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How do I determine whether an array contains a particular value in Java?
...[]>', and not a 'list<int>'. It just contains one single element. Meaning the Contains doesn't work since it just has one element; the int array.
– Nyerguds
Nov 13 '10 at 13:15
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What is cardinality in MySQL?
...avigating less branches to get data.
Therefore higher cordinality values mean:
better performance of read-queries;
bigger database size;
worse performance of write-queries, because hidden index data is being updated.
sh...
“Keep Me Logged In” - the best approach
...ll, let's do some math here. We're generating a 128 bit random token. That means that there are:
possibilities = 2^128
possibilities = 3.4 * 10^38
Now, to show how absurdly large that number is, let's imagine every server on the internet (let's say 50,000,000 today) trying to brute-force that num...
mongodb/mongoose findMany - find all documents with IDs listed in array
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The find function in mongoose is a full query to mongoDB. This means you can use the handy mongoDB $in clause, which works just like the SQL version of the same.
model.find({
'_id': { $in: [
mongoose.Types.ObjectId('4ed3ede8844f0f351100000c'),
mongoose.Types.ObjectId...
Python str vs unicode types
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unicode is meant to handle text. Text is a sequence of code points which may be bigger than a single byte. Text can be encoded in a specific encoding to represent the text as raw bytes(e.g. utf-8, latin-1...).
Note that unicode is not ...
efficient way to implement paging
...will be using exclusively the index to create the data access window; this means, if you need some filtering, the filtering should be (or must be) in the Entity listing (where the row is created) and some indexes should be created as well to keep up the good performance.
Now, whats better?
If you ...
In PHP what does it mean by a function being binary-safe?
In PHP what does it mean by a function being binary-safe ?
3 Answers
3
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How can I create a copy of an object in Python?
...lds of the new object, the old object should not be affected by that.
You mean a mutable object then.
In Python 3, lists get a copy method (in 2, you'd use a slice to make a copy):
>>> a_list = list('abc')
>>> a_copy_of_a_list = a_list.copy()
>>> a_copy_of_a_list is a_lis...
Is it possible to set the stacking order of pseudo-elements below their parent element? [duplicate]
...
I am not sure what you mean by #parent and #pseudo-parent, do you mind to show me a jsFiddle? or any example, thanks anyway.
– adardesign
Jan 31 '12 at 14:49
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switch() statement usage
...erhead of switch vs if
test1 <- function(type) {
switch(type,
mean = 1,
median = 2,
trimmed = 3)
}
test2 <- function(type) {
if (type == "mean") 1
else if (type == "median") 2
else if (type == "trimmed") 3
}
system.time( for(i in 1:1e6) test1('mean') ) # 0.89 sec...