大约有 15,461 项符合查询结果（耗时：0.0237秒） [XML]
Does static constexpr variable inside a function make sense?
...< addr_str.substr(addr_size - offset) << std::endl;
}
// here we test initialization of const variable (runtime)
void const_value(const short counter)
{
static short temp = const_short;
const short const_var = ++temp;
print_properties("const", &const_var, addr_offset);
...
Javascript Drag and drop for touch devices [closed]
...ems in that preventDefault was preventing scrolling on the ipad - I am now testing for draggable items and it works great so far.
if (event.target.id == 'draggable_item' ) {
event.preventDefault();
}
share
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...
How can I redirect HTTP requests made from an iPad?
...
Another, easier way to do this is with a tool I wrote: testProxy. No configuration necessary: github.com/edwinm/testProxy
– edwin
May 11 '17 at 17:27
...
The performance impact of using instanceof in Java
...t is a little faster than doing an instanceof, but the difference my quick test found was 10-20ms over 10,000,000 iterations. If "object" isn't an ObjT, though, catching the exception was over 3000x slower - over 31,000ms vs ~10ms for the instanceof.
– Steve
Fe...
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...