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Find MongoDB records where array field is not empty
...h an empty list, and 5 docs with a non-empty list.
for (var i = 0; i < 1000; i++) { db.doc.insert({}); }
for (var i = 0; i < 1000; i++) { db.doc.insert({ nums: [] }); }
for (var i = 0; i < 5; i++) { db.doc.insert({ nums: [1, 2, 3] }); }
db.doc.createIndex({ nums: 1 });
I recognize this i...
conversion from string to json object android
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edited Mar 13 '14 at 10:42
Saro Taşciyan
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a...
Are GUID collisions possible?
... info.
– Greg Beech
Oct 8 '08 at 23:10
100
Down vote because, in principle (in it's rawest form),...
How can I get the SQL of a PreparedStatement?
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Matthias Braun
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answered Mar 4 '10 at 20:41
Pascal MARTINPascal MARTIN
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What are the differences between .so and .dylib on osx?
...loaded.
Historically, the differences were more significant. In Mac OS X 10.0, there was no way to dynamically load libraries. A set of dyld APIs (e.g. NSCreateObjectFileImageFromFile, NSLinkModule) were introduced with 10.1 to load and unload bundles, but they didn't work for dylibs. A dlopen c...
demystify Flask app.secret_key
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106
Anything that requires encryption (for safe-keeping against tampering by attackers) requires t...
What are carriage return, linefeed, and form feed?
... This is commonly escaped as \n, abbreviated LF or NL, and has ASCII value 10 or 0x0A. CRLF (but not CRNL) is used for the pair \r\n.
Form feed means advance downward to the next "page". It was commonly used as page separators, but now is also used as section separators. (It's uncommonly used in s...
Discard Git Stash Pop
...owLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\...
ItemsControl with horizontal orientation
...y/…
– Kent Boogaart
Jun 27 '09 at 10:10
3
Answer also holds for Silverlight
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Is it a bad practice to catch Throwable?
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104
You need to be as specific as possible. Otherwise unforeseen bugs might creep away this way.
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