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Cannot change column used in a foreign key constraint
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The type and definition of foreign key field and reference must be equal.
This means your foreign key disallows changing the type of your field.
One solution would be this:
LOCK TABLES
favorite_food WRITE,
person WRITE;
ALTER TABLE...
How to send a JSON object using html form data
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Get complete form data as array and json stringify it.
var formData = JSON.stringify($("#myForm").serializeArray());
You can use it later in ajax. Or if you are not using ajax; put it in hidden textarea and pass to server. If this data is passed as json string via normal f...
Print content of JavaScript object? [duplicate]
Typically if we just use alert(object); it will show as [object Object] . How to print all the content parameters of an object in JavaScript?
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How to get JQuery.trigger('click'); to initiate a mouse click
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edited May 23 '17 at 11:47
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answered Jan 5 '14 at 1...
Regex for string contains?
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Assuming regular PCRE-style regex flavors:
If you want to check for it as a single, full word, it's \bTest\b, with appropriate flags for case insensitivity if desired and delimiters for your programming language. \b represents a "word boundary", that is, a point between characters where a wor...
Clear file cache to repeat performance testing
... to prevent my performance results from being skewed? I believe I need to either completely clear, or selectively remove cached information about file and directory contents.
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Get number of digits with JavaScript
As the title of my post suggests, I would like to know how many digits var number has. For example: If number = 15; my function should return 2 . Currently, it looks like this:
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How can I read inputs as numbers?
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TLDR
Python 3 doesn't evaluate the data received with input function, but Python 2's input function does (read the next section to understand the implication).
Python 2's equivalent of Python 3's input is the raw_input function.
Python 2.x
There were two functions to get ...
Convert string in base64 to image and save on filesystem in Python
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Starting with
img_data = b'iVBORw0KGgoAAAANSUhEUgAABoIAAAaCCAYAAAABZu+EAAAqOElEQVR42uzBAQEAAACAkP6v7ggK\nAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\nAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...
Differences in auto-unboxing between Java 6 vs Java 7
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It looks like the language in section 5.5 Casting Conversion of Java 7 JLS was updated in comparison to the same section in the Java 5/6 JLS, probably to clarify the allowed conversions.
Java 7 JLS says
An expression of ...