大约有 6,000 项符合查询结果（耗时：0.0144秒） [XML]
LINQ to Entities does not recognize the method 'System.String ToString()' method, and this method ca
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Cast table to Enumerable, then you call LINQ methods with using ToString() method inside:
var example = contex.table_name.AsEnumerable()
.Select(x => new {Date = x.date.ToString("M/d/yyyy")...)
But be careful, when ...
How to check if IEnumerable is null or empty?
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Count() only iterates the enumeration if it can't be cast to an ICollection. In other words, when you call this method, if there's already a Count property on the object, it will just return that and the performance should be identical. Check out the implementation here: refere...
ElasticSearch, Sphinx, Lucene, Solr, Xapian. Which fits for which usage? [closed]
...osts
# index location
charset_type = utf-8
}
Test script:
<?php
require "sphinxapi.php";
$safetag = $_GET["my_post_slug"];
// $safetag = preg_replace("/[^a-z0-9\-_]/i", "", $safetag);
$conf = getMyConf();
$cl = New SphinxClient();
$cl->SetServer($conf["ser...
What does LINQ return when the results are empty
...nto another query. This caused the second query to throw no matter what I cast it to because there was no value being fed into the second query.
– trevorc
Nov 30 '11 at 21:11
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Eclipse interface icons very small on high resolution screen in Windows 8.1
...lved in Eclipse 4.6 Neon https://www.eclipse.org/downloads/index-developer.php (the current developer version).
The icons look a bit sad (low resolution) but at least they are scaled correctly on my 4k screen.
share
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How to add extension methods to Enums
...od to all enums like returning an int of current value instead of explicit casting?
public static class EnumExtensions
{
public static int ToInt<T>(this T soure) where T : IConvertible//enum
{
if (!typeof(T).IsEnum)
throw new ArgumentException("T must be an enumera...
How to set selected value of jquery select2?
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Html:
<select id="lang" >
<option value="php">php</option>
<option value="asp">asp</option>
<option value="java">java</option>
</select>
JavaScript:
$("#lang").select2().select2('val','asp');
jsfiddle
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Best practices/performance: mixing StringBuilder.append with String.concat
...would create a new StringBuilder on each line, append the Strings and then cast back to String, while the third method only uses one StringBuilder for the whole thing.
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How can I change a file's encoding with vim?
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thank you! Apache was outputting utf-8, so was php, so the browser said, so vim said with set encoding, and still the pages showed mangled characters that were alright as iso-8859-1. using set fileencoding showed a pretty 'Latin1'
– Adriano Varoli Pi...
Git: How to return from 'detached HEAD' state
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warning: unable to unlink web/sites/default/default.settings.php: Permission denied
... other warnings ...
Note: checking out '1.87.1'.
You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
st...