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Check if element exists in jQuery [duplicate]
..."Vanilla JS" is exactly the same as base Javascript anyway (the downloaded file is always empty) - someone just decided to make a sales pitch for base Javascript.
– Brilliand
Jan 6 '14 at 17:59
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How to normalize a NumPy array to within a certain range?
...t needs to be normalized within a range before it can be written back to a file. This can be done like so:
7 Answers
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how to check if a form is valid programmatically using jQuery Validation Plugin
...ou are receiving a TypeError valid() not a function add the plugin to your file since its a plugin not included in jquery library eg. <script src="https://cdn.jsdelivr.net/jquery.validation/1.16.0/jquery.validate.min.js"></script>
– StackEdd
Jan 15 ...
Can Python test the membership of multiple values in a list?
...b']} <= {'a', ['b'], 'foo', 'bar'}
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: unhashable type: 'list'
Sets can only be created with hashable elements. But the generator expression all(x in container for x in items) can handle almost any conta...
What's the fastest way to do a bulk insert into Postgres?
...ate table tmp AS select * from target where 1=0), and start by reading the file into the temp table.
Then I check what can be checked: duplicates, keys that already exist in the target, etc.
Then I just do a "do insert into target select * from tmp" or similar.
If this fails, or takes too long, I ...
Conditional import of modules in Python
...a strong guarantee that certain interfaces/features will be there: e.g. a 'file' called /dev/ttyX. In your case: dealing with JSON, there's nothing that is actually OS-specific and you are only checking if the package exists or not. In that case, just try to import it, and fall-back with an except i...
JavaScript: Get image dimensions
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if you have image file from your input form.
you can use like this
let images = new Image();
images.onload = () => {
console.log("Image Size", images.width, images.height)
}
images.onerror = () => result(true);
let fileReader = new Fi...
How do you set the max number of characters for an EditText in Android?
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@NiteshVerma in your res/layout xml file put next '<LinearLayout.... <EditText android:maxLength="20"'
– Shell Scott
Sep 19 '15 at 23:13
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Can I multiply strings in Java to repeat sequences? [duplicate]
...sn't using maven - I guess I'd have to create a custom location for my jar files ... similar to a maven repository! And then include those jar files on my classpath and do all kinds of work I like to avoid. If the poster really wants to hack java, then she or he needs to use maven or its equivalent....
How to quit scala 2.11.0 REPL?
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Use the end of file characters. Ctrl-D on linux, Ctrl-Z on Windows.
Using the :help command on my 2.10.3 REPL gets me this hint:
:quit exit the interpreter
I don't know whether :quit is still there in 2.11.0 or not though.
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