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How can I install a local gem?
If I download a .gem file to a folder in my computer, can I install it later using gem install ?
9 Answers
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Fast ceiling of an integer division in C / C++
...x + y - 1) / y;
or (avoiding overflow in x+y)
q = 1 + ((x - 1) / y); // if x != 0
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How to remove focus around buttons on click
...d overriding the button focus style worked for me. This problem may be specific to MacOS with Chrome.
.btn:focus {
outline: none;
box-shadow: none;
}
Note though that this has implications for accessibility and isn't advised until you have a good consistent focus state for your buttons and in...
How to change the Eclipse default workspace?
...
If you mean "change workspace" go to File -> Switch Workspace
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What is the behavior of integer division?
...perator is the algebraic quotient with any
fractional part discarded.88) If the quotient a/b is representable, the expression
(a/b)*b + a%b shall equal a.
and the corresponding footnote:
88) This is often called ‘‘truncation toward zero’’.
Of course two points to note are:
3 ...
How can I convert ereg expressions to preg in PHP?
...str);
preg_match('(^hello)', $str);
preg_match('{^hello}', $str);
// etc
If your delimiter is found in the regular expression, you have to escape it:
ereg('^/hello', $str);
preg_match('/^\/hello/', $str);
You can easily escape all delimiters and reserved characters in a string by using preg_quo...
Set encoding and fileencoding to utf-8 in Vim
What is the difference between these two commands?
3 Answers
3
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Remove a fixed prefix/suffix from a string in Bash
... There are also ## and %% , which remove as much as possible if $prefix or $suffix contain wildcards.
– pts
May 18 '13 at 11:48
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PG undefinedtable error relation users does not exist
...migrations. It will only use the
contents of the current schema.rb file. If a migration can't be rolled back,
rake db:reset may not help you. To find out more about dumping the schema see
Schema Dumping and You section. Rails Docs
If the trick doesn't help, drop the database, then re-create ...
What is a database transaction?
... than possible) explanation of a transaction as applied to computing (even if copied from Wikipedia)?
11 Answers
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