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Preview an image before it is uploaded
...S implementation of this. Works like a charm. @kxc you should make an ajax call and send input.files[0] as data, see jQuery's doc.
– Sumi Straessle
Mar 13 '17 at 9:07
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Is there a simple, elegant way to define singletons? [duplicate]
...l interface. In order to ensure you fully clean up after logging you must call logging.shutdown(). This means you must import logging into the module which calls shutdown. If it was a singleton pattern it is possible to call shutdown on the instance in any module to which it is passed.
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Remove by _id in MongoDB console
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If the _id field is not automatically generated (i.e. it is not an ObjectId, but a String), You can just write the value of the _id under quotation marks: db.your.database.remove({"_id": "your value"}).
– Aleksandar
Ju...
Passing route control with optional parameter after root in express?
... link: null
});
}
});
});
There's no problem in calling next() inside the callback.
According to this, handlers are invoked in the order that they are added, so as long as your next route is app.get('/', ...) it will be called if there is no key.
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what is difference between success and .done() method of $.ajax
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In short, decoupling success callback function from the ajax function so later you can add your own handlers without modifying the original code (observer pattern).
Please find more detailed information from here: https://stackoverflow.com/a/14754681/1...
Objective-C pass block as parameter
...claration style does not make it clear and easy to write the actual method call with a real block argument.
– uchuugaka
Feb 18 '13 at 22:56
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Best practice: AsyncTask during orientation change
...problem of retaining an AsyncTask across a rotation change nicely. You basically need to host your AsyncTask inside a Fragment, call setRetainInstance(true) on the Fragment, and report the AsyncTask's progress/results back to it's Activity through the retained Fragment.
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overlay two images in android to set an imageview
... XML then simply set the image, or you can configure a LayerDrawable dynamically in code.
Solution #1 (via XML):
Create a new Drawable XML file, let's call it layer.xml:
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/t" />...
How to read contacts on Android 2.0
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How would you get the contact photo? Ive seen many so-called solutions on SO, but they are largely unreliable...
– user868935
Jun 24 '12 at 19:01
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Check if EditText is empty. [closed]
...t that you had five. You could make a function that did the same thing and call it five times - or you could loop over the five EditText's.
– cvaldemar
Jun 9 '11 at 9:24
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