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When to use extern in C++
I'm reading "Think in C++" and it just introduced the extern declaration. For example:
4 Answers
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How do I use Ruby for shell scripting?
...of directory, including current dir.
#=> array of relative names
File.expand_path('~/file.txt') #=> "/User/mat/file.txt"
File.dirname('dir/file.txt') #=> 'dir'
File.basename('dir/file.txt') #=> 'file.txt'
File.join('a', 'bunch', 'of', 'strings') #=> 'a/bunch/of/strings'
__FILE__ #=&...
Timeout command on Mac OS X?
Is there an alternative for the timeout command on Mac OSx. The basic requirement is I am able to run a command for a specified amount of time.
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Passing a string with spaces as a function argument in bash
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Can you explain why one needs quotes? I tried both with and without, and it did not work for me. I'm using Ubuntu 14.04, GNU bash, version 4.3.11(1)-release (x86_64-pc-linux-gnu). What does work for me is using $@ (with or without quo...
How to round an image with Glide library?
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Glide V4:
Glide.with(context)
.load(url)
.circleCrop()
.into(imageView);
Glide V3:
You can use RoundedBitmapDrawable for circular images with Glide. No custom ImageView is required.
Glide.with(context).load(url).asBitmap()...
Making TextView scrollable on Android
I am displaying text in a textview that appears to be too long to fit
into one screen. I need to make my TextView scrollable. How can I do
that?
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How do I search for an object by its ObjectId in the mongo console?
...re the collection name is correct (case matters) and that the ObjectId is exact.
Documentation is here
> db.test.insert({x: 1})
> db.test.find() // no criteria
{ "_id" : ObjectId("4ecc05e55dd98a436ddcc47c"), "x" : 1 }
> db.test.find({"...
SQL how to increase or decrease one for a int column in one command
...umn by one. Is there a way to do this in one action or we have to get the existing value and then add or minus one on top of it?
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Is it possible to break a long line to multiple lines in Python [duplicate]
... inside parentheses, brackets and braces. If necessary, you
can add an extra pair of parentheses around an expression, but sometimes
using a backslash looks better. Make sure to indent the continued line
appropriately.
Example of implicit line continuation:
a = some_function(
'1' + ...
Swift class introspection & generics
...RROR :(
let my_obj = MyClassRef()
Hmm… the error says:
Playground execution failed: error: :16:1: error: constructing an object of class type 'X' with a metatype value requires an '@required' initializer
Y().me()
^
<REPL>:3:7: note: selected implicit initializer with type '()'
cla...