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Is the primary key automatically indexed in MySQL?
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I guess this is the answer
mysql> create table test(id int primary key, s varchar(20));
Query OK, 0 rows affected (0.06 sec)
mysql> show indexes from test \G
*************************** 1. row ***************************
Table: test
Non_unique: 0
Key_name: ...
How to turn IDENTITY_INSERT on and off using SQL Server 2008?
Why am I getting an error doing an insert when IDENTITY_INSERT is set to OFF?
8 Answers
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How can I bind to the change event of a textarea in jQuery?
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Try this actually:
$('#textareaID').bind('input propertychange', function() {
$("#yourBtnID").hide();
if(this.value.length){
$("#yourBtnID").show();
}
});
DEMO
That works for any changes you make, typing, cutting, pasting.
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How to create index on JSON field in Postgres?
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Found:
CREATE TABLE publishers(id INT, info JSON);
CREATE INDEX ON publishers((info->>'name'));
As stated in the comments, the subtle difference here is ->> instead of ->. The former one returns the value as text, the latter as a JSON obj...
Is there a way to make text unselectable on an HTML page? [duplicate]
... to be unselectable. You can set this using an attribute in HTML:
<div id="foo" unselectable="on" class="unselectable">...</div>
Sadly this property isn't inherited, meaning you have to put an attribute in the start tag of every element inside the <div>. If this is a problem, yo...
demystify Flask app.secret_key
...ns section in the Quickstart has good, sane advice on what kind of server-side secret you should set.
Encryption relies on secrets; if you didn't set a server-side secret for the encryption to use, everyone would be able to break your encryption; it's like the password to your computer. The secret ...
How to prevent line break at hyphens on all browsers
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I’m afraid there’s no simpler way to do it reliably than splitting the text to “words” (sequences of non-whitespace characters separated by whitespace) and wrapping each “word” that contains a hyphen inside nobr markup. So ...
Get a list of checked checkboxes in a div using jQuery
... get a list of names of checkboxes that are selected in a div with certain id. How would I do that using jQuery?
8 Answers
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How to force Selenium WebDriver to click on element which is not currently visible?
...s to your element, make sure you look at computed style):
visibility != hidden
display != none (is also checked against every parent element)
opacity != 0 (this is not checked for clicking an element)
height and width are both > 0
for an input, the attribute type != hidden
Your element is ma...
Semantic-ui vs Bootstrap [closed]
Which is the best one to use and if possible, please provide the difference(s) and advantages of these two.
3 Answers
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