大约有 44,000 项符合查询结果（耗时：0.0620秒） [XML]
Rails auto-assigning id that already exists
...mpany.id column to the highest value in the table with a query like this:
SELECT setval('company_id_seq', (SELECT max(id) FROM company));
I am guessing at your sequence name "company_id_seq", table name "company", and column name "id" ... please replace them with the correct ones. You can get the...
Are the days of passing const std::string & as a parameter over?
...ring has various components including a pointer into the heap and a member char[] for short string optimization. So it seems to me that passing by reference is still a good idea. Can anyone explain why Herb might have said this?
If stack size is a concern (and assuming this is not inlined/optimize...
How to perform mouseover function in Selenium WebDriver using Java?
...xpression (I don't really want to add this comment but SO insist on ">6 chars edit"...
Consumer < By > hover = (By by) -> {
action.moveToElement(driver.findElement(by))
.perform();
};
@Test
public void hoverTest() {
driver.get("https://www.b...
django : using select_related and get_object_or_404 together
Is there any way of using get_object_or_404 and select_related together or any other way to achieve the result of using these two together(except from putting it in try/except)??
...
How to update a menu item shown in the ActionBar?
... set a condition in oncreateOptionMenu().
For example:
Boolean mISQuizItemSelected = false;
/**
* Called to inflate the action bar menus
*
* @param menu
* the menu
*
* @return true, if successful
*/
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu ite...
How do I use jQuery's form.serialize but exclude empty fields
... looking over the jQuery docs and I think we can do this in one line using selectors:
$("#myForm :input[value!='']").serialize() // does the job!
Obviously #myForm gets the element with id "myForm" but what was less obvious to me at first was that the space character is needed between #myForm and...
SQL Logic Operator Precedence: And and Or
...te:
Declare @x tinyInt = 1
Declare @y tinyInt = 0
Declare @z tinyInt = 0
Select Case When @x=1 OR @y=1 And @z=1 Then 'T' Else 'F' End -- outputs T
Select Case When (@x=1 OR @y=1) And @z=1 Then 'T' Else 'F' End -- outputs F
For those who like to consult references (in alphabetic order):
Microso...
Obtain form input fields using jQuery?
...s[field.name] = field.value;
});
Note that this snippet will fail on <select multiple> elements.
It appears that the new HTML 5 form inputs don't work with serializeArray in jQuery version 1.3. This works in version 1.4+
...
How to show all privileges from a user in oracle?
...
You can try these below views.
SELECT * FROM USER_SYS_PRIVS;
SELECT * FROM USER_TAB_PRIVS;
SELECT * FROM USER_ROLE_PRIVS;
DBAs and other power users can find the privileges granted to other users with the DBA_ versions of these same views. They are cov...
how to check if a form is valid programmatically using jQuery Validation Plugin
... jQuery Validation plugin:
$("#form_id").valid();
Checks whether the selected form is valid or whether all selected
elements are valid. validate() needs to be called on the form before
checking it using this method.
Where the form with id='form_id' is a form that has already had .validat...