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Does MongoDB's $in clause guarantee order
...r documents with an array that is going to be passed in to the $in as [ 4, 2, 8 ].
Approach using Aggregate
var list = [ 4, 2, 8 ];
db.collection.aggregate([
// Match the selected documents by "_id"
{ "$match": {
"_id": { "$in": [ 4, 2, 8 ] },
},
// Project a "weight...
Does Java support default parameter values?
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24 Answers
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How to convert all text to lowercase in Vim
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124
If you really mean small caps, then no, that is not possible – just as it isn’t possible t...
Java: is there a map function?
...DK as of java 6.
Guava has a Function interface though and the
Collections2.transform(Collection<E>, Function<E,E2>)
method provides the functionality you require.
Example:
// example, converts a collection of integers to their
// hexadecimal string representations
final Collection<...
How do I split a string with multiple separators in javascript?
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22 Answers
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Use of .apply() with 'new' operator. Is this possible?
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Minimal web server using netcat
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Try this:
while true ; do nc -l -p 1500 -c 'echo -e "HTTP/1.1 200 OK\n\n $(date)"'; done
The -cmakes netcat execute the given command in a shell, so you can use echo. If you don't need echo, use -e. For further information on this, try man nc. Note, that when using echo there is no wa...
How do I create a variable number of variables?
...ionaries are stores of keys and values.
>>> dct = {'x': 1, 'y': 2, 'z': 3}
>>> dct
{'y': 2, 'x': 1, 'z': 3}
>>> dct["y"]
2
You can use variable key names to achieve the effect of variable variables without the security risk.
>>> x = "spam"
>>> z = {x...
Javascript - sort array based on another array
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