大约有 16,000 项符合查询结果（耗时：0.0520秒） [XML]
LaTeX: Prevent line break in a span of text
...at the point of the command. With the
optional argument, number, you can convert the \nolinebreak command
from a demand to a request. The number must be a number from 0 to 4.
The higher the number, the more insistent the request is.
Source: http://www.personal.ceu.hu/tex/breaking.htm#nolineb...
SQL WHERE.. IN clause multiple columns
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While this would work, it converts the uncorrelated query in the question into a correlated query. Unless the query optimizer is clever, this might give you O(n^2) performance :-(. But maybe I'm underestimating the optimizer...
–...
Using Rails serialize to save hash to database
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add_column :users, :multi_wrong, :text
end
Then Rails will properly convert it into YAML for you (and perform proper serialization). Strings fields are limited in size and will only hold especially-small values.
share...
How do I check if a given string is a legal/valid file name under Windows?
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2nd piece of code doesn't compile. "Cannot convert from char[] to string
– Paul Hunt
Apr 25 '14 at 12:03
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How to initialize HashSet values by construction?
...;
Again, this is not time efficient since you are constructing an array, converting to a list and using that list to create a set.
When initializing static final sets I usually write it like this:
public static final String[] SET_VALUES = new String[] { "a", "b" };
public static final Set<Str...
HTML select form with option to enter custom value
...ext, to a GET of the same page as a query string. Does anyone know how to convert the action to a POST, so I can grab the value in a php file and do something with it there?
– Han
Sep 29 '19 at 8:17
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In C#, how can I create a TextReader object from a string (without writing to disk)
...es a TextReader object, and all I have is a string. What's the best way to convert a string into a TextReader object on the fly?
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Null or default comparison of generic argument in C#
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For me this doesn't work when using integers that are already boxed. Because it will then be an object and the default for object is null instead of 0.
– riezebosch
Nov 7 '11 at 19:11
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What is the difference between pluck and collect in Rails?
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Yes. According to Rails guides, pluck directly converts a database result into an array, without constructing ActiveRecord objects. This means better performance for a large or often-running query.
In addition to @apneadiving's answer, pluck can take both single and mult...
How to concatenate two IEnumerable into a new IEnumerable?
...m are likely close if not exactly called what you are after. Always browse IntelliSense, you learn a lot.
– Adam Houldsworth
Jan 31 '14 at 11:02
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