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How to check programmatically if an application is installed or not in Android?
...Installed(context, "com.whatsapp");
This answer shows how to get the app from the Play Store if the app is missing, though care needs to be taken on devices that don't have the Play Store.
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Create an Array of Arraylists
... has. You should only declare as ArrayList if you need something specific from its API to be available via the reference.
– cellepo
Mar 22 '16 at 21:22
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Can I get CONST's defined on a PHP class?
...ably this acts on the single file only, and does not inherit any constants from parent classes. In fact, this technique does not even care about the class - it will give you all constants in the file, even in the global scope. It's a great tool to explore though.
– Jason
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In Bash, how do I add a string after each line in a file?
... which prints 2 lines even though input is 1 line foo bar (and cat reading from stdin instead of a file makes no difference for this).
– hyde
Nov 26 '13 at 11:18
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How to list npm user-installed packages?
...sions is plural. This will give you the full listing of versions to choose from.
For latest remote version:
npm view <module_name> version
Note, version is singular.
To find out which packages need to be updated, you can use
npm outdated -g --depth=0
To update global packages, you c...
Rename multiple files based on pattern in Unix
...use this monster.
Some of those are a bit convoluted and the list is far from complete, but you will find what you want here for pretty much all unix systems.
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Why can't I reference my class library?
... Studio) - because of a migration project this makes (some) sense; MSBuild from the command line gave us a single not so helpful clue which left us wondering for a while: The type or namespace name 'A' does not exist in the namespace 'B'. Note that no warnings come up for this...
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Create a string with n characters
...JVMs may assign it as an intrinsic function. Rolling your own cuts you off from all this performance goodness...
– SusanW
Aug 5 '16 at 12:26
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Converting java.util.Properties to HashMap
...very unlikely to happen, as long as you don't use the mutable call methods from the super Hashtable<Object,Object> of Properties.
So, if don't do nasty things with your Properties instance this is the way to go.
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Difference between := and = operators in Go
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from the reference doc : (tour.golang.org)
Inside a function, the := short assignment statement can be used in place of a var declaration with implicit type.
Outside a function, every construct begins with a keyword (var, ...