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How to use PyCharm to debug Scrapy projects
... 'exceptions.SyntaxError'>, SyntaxError("Non-ASCII character '\\xf3' in file /Library/python/2.7/site-packages/scrapy/cmdline.pyc on line 1, but no encoding declared;
– Aymon Fournier
Dec 6 '14 at 3:40
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How dangerous is it to access an array out of bounds?
...d, I've seen lots of weird things happen on computers I've used (corrupted files, unrecoverable system errors, etc.), and I have no idea how many of them might have been caused by some C program exhibiting the dreaded undefined behavior. (So far no actual demons have flown out of my nose.)
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How to call a PHP function on the click of a button
...nction( msg ) {
alert( "Data Saved: " + msg );
});
});
In your PHP file:
<?php
function abc($name){
// Your code here
}
?>
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When to use the different log levels
...o the operation, but not the service or application (can't open a required file, missing data, etc.). These errors will force user (administrator, or direct user) intervention. These are usually reserved (in my apps) for incorrect connection strings, missing services, etc.
Fatal - Any error that i...
How to find out which fonts are referenced and which are embedded in a PDF document
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In evince document viewer, go to File --> properties --> Fonts tab
– Lnux
Dec 17 '16 at 5:53
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How to make my font bold using css?
...mples on how to use CSS together with html. You can simply put them into a file, save it and open it up with the browser of your choice:
This one directly embeds your CSS style into your tags/elements. Generally this is not a very nice approach, because you should always separate the content/html f...
Execute SQLite script
...n.db < create.sql
SQLite's version of SQL doesn't understand < for files, your shell does.
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Swift: #warning equivalent
...}"
find "${SRCROOT}" \( -name "*.swift" \) -print0 | xargs -0 egrep --with-filename --line-number --only-matching "($TAGS).*\$" | perl -p -e "s/($TAGS)/ warning: \$1/"
This will force Xcode to flag a warning at compile time for any // TODO: or // FIXME: comments you markup.
Alternatively, you cou...
Are PHP functions case sensitive?
...>
string(3) "foo"
}
Problem is using autoloaders and case-sensitive file-systems (like ext2/3/4), in that you must call the class name with the same case the file containing the class is named (not how the class name is actually cased), or use strtolower:
The class file:
<?php
// filenam...
Remove carriage return in Unix
What is the simplest way to remove all the carriage returns \r from a file in Unix?
20 Answers
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