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Understanding Fragment's setRetainInstance(boolean)

...you leave the Activity by pressing the back button (thus, calling finish() and effectively destroying the Activity), all of the Activitys attached Fragments will also be destroyed. Why doesn't it work with fragments on the back stack? There are probably multiple reasons why it's not supported,...
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Python Requests library redirect new url

...ight be useful for someone else. If you want to use allow_redirects=False and get directly to the first redirect object, rather than following a chain of them, and you just want to get the redirect location directly out of the 302 response object, then r.url won't work. Instead, it's the "Location...
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How to get the index of a maximum element in a numpy array along one axis

... this works fine for integers but what can I do for float values and the numbers between 0 and 1 – Priyom saha Feb 23 '19 at 8:26 add a comment  |...
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Create Directory if it doesn't exist with Ruby

... system will launch /bin/sh to parse the mkdir -p "foo/bar" string and then the shell will run /bin/mkdir. So you're doing extra work (create the command string, launch /bin/sh to pull it apart again) and some of that extra work leaves you open to shell injection attacks (spend some time in ...
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How to pass parameters to a view

...new MenuView({ collection: itemColl, position: this.getPosition() }) And then, in MenuView, you can use this.options.position. UPDATE: As @mu is too short states, since 1.1.0, Backbone Views no longer automatically attach options passed to the constructor as this.options, but you can do it yo...
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Maintaining the final state at end of a CSS3 animation

...e set to opacity: 0; in the CSS. The animation class is applied onClick, and, using keyframes, it changes the opacity from 0 to 1 (among other things). ...
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How to compare two dates?

... Use the datetime method and the operator < and its kin. >>> from datetime import datetime, timedelta >>> past = datetime.now() - timedelta(days=1) >>> present = datetime.now() >>> past < present True >&g...
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Git Gui: Perpetually getting “This repository currently has approximately 320 loose objects.”

...sible performance issue to you. This should be fixable by running this command from the command line: cd path/to/your/git/repo git gc --aggressive From the output of git help gc: Runs a number of housekeeping tasks within the current repository, such as compressing file revisions (to reduce disk s...
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“Header Search Paths” vs. “User Header Search Paths” in Xcode?

...he User Header Search Paths for paths you want searched for #include "..." and use the Header Search Paths for #include <...>. Of course, if you check the option to Always Search User Paths, then #include <...> will also work for the user paths. ...
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Set width of TextView in terms of characters

... Answering my own question... And the winner is: set the minEms attribute (android:minEms) !!! So "ems" it turns out refers to the size of the widest character, typically an "M", get it? So setting minEms to an integer value say 3, on an EditText or Text...