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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...
Get keys from HashMap in Java
... with key "foo" and 2 with key "bar". To iterate over all the keys:
for ( String key : team1.keySet() ) {
System.out.println( key );
}
will print "foo" and "bar".
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ViewPager and fragments — what's the right way to store fragment's state?
...y FragmentPagerAdapter
switch (position) {
case 0:
String firstTag = createdFragment.getTag();
break;
case 1:
String secondTag = createdFragment.getTag();
break;
}
// ... save the tags somewhere so you can reference them lat...
What is the most compatible way to install python modules on a Mac?
...r elixir
( make sure you always type pip-(version) )
That will build an extra Python library in your home dir. Yes, Python will work with more than one library location: one controlled by MacPorts and a user local one for everything missing within MacPorts.
Now notice that I favor pip over easy_...
From io.Reader to string in Go
...
EDIT:
Since 1.10, strings.Builder exists. Example:
buf := new(strings.Builder)
n, err := io.Copy(buf, r)
// check errors
fmt.Println(buf.String())
OUTDATED INFORMATION BELOW
The short answer is that it it will not be efficient because co...
Migration: Cannot add foreign key constraint
...;
$table->integer('user_id')->unsigned();
$table->string('priority_name');
$table->smallInteger('rank');
$table->text('class');
$table->timestamps('timecreated');
});
Schema::table('priorities', function($table) {
$table->fo...
Looking for a clear definition of what a “tokenizer”, “parser” and...
...hes extra context to the tokens -- this token is a number, that token is a string literal, this other token is an equality operator.
A parser takes the stream of tokens from the lexer and turns it into an abstract syntax tree representing the (usually) program represented by the original text.
Las...
List attributes of an object
... ismethod() is used on the second element of i since the first is simply a string (its name).
Offtopic: Use CamelCase for class names.
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Relative paths in Python
...
os.path.dirname(__file__) can give an empty string, use os.path.dirname(os.path.abspath(__file__)) instead
– Dmitry Trofimov
Mar 10 '15 at 22:03
15
...
How do I bind a WPF DataGrid to a variable number of columns?
... {
Header = column.Name,
Binding = new Binding(string.Format("[{0}]", index++))
});
}
}
// E.g. myGrid.GenerateColumns(schema);
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