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How can I check if a file exists in Perl?
...r something exists at given path using the -e file-test operator.
print "$base_path exists!\n" if -e $base_path;
However, this test is probably broader than you intend. The code above will generate output if a plain file exists at that path, but it will also fire for a directory, a named pipe, a ...
range over interface{} which stores a slice
...nswered Dec 24 '12 at 22:05
masebasemasebase
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java.sql.SQLException: Incorrect string value: '\xF0\x9F\x91\xBD\xF0\x9F…'
...alent to autodetection of the character set.
Adjust your columns and database as well:
var1 varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL
Again, your MySQL version needs to be relatively up-to-date for utf8mb4 support.
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Why use ICollection and not IEnumerable or List on many-many/one-many relationships?
...access to items (which is not usually required, as ordering is done in database).
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How can I use getSystemService in a non-activity class (LocationManager)?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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How can I append a string to an existing field in MySQL?
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How to test if a string is basically an integer in quotes using Ruby
...ll do it the right way. That said, my solution above doesn't deal with non-base-10 integers. So here's the way to do with without resorting to exceptions:
class String
def integer?
[ # In descending order of likeliness:
/^[-+]?[1-9]([0-9]*)?$/, # decima...
How can I pass arguments to a batch file?
...d use a trick like the one of the dots. Remember that, like stated here ss64.com/nt/if.html "You can in fact use almost any character for this a '~' or curly brackets, { } or even the number 4, but square brackets tend to be chosen because they don't have any special meaning."
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No line-break after a hyphen
... to content, when compared to tags.
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How do I write data into CSV format as string (not file)?
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