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How to open files relative to home directory
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The shell (bash, zsh, etc) is responsible for wildcard expansion, so in your first example there's no shell, hence no expansion. Using the tilde to point to $HOME is a mere convention; indeed, if you look at the documentation for File.expand_path,...
Learning Python from Ruby; Differences and Similarities
...you want to allocate some resource (open a file, obtain a database cursor, etc), perform some arbitrary operation on it, and then close it in a safe manner even if an exception occurs.
In Ruby, because blocks are so easy to use (see #9), you would typically code this pattern as a method that takes ...
What is an OS kernel ? How does it differ from an operating system? [closed]
...le users to get something done (i.e compiler, text editor, window manager, etc).
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What is the reason not to use select *?
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If your code depends on the columns being in a specific order, your code will break when there are changes to the table. Also, you may be fetching too much from the table when you select *, especially if there is a binary field in the table.
Just because you are using all the col...
postgresql port confusion 5433 or 5432?
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/etc/services is only advisory, it's a listing of well-known ports. It doesn't mean that anything is actually running on that port or that the named service will run on that port.
In PostgreSQL's case it's typical to use port...
Recover unsaved SQL query scripts
...xecquery
CROSS APPLY sys.dm_exec_sql_text(execquery.sql_handle) AS execsql
ORDER BY execquery.last_execution_time DESC
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Find the most frequent number in a numpy vector
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+1. This is at least an order of magnitude faster than scipy.stats.mode, although less general.
– Fred Foo
Jun 6 '11 at 13:14
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How to use a servlet filter in Java to change an incoming servlet request url?
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@datakey: just either rearrange the ordering or add <dispatcher>FORWARD</dispatcher> to filter mapping.
– BalusC
Jan 17 '14 at 10:23
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How to retrieve the current value of an oracle sequence without increment it?
...t updates to the record, you need to have a way to extract that value.
In order to make sure you get the right one, you might want to wrap the INSERT and RonK's query in a transaction.
RonK's Query:
select MY_SEQ_NAME.currval from DUAL;
In the above scenario, RonK's caveat does not apply since ...
How to get the last char of a string in PHP?
...b, or other whitespace, manually replace the various line endings first:
$order = array("\r\n", "\n", "\r");
$string = str_replace($order, '', $string);
$lastchar = substr($string, -1);
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