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Select2 dropdown but allow new values by user?
I want to have a dropdown with a set of values but also allow the user to "select" a new value not listed there.
9 Answers...
How to check if a Constraint exists in Sql server?
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try this:
SELECT
*
FROM INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS
WHERE CONSTRAINT_NAME ='FK_ChannelPlayerSkins_Channels'
-- EDIT --
When I originally answered this question, I was thinking "Foreign Key" because the o...
Can someone explain collection_select to me in clear, simple terms?
I am going through the Rails API docs for collection_select and they are god-awful.
2 Answers
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How do I check if a number is positive or negative in C#?
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This is the industry standard:
int is_negative(float num)
{
char *p = (char*) malloc(20);
sprintf(p, "%f", num);
return p[0] == '-';
}
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A std::map that keep track of the order of insertion?
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Thats great! Boost even has a member-selector to do the job!
– xtofl
Jul 8 '09 at 14:19
2
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How to implement “select all” check box in HTML?
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Using jQuery:
// Listen for click on toggle checkbox
$('#select-all').click(function(event) {
if(this.checked) {
// Iterate each checkbox
$(':checkbox').each(function() {
this.checked = true;
});
} else {
...
C++使用OLE/COM高速读写EXCEL的源码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ad = FALSE);
///通过名称使用某个sheet，
BOOL LoadSheet(const TCHAR* sheet,BOOL pre_load = FALSE);
///通过序号取得某个Sheet的名称
CString GetSheetName(long table_index);
///得到Sheet的总数
int GetSheetCount();
///打开文件
BOOL OpenExcelFile(const TCHAR...
SQL - find records from one table which don't exist in another
...shortest statement, and may be quickest if your phone book is very short:
SELECT *
FROM Call
WHERE phone_number NOT IN (SELECT phone_number FROM Phone_book)
alternatively (thanks to Alterlife)
SELECT *
FROM Call
WHERE NOT EXISTS
(SELECT *
FROM Phone_book
WHERE Phone_book.phon...
How do I use variables in Oracle SQL Developer?
... other stuff didn't work for me, but this did:
define value1 = 'sysdate'
SELECT &&value1 from dual;
Also it's the slickest way presented here, yet.
(If you omit the "define"-part you'll be prompted for that value)
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How can I list all foreign keys referencing a given table in SQL Server?
...get around this by creating a table, store the result into the table, then select the specific columns. Check out this link for an example :).
– John Odom
Apr 28 '15 at 19:04
3
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