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What Vim command(s) can be used to quote/unquote words?
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Change single quotes to double quotes
va':s/\%V'\%V/"/g
va' - Visually select the quoted word and the quotes.
:s/ - Start a replacement.
\%V'\%V - Only match single quotes that are within the visually selected region.
/"/g - Replace them all with double quotes.
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Hidden features of Perl?
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One of my favourite features in Perl is using the boolean || operator to select between a set of choices.
$x = $a || $b;
# $x = $a, if $a is true.
# $x = $b, otherwise
This means one can write:
$x = $a || $b || $c || 0;
to take the first true value from $a, $b, and $c, or a default of 0...
Database, Table and Column Naming Conventions? [closed]
...lar "entity names" in queries, that's what I would use table aliases for:
SELECT person.Name
FROM People person
A bit like LINQ's "from person in people select person.Name".
As for 2, 3 and 4, I agree with @Lars.
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Oracle 11.2.0.4 RAC FOR redhat 6.4 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...nolog
SQL> conn / as sysdba
SQL> startup
查看数据库状态
SQL> select open_mode from v$database;
OPEN_MODE
--------------------
READ WRITE
查看数据库字符集
SQL> select userenv('language') from dual;
SQL> select * from props$ where name='NLS_CHARACTERSET';
SQL> select * ...
How to set JVM parameters for Junit Unit Tests?
...agues to set the following:
Windows Preferences / Java / Installed JREs:
Select the proper JRE/JDK (or do it for all of them)
Edit
Default VM arguments: -Xmx1024m
Finish, OK.
After that all test will run with -Xmx1024m but unfortunately you have set it in every Eclipse installation. Maybe you co...
Retrieving the COM class factory for component with CLSID {XXXX} failed due to the following error:
...t X86.
You can also configure the iis options to work with x86 like that
Select Application pool
Select the pool which your app uses
Advanced settings
Enable 32 bit applications true
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i...
Conditional formatting based on another cell's value
...able to do that with scripting. I reckon I've never seen a dynamic mean to select specific colors or an existing format through normal usage. EDIT: to start scripting go to tools > script editor and start coding. But that's a whole new level in using sheets ;-)
– Romain Vinc...
Name of this month (Date.today.month as name)
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HTML Select month with I18n:
<select>
<option value="">Choose month</option>
<%= 1.upto(12).each do |month| %>
<option value="<%= month %>"><%= I18n.t("date.month_names")[month] %&g...
Implementing Comments and Likes in database
...ucture
This pseudocode will get all the comments of photo with ID 5
SELECT * FROM actions
WHERE actions.id_Stuff = 5
AND actions.typeStuff="photo"
AND actions.typeAction = "comment"
This pseudocode will get all the likes or users who liked photo with ID 5
(you may use count() to ...
Why is an int in OCaml only 31 bits?
...space and a number of special objects like true, false, nil, the 127 ASCII characters, some commonly used short strings, the empty list, the empty object, the empty array and so on near the 0 address.
For example, in the MRI, YARV and Rubinius Ruby interpreters, integers are encoded the way I descr...