different arguments
... {
public function Query($sSql) {
return "";
}
}
class fooTest extends PHPUnit_Framework_TestCase {
public function testMock() {
$mock = $this->getMock('DB', array('Query'));
$mock
->expects($this->exactly(2))
->method('Que...
How to upper case every first letter of word in a string? [duplicate]
...
String wordStr = WordUtils.capitalize("this is first WORD capital test.");
//Capitalize method capitalizes only first character of a String
System.out.println("wordStr= " + wordStr);
wordStr = WordUtils.capitalizeFully("this is first WORD capital test.");
//...