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Rake just one migration
... To expand on what Ryan says, if the table has been dropped from the database outside of Rails, rake db:migrate:up VERSION=my_version may do nothing, because the schema_migrations table still says it is has been run. In the same situation rake db:migrate:redo VERSION=my_version may fa...
How to verify if a file exists in a batch file?
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Just something to note from the IF /? help file: The ELSE clause must occur on the same line as the command after the IF. This burned me. hope it helps you.
– funkymushroom
Feb 27 '14 at 17:58
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Difference between e.target and e.currentTarget
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comment from @poke above is the best answer "currentTarget is always the object listening, target is the actual target that received the event"
– PandaWood
Apr 1 '16 at 6:21
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The character encoding of the HTML document was not declared
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You have to change the file from .html to .php.
and add this following line
header('Content-Type: text/html; charset=utf-8');
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How can I access getSupportFragmentManager() in a fragment?
... fragManager = myContext.getSupportFragmentManager(); //If using fragments from support v4
or
FragmentManager fragManager = myContext.getFragmentManager();
You are done.
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Press alt + numeric in bash and you get (arg [numeric]) what is that?
...for is:
"readline arguments"
This will lead to, for example, this chapter from the bash reference manual:
You can pass numeric arguments to Readline commands. Sometimes the argument acts as a repeat count, other times it is the sign of the argument that is significant. If you pass a negative argum...
Responsive css background images
...based on a browser window size. (2) Elements like div get their own height from their own content, or take available space in a flexbox model. Saying that without explicit width/height the container won't show at all is incorrect. Obviously, if you want to display an empty div with a background imag...
Installing rmagick on Ubuntu
...4. Looked here but had no joy. I even compiled and installed ImageMagick from source, but the instructions here still didn't help me when I try to install RMagick using RubyGems. I got this error:
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Binding a list in @RequestParam
I'm sending some parameters from a form in this way:
7 Answers
7
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Why use non-member begin and end functions in C++11?
...cialArray::valueAt(int);
to iterate over it's values you need to inherit from this class and define begin() and end() methods for cases when
auto i = v.begin();
auto e = v.end();
But if you always use
auto i = begin(v);
auto e = end(v);
you can do this:
template <>
SpecialArrayItera...