大约有 12,000 项符合查询结果（耗时：0.0377秒） [XML]
Is there a simple way to remove multiple spaces in a string?
...
foo is your string:
" ".join(foo.split())
Be warned though this removes "all whitespace characters (space, tab, newline, return, formfeed)" (thanks to hhsaffar, see comments). I.e., "this is \t a test\n" will effectively ...
How do I execute a string containing Python code in Python?
... A common case where someone wants to use 'exec' is something like if s=='foo': x.foo = 42 elif s=='bar': x.bar = 42 etc, which they may then write as exec ("x.%s = 42" % s). For this common case (where you only need to access an object's attribute that is stored in a string), there is a much faste...
Why use strict and warnings?
... representing the name of a global variable.
use strict 'refs';
$ref = \$foo; # Store "real" (hard) reference.
print $$ref; # Dereferencing is ok.
$ref = "foo"; # Store name of global (package) variable.
print $$ref; # WRONG, run-time error under strict refs.
use warni...
Can “git pull --all” update all my local branches?
...swered Nov 30 '10 at 20:37
Fred FooFred Foo
316k6464 gold badges662662 silver badges785785 bronze badges
...
When NOT to use yield (return) [duplicate]
...very far away from this method invocation
public IEnumerable<string> Foo(Bar baz)
{
if (baz == null)
throw new ArgumentNullException();
yield ...
}
// DO this
public IEnumerable<string> Foo(Bar baz)
{
if (baz == null)
throw new ArgumentNullException();
...
Vim multiline editing like in sublimetext?
...umber of lines.
:g/<search>/.<your ex command>
example:
:g/foo/.s/bar/baz/g
The above command finds all lines that have foo, and replace all occurrences of bar on that line with baz.
:g/.*/
will do on every line
...
Is using a lot of static methods a bad thing?
...inating object:
i.e., changing:
public class BarUtil {
public static Foo transform(Bar toFoo) { ... }
}
into
public class Bar {
...
public Foo transform() { ...}
}
however in many situations this isn't possible (e.g., regular class code generation from XSD/WSDL/etc), or it will ma...
What is the purpose of willSet and didSet in Swift?
...ified without needing another field. For instance, in that example:
class Foo {
var myProperty: Int = 0 {
didSet {
print("The value of myProperty changed from \(oldValue) to \(myProperty)")
}
}
}
myProperty prints its old and new value every time it is modified...
Python how to write to a binary file?
...ng code example using Python 3 syntax:
from struct import pack
with open("foo.bin", "wb") as file:
file.write(pack("<IIIII", *bytearray([120, 3, 255, 0, 100])))
Here is shell one-liner:
python -c $'from struct import pack\nwith open("foo.bin", "wb") as file: file.write(pack("<IIIII", *by...
Batch equivalent of Bash backticks
...nly the first word is output. Run this at the prompt: for /f %a in ('"echo foo bar"') do echo "%a". It will print "foo".
– Dan Dascalescu
Nov 28 '14 at 5:59
...