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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__ #=&...
Group by with multiple columns using lambda
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var query = source.GroupBy(x => new { x.Column1, x.Column2 });
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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()...
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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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({"...
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' + ...
如何选择机器学习算法 - 大数据 & AI - 清泛网 - 专注IT技能提升
...不同的参数），最后选择在交叉验证中表现最好的。jmp0xf 译自Edwin Chen
How do you know what machine learning algorithm to choose for your classification problem? Of course, if you really care about accuracy, your best bet is to test out a couple different ones (making sure t...