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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...
Servlet returns “HTTP Status 404 The requested resource (/servlet) is not available”
.../servlet/* instead. See also Servlet and path parameters like /xyz/{value}/test, how to map in web.xml?
@WebServlet works only on Servlet 3.0 or newer
In order to use @WebServlet, you only need to make sure that your web.xml file, if any (it's optional since Servlet 3.0), is declared conform Servl...
VS2005混合编译ARM汇编代码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...（以Larry Bank的code为例）
ARM汇编代码，文件命名为armtest.asm：
; TITLE("Sample App")
;++
AREA sample, CODE, READONLY ; name this block of code
EXPORT TEST
IMPORT iGlobal
;
; Called from C as int ARMTEST1(int, int, int, int);
; The first 4 par...
What is the --save option for npm install?
...is is useful when installing development-only packages, like grunt or your testing library.
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Pure JavaScript: a function like jQuery's isNumeric() [duplicate]
...
var str = 'test343',
isNumeric = /^[-+]?(\d+|\d+\.\d*|\d*\.\d+)$/;
isNumeric.test(str);
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node.js, socket.io with SSL
...re('https');
var server = https.createServer({
key: fs.readFileSync('./test_key.key'),
cert: fs.readFileSync('./test_cert.crt'),
ca: fs.readFileSync('./test_ca.crt'),
requestCert: false,
rejectUnauthorized: false
},app);
server.listen(8080);
var io = require('socket.io').listen(...
【解决】File does not reside within any path specified using proto_pat...
...pecified-using-proto-path使用protoc编译 proto文件时报错： main test test proto: File does not reside within any path specified using --proto_path (or -I) You must specify 使用protoc编译.proto文件时报错：
../main/test/test.proto: File does not reside within any path spec...
HTML5 form required attribute. Set custom validation message?
...use the field to be considered invalid; therefore you must clear it before testing validity, you can't just set it and forget.
Further edit
As pointed out in @thomasvdb's comment below, you need to clear the custom validity in some event outside of invalid otherwise there may be an extra pass throug...
MySQL: Sort GROUP_CONCAT values
....html#function_group-concat:
SELECT student_name,
GROUP_CONCAT(DISTINCT test_score ORDER BY test_score DESC SEPARATOR ' ')
FROM student
GROUP BY student_name;
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Print all but the first three columns
...release, GNU Awk 3.1.5) but found here another way: echo ' This is a test' | awk '{print substr($0, index($0,$3))}'
– elysch
Dec 18 '14 at 18:45
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