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'is' versus try cast with null check
... below the belt. Take a look at this example:
object o = "test";
if (o is string)
{
var x = (string) o;
}
This translates to the following IL:
IL_0000: nop
IL_0001: ldstr "test"
IL_0006: stloc.0 // o
IL_0007: ldloc.0 // o
IL_0008: isinst System.String
IL_000D...
You can't specify target table for update in FROM clause
...le, so the safest bet is to force you to specify what will happen using an extra table.
– siride
Mar 9 '13 at 20:54
37
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How to print SQL statement in codeigniter model
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To display the query string:
print_r($this->db->last_query());
To display the query result:
print_r($query);
The Profiler Class will display benchmark results, queries you have run, and $_POST data at the bottom of your pages.
T...
What is the purpose of using -pedantic in GCC/G++ compiler?
...f more extensions and generates more warnings. For example, if you have a string literal longer than 509 characters, then -pedantic warns about that because it exceeds the minimum limit required by the C89 standard. That is, every C89 compiler must accept strings of length 509; they are permitted ...
How do I update a GitHub forked repository?
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@JohnY Using GitHub will always create an extra commit. You need to do all this in a shell on a local repo to avoid that extra commit.
– Jonathan Cross
Oct 14 '16 at 21:51
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Why does ReSharper tell me “implicitly captured closure”?
...);
this.button1.Click += (sender, args) => this.label1.Text = i++.ToString();
this.button2.Click += (sender, args) => this.label1.Text = (g.Next() + i).ToString();
}
I get an "Implicitly captured closure: g" warning at the first lambda. It is telling me that g cannot be garbage colle...
How to change the font on the TextView?
...false;
private static Typeface[] fonts = new Typeface[3];
private static String[] fontPath = {
"fonts/FONT_NAME_1.ttf",
"fonts/FONT_NAME_2.ttf",
"fonts/FONT_NAME_3.ttf"
};
/**
* Returns a loaded custom font based on it's identifier.
*
* @param context - the current context
* @p...
How to apply bindValue method in LIMIT clause?
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Which prevents values passed per ->execute([...]) to always show up as strings.
Switch to manual ->bindValue(..., ..., PDO::PARAM_INT) parameter population.
Which however is less convenient than an ->execute list[].
Simply make an exception here and just interpolate plain integers when pr...
使用std::string作为std::map的key出错解决 - C/C++ - 清泛网 - 专注C/C++及内核技术
使用std::string作为std::map的key出错解决c: program files (x86) microsoft visual studio 11.0 vc include xstddef(180): error C2784: bool std::operator <(const st...c:\program files (x86)\microsoft visual studio 11.0\vc\include\xstddef(180): error C2784: “bool std::operator <(const std:...
Parse RSS with jQuery
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Why the $this.find("link").text() always returns empty string ''?
– Jeff Tian
Oct 3 '14 at 11:56
@...