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How to check file MIME type with javascript before upload?

I have read this and this questions which seems to suggest that the file MIME type could be checked using javascript on client side. Now, I understand that the real validation still has to be done on server side. I want to perform a client side checking to avoid unnecessary wastage of server res...
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An “and” operator for an “if” statement in Bash

I'm trying to create a simple Bash script to check if the website is down and for some reason the "and" operator doesn't work: ...
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How do I kill background processes / jobs when my shell script exits?

... kill $(jobs -p) doesn't work in dash, because it executes command substitution in a subshell (see Command Substitution in man dash) – user1431317 Jun 15 '17 at 13:37 1...
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How to programmatically set drawableLeft on Android button?

I'm dynamically creating buttons. I styled them using XML first, and I'm trying to take the XML below and make it programattic. ...
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Reduce left and right margins in matplotlib plot

... If you have multiple subplots and want to save each of them, you can use this with fig.savefig() too. (plt.savefig() will not work in that case.) – Abhranil Das Apr 21 '13 at 12:07 ...
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Pickle or json?

...ed to save to disk a little dict object whose keys are of the type str and values are int s and then recover it . Something like this: ...
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Get contentEditable caret index position

...umes: There is always a single text node within the editable <div> and no other nodes The editable div does not have the CSS white-space property set to pre If you need a more general approach that will work content with nested elements, try this answer: https://stackoverflow.com/a/481202...
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Bootstrap carousel multiple frames at once

... Updated 2019... Bootstrap 4 The carousel has changed in 4.x, and the multi-slide animation transitions can be overridden like this... .carousel-inner .carousel-item-right.active, .carousel-inner .carousel-item-next { transform: translateX(33.33%); } .carousel-inner .carousel-item-l...
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Performant Entity Serialization: BSON vs MessagePack (vs JSON)

...n alternative binary serialization format to Google's Protocol Buffers and JSON which also outperforms both. 6 Answer...
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Creating a Pandas DataFrame from a Numpy array: How do I specify the index column and column headers

...g of a list of lists, representing a two-dimensional array with row labels and column names as shown below: 9 Answers ...