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install / uninstall APKs programmatically (PackageManager vs Intents)
...k of what applications it has installed. Of course, this could be achieved by simply keeping a list of installed applications. But this should not be necessary! It should be the responsibility of the PackageManager to maintain the installedBy(a, b) relationship. In fact, according to the API it is:
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Specify pane percentage in tmuxinator project
...it should be made clear in the answer that the same number of panes listed by the list-panes command should be specified under the panes: section. For example, if 6 panes are defined 6 lines should appear under panes:, even if they only contain a - (saying do nothing in this pane). If not the window...
How to create and write to a txt file using VBA
...nnel method? I'd like some reasons to tell my students with info backed up by other experience.
– Rick Henderson
Jun 7 '16 at 16:40
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Rails: where does the infamous “current_user” come from?
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It is defined by several gems, e.g. Devise
You'll need to store the user_id somewhere, usually in the session after logging in. It also assumes your app has and needs users, authentication, etc.
Typically, it's something like:
class App...
Outputting data from unit test in python
... The docs hint at this but it's worth mentioning explicitly: by default, if msg is used, it will replace the normal error message. To get msg appended to the normal error message, you also need to set TestCase.longMessage to True
– Catalin Iacob
O...
Understanding the basics of Git and GitHub [closed]
...GitHub is a website on which there are source code repositories manageable by Git. Thus, GitHub is completely unrelated to the original Git tool.
Is git saving every repository locally (in the user's machine) and in GitHub?
If you commit changes, it stores locally. Then, if you push the commits...
Regex Pattern to Match, Excluding when… / Except between
...ork in two steps. A first regex neutralizes the context you want to ignore by replacing potentially conflicting strings. If you only want to match, then you can replace with an empty string, then run your match in the second step. If you want to replace, you can first replace the strings to be ignor...
Convert PHP closing tag into comment
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Fix using character classes
To fix line comments, you can break up ?> by putting > inside a character class like so:
$string = preg_replace('#<br\s*/?[>](?:\s*<br\s*/?[>])+#i', '<br />', $string);
^ ^ ^ ^
To fix block comment...
mongo group query how to keep fields
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This does not work, it groups by the other fields which is undesired.
– Jack Cole
Aug 2 '18 at 17:24
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Difference between Big-O and Little-O Notation
...etting the stage.)
[stuff you know]A common way to classify algorithms is by runtime, and by citing the big-Oh complexity of an algorithm, you can get a pretty good estimation of which one is "better" -- whichever has the "smallest" function in the O! Even in the real world, O(N) is "better" than O...