大约有 18,400 项符合查询结果（耗时：0.0296秒） [XML]
Why does `a == b or c or d` always evaluate to True?
... == "Kevin" or name == "Jon" or name == "Inbar":
Compose a sequence of valid values, and use the in operator to test for membership:
if name in {"Kevin", "Jon", "Inbar"}:
In general of the two the second should be preferred as it's easier to read and also faster:
>>> import timeit
>&g...
How do I find which transaction is causing a “Waiting for table metadata lock” state?
...ist of blocking transactions:
SELECT *
FROM INNODB_LOCKS
WHERE LOCK_TRX_ID IN (SELECT BLOCKING_TRX_ID FROM INNODB_LOCK_WAITS);
OR
SELECT INNODB_LOCKS.*
FROM INNODB_LOCKS
JOIN INNODB_LOCK_WAITS
ON (INNODB_LOCKS.LOCK_TRX_ID = INNODB_LOCK_WAITS.BLOCKING_TRX_ID);
A List of locks on particular...
ng-repeat :filter by single field
...p.controller('FooCtrl', function($scope) {
$scope.products = [
{ id: 1, name: 'test', color: 'red' },
{ id: 2, name: 'bob', color: 'blue' }
/*... etc... */
];
});
<div ng-repeat="product in products | filter: { color: 'red' }">
This can of course be passed in by...
How To Create Table with Identity Column
I have an existing table that I am about to blow away because I did not create it with the ID column set to be the table's Identity column.
...
Replace Fragment inside a ViewPager
... author.
I'd like to start by answering the author's question about which ID he should use; it is ID of the container, i.e. ID of the view pager itself. However, as you probably noticed yourself, using that ID in your code causes nothing to happen. I will explain why:
First of all, to make ViewPag...
How to add leading zeros?
...igits to begin with, so let's try a harder example of making powers of 10 width 8 too.
anim <- 25499:25504
x <- 10 ^ (0:5)
paste (and it's variant paste0) are often the first string manipulation functions that you come across. They aren't really designed for manipulating numbers, but the...
Difference between “read commited” and “repeatable read”
...le T with a column C with one row in it, say it has the value '1'. And consider you have a simple task like the following:
BEGIN TRANSACTION;
SELECT * FROM T;
WAITFOR DELAY '00:01:00'
SELECT * FROM T;
COMMIT;
That is a simple task that issue two reads from table T, with a delay of 1 minute betwee...
How can I set focus on an element in an HTML form using JavaScript?
...
Do this.
If your element is something like this..
<input type="text" id="mytext"/>
Your script would be
<script>
function setFocusToTextBox(){
document.getElementById("mytext").focus();
}
</script>
...
Stop LastPass filling out a form
...
This should be the valid answer. LP seems to respect this attribute and does not require any crazy "search" names or ids or roles.
– Corneliu
Jul 28 '17 at 1:10
...
Complete Working Sample of the Gmail Three-Fragment Animation Scenario?
...
Uploaded my proposal at github
(Is working with all android versions though view hardware acceleration is strongly recommended for this kind of animations. For non hardware accelerated devices a bitmap caching implementation should fit better)
Demo video with the animation is Here...