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What is the difference between 'my' and 'our' in Perl?
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separate from any package, so that the variable cannot be accessed in the form of $package_name::variable.
On the other hand, our variables are package variables, and thus automatically:
global variables
definitely not private
not necessarily new
can be accessed outside the package (or lexica...
How to colorize diff on the command line?
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Indeed. In Zsh, a command of the form =(...) is replaced with the name of a file containing its output.
– Johnsyweb
May 5 '15 at 23:07
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MySQLDump one INSERT statement for each data row
...eral default settings. See the discussion of mysqldump option groups for information about selectively enabling or disabling a subset of the options affected by --opt.
--skip-extended-insert
Turn off extended-insert
sh...
Change date format in a Java string
...:00:00.0";
LocalDateTime datetime = LocalDateTime.parse(oldstring, DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.S"));
Use LocalDateTime#format() (or ZonedDateTime#format()) to format a LocalDateTime into a String in a certain pattern.
String newstring = datetime.format(DateTimeFormatter.ofPat...
Why is it Valid to Concatenate Null Strings but not to Call “null.ToString()”?
...ng, but it does not convert the value of the original null string.
More information on the + binary operator:
The binary + operator performs string concatenation when one or both operands are of type string.
If an operand of string concatenation is null, an empty string is substituted. Otherwise, ...
How to use greater than operator with date?
... It bears noting that MySQL seems a bit picky about the date format; while either 2019/02/08 21:04:07 or 2019-02-08 21:04:07 produces the expected outcome, 02-08-2019 21:04:07, using the US date format, casts a much wider net.
– David A. Gray
Feb ...
Java “params” in method signature?
...xchange.using('gps', function() { StackExchange.gps.track('embedded_signup_form.view', { location: 'question_page' }); });
$window.unbind('scroll', onScroll);
}
};
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Is “for(;;)” faster than “while (TRUE)”? If not, why do people use it?
...ot faster.
If you really care, compile with assembler output for your platform and look to see.
It doesn't matter. This never matters. Write your infinite loops however you like.
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MySQL Select all columns from one table and some from another table
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I need more information really but it will be along the lines of..
SELECT table1.*, table2.col1, table2.col3 FROM table1 JOIN table2 USING(id)
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What does the exclamation mark do before the function?
...gly concatenated with a file that doesn't end with a ;. If you have the () form, it would consider it a function call of whatever was defined in the previous file. Tip of the hat to a co-worker of mine.
– Jure Triglav
Nov 13 '12 at 20:31
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