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Why (0-6) is -6 = False? [duplicate]
...s only an implementation detail of CPython and you shouldn't rely on this. For instance, PyPy implemented the id of integer to return itself, so (0-6) is -6 is always true even if they are "different objects" internally; it also allows you to configure whether to enable this integer caching, and eve...
Android: how to make keyboard enter button say “Search” and handle its click?
...) {
if (actionId == EditorInfo.IME_ACTION_SEARCH) {
performSearch();
return true;
}
return false;
}
});
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Handling optional parameters in javascript
...: function(){ alert('hi'); }
} );
Benefits:
you don't have to account for argument order
you don't have to do type checking
it's easier to define default values because no type checking is necessary
less headaches. imagine if you added a fourth argument, you'd have to update your type checking ...
MySQL Data - Best way to implement paging?
...tain offset up to the end of the result set, you can use some large number for the second parameter. This statement retrieves all rows from the 96th row to the last:
SELECT * FROM tbl LIMIT 95,18446744073709551615;
With one argument, the value specifies the number of rows to return from the beginni...
Best way to test if a row exists in a MySQL table
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Test with ...EXISTS( SELECT 1/0 FROM someothertable). For SQL Server & Oracle - it makes no difference to use *, 1 or NULL because EXISTS only tests for a boolean based on 1+ of the WHERE criteria matching.
– OMG Ponies
Nov 4 '09 at 23:...
Changing the image source using jQuery
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You can use jQuery's attr() function. For example, if your img tag has an id attribute of 'my_image', you would do this:
<img id="my_image" src="first.jpg"/>
Then you can change the src of your image with jQuery like this:
$("#my_image").attr("src","sec...
How to check if an int is a null
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Of course, for local variable cannot be uninitialized, it's invalid code, Java won't permit it, as declared in its specification.
– Alex
Mar 7 at 21:43
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Is there a way to access the “previous row” value in a SELECT statement?
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SQL has no built in notion of order, so you need to order by some column for this to be meaningful. Something like this:
select t1.value - t2.value from table t1, table t2
where t1.primaryKey = t2.primaryKey - 1
If you know how to order things but not how to get the previous value given the cu...
Yii2 data provider default sorting
In Yii 1.1 this code works for default sorting:
8 Answers
8
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Adding elements to object
...y;
cart.push(element);
If you want cart to be an array of objects in the form { element: { id: 10, quantity: 1} } then perform:
var element = {}, cart = [];
element.id = id;
element.quantity = quantity;
cart.push({element: element});
JSON.stringify() was mentioned as a concern in the comment:
...