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How can I check if a file exists in Perl?
...mething 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 syml...
How to take screenshot of a div with JavaScript?
...
When the quiz is finished, do this:
var c = document.getElementById('the_canvas_element_id');
var t = c.getContext('2d');
/* then use the canvas 2D drawing functions to add text, etc. for the result */
When the user clicks "Capture", do this:
window.open('', document.getElementById('the_canvas...
Queries vs. Filters
... query
Query hello sam (using keyword must)
curl localhost:9200/myindex/_search?pretty -d '
{
"query": { "bool": { "must": { "match": { "msg": "hello sam" }}}}
}'
Document "Hello world! I am Sam." is assigned a higher score than "Hello world!", because the former matches both words in the qu...
Transpose a data frame
...000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 4...
How to create a .NET DateTime from ISO 8601 format
... Z actually stands for Zulu time or UTC. en.wikipedia.org/wiki/ISO_8601#UTC
– Peter Stephens
Jun 22 '11 at 19:22
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Can I pass an array as arguments to a method with variable arguments in Java?
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answered May 28 '10 at 4:32
polygenelubricantspolygenelubricants
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How to profile methods in Scala?
...you can automatically wrap things in the REPL
– oxbow_lakes
Feb 6 '12 at 12:43
1
Almost perfect, ...
Why split the tag when writing it with document.write()?
...ecx.images-amazon.com/images/G/01/javascripts/lib/jquery/jquery-1.2.6.pack._V265113567_.js"></script>');
}
// -->
</script>
...but to be honest, using document.write is not something I would consider best practice. Why not manipulating the DOM directly?
<script type="...
How to determine the Boost version on a system?
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Boost Informational Macros. You need: BOOST_VERSION
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How to use enums as flags in C++?
...ry 1000
};
It can hold values up to an int so that is, most of the time, 32 flags which is clearly reflected in the shift amount.
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