大约有 40,000 项符合查询结果（耗时：0.0226秒） [XML]
Cron jobs and random times, within given hours
...ng 7 script executions in there by adding another line with another 7-hour range. Or relax your restriction to run between 3am and 11pm.
share
|
improve this answer
|
follow
...
Which MySQL data type to use for storing boolean values
... bit-field
values. A type of BIT(M) enables storage of M-bit values. M can range
from 1 to 64.
Otherwise, according to the MySQL manual you can use BOOL or BOOLEAN, which are at the moment aliases of tinyint(1):
Bool, Boolean: These types are synonyms for TINYINT(1). A value of
zero is considered ...
Set a default font for whole iOS app?
...turn self.font.fontName }
set {
if self.font.fontName.range(of:"Medium") == nil {
self.font = UIFont(name: newValue, size: self.font.pointSize)
}
}
}
@objc var substituteFontNameBold : String {
get { return self.font.fontName...
Split a List into smaller lists of N size
... i < locations.Count; i += nSize)
{
list.Add(locations.GetRange(i, Math.Min(nSize, locations.Count - i)));
}
return list;
}
Generic version:
public static IEnumerable<List<T>> SplitList<T>(List<T> locations, int nSize=30)
{
for (...
B-Tree vs Hash Table
...than with a tree algorithm (O(1) instead of log(n)), but you cannot select ranges (everything in between x and y).
Tree algorithms support this in Log(n) whereas hash indexes can result in a full table scan O(n).
Also the constant overhead of hash indexes is usually bigger (which is no factor in the...
What is a “context bound” in Scala?
... which forms an array from the results of applying
a given function f on a range of numbers from 0 until a given length. Up to Scala 2.7, tabulate could be
written as follows:
def tabulate[T](len: Int, f: Int => T) = {
val xs = new Array[T](len)
for (i <- 0 until len) xs(i) = f(i)
...
How to perform element-wise multiplication of two lists?
...ment in a loop. The short hand for doing that is
ab = [a[i]*b[i] for i in range(len(a))]
share
|
improve this answer
|
follow
|
...
return query based on date
...
You probably want to make a range query, for example, all items created after a given date:
db.gpsdatas.find({"createdAt" : { $gte : new ISODate("2012-01-12T20:15:31Z") }});
I'm using $gte (greater than or equals), because this is often used for date...
When should I choose Vector in Scala?
...Seq documentation.)
For an IndexedSeq you would normally choose a Vector. Ranges and WrappedStrings are also IndexedSeqs.
For a LinearSeq you would normally choose a List or its lazy equivalent Stream. Other examples are Queues and Stacks.
So in Java terms, ArrayList used similarly to Scala's Vec...
Why is \r a newline for Vim?
...stitute" of documentation on "Change". Here's what the command accepts:
:[range]s[ubstitute]/{pattern}/{string}/[flags] [count]
Notice the description about pattern and string
For the {pattern} see |pattern|.
{string} can be a literal string, or something
special; see |sub-replace-speci...