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MongoDB: Find a document by non-existence of a field?
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+1. However, keep in mind that such queries can't use indexing and might be very slow on large collections.
– mnemosyn
Dec 19 '11 at 21:12
10
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.append(), prepend(), .after() and .before()
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See:
.append() puts data inside an element at last index and
.prepend() puts the prepending elem at first index
suppose:
<div class='a'> //<---you want div c to append in this
<div class='b'>b</div>
</div>
when .append() executes it will look li...
Maximum Year in Expiry Date of Credit Card
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<?php
$y = gmdate("Y");
$x = 20;
$max = ($y + $x);
while ($y <= $max) {
echo "<option value='$y'>$y</option>";
$y = $y + 1;
}
?>
sh...
Converting newline formatting from Mac to Windows
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"hints.macworld.com/article.php?story=20031018164326986" also has a good write-up on how to use the tr command to perform various conversions. Use hexdump or similar to find out exactly what sort of end-of-line convention is now used in the file.
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Why can I throw null in Java? [duplicate]
...llPointerException and not a FileNotFoundException
– php_coder_3809625
Aug 24 '16 at 5:50
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Read a file in Node.js
...y.', error);
process.exit(1);
}
files.forEach((file: any, index: any) => {
if (file.endsWith('.ts')) {
//set the path and read the webpack.config.js file as text, replace path
let config = fs.readFileSync('myFile.js', 'utf8');
let fileN...
How do you delete a column by name in data.table?
... tried grepl() initally and it didn't work, as data.table columns can't be indexed by a logical vector. But I now realize that grepl() can be made to work by wrapping it with which(), so that it returns an integer vector.
– Josh O'Brien
Feb 8 '12 at 23:38
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embedding image in html email
...ere for simple example: oracle-base.com/articles/misc/EmailFromOraclePLSQL.php Note that this link does not show embedded images approach, but has detail to get you going.
– tbone
Mar 9 '12 at 15:19
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scp or sftp copy multiple files with single command
...edu:/some/remote/directory/
Source: http://www.hypexr.org/linux_scp_help.php
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How to decide when to use Node.js?
...lot about how good Node.js is. Considering how much I love working with jQuery and JavaScript in general, I can't help but wonder how to decide when to use Node.js. The web application I have in mind is something like Bitly - takes some content, archives it.
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