大约有 47,000 项符合查询结果（耗时：0.0458秒） [XML]
How to print to stderr in Python?
...
Advantage of the print statement is easy printing of non-string values, without having to convert them first. If you need a print statement, I would therefore recommend using the 3rd option to be python 3 ready
– vdboor
Apr 6 '12 at 11:22
...
Which method performs better: .Any() vs .Count() > 0?
...:
class TestTable
{
[Key]
public int Id { get; set; }
public string Name { get; set; }
public string Surname { get; set; }
}
Test code:
class Program
{
static void Main()
{
using (var context = new TestContext())
{
context.Database.Log = Cons...
What is a singleton in C#?
...dBalancer
{
private static LoadBalancer _instance;
private List<string> _servers = new List<string>();
private Random _random = new Random();
private static object syncLock = new object();
private LoadBalancer()
{
_servers.Add("ServerI");
_server...
How to perform file system scanning
...ain
import (
"path/filepath"
"os"
"flag"
"fmt"
)
func visit(path string, f os.FileInfo, err error) error {
fmt.Printf("Visited: %s\n", path)
return nil
}
func main() {
flag.Parse()
root := flag.Arg(0)
err := filepath.Walk(root, visit)
fmt.Printf("filepath.Walk() returned %v\...
Why is there “data” and “newtype” in Haskell? [duplicate]
... Bool
inside the CoolBool was True or False:
helloMe :: CoolBool -> String
helloMe (CoolBool _) = "hello"
Instead of applying this function to a normal CoolBool, let's throw it a curveball and apply it to undefined!
ghci> helloMe undefined
"*** Exception: Prelude.undefined
...
What to do with “Unexpected indent” in python?
... statement). All lines of code in a block must start with exactly the same string of whitespace. For instance:
>>> def a():
... print "foo"
... print "bar"
IndentationError: unexpected indent
This one is especially common when running python interactively: make sure you don't put a...
When to use ' (or quote) in Lisp?
... as their values, and markers where you in other languages would have used strings, such as keys to hash tables.
This is where quote comes in. Say you want to plot resource allocations from a Python application, but rather do the plotting in Lisp. Have your Python app do something like this:
pri...
Does Dart support enumerations?
...
how about this approach:
class FruitEnums {
static const String Apple = "Apple";
static const String Banana = "Banana";
}
class EnumUsageExample {
void DoSomething(){
var fruit = FruitEnums.Apple;
String message;
switch(fruit){
case(FruitEnums.Apple):
...
Getting All Variables In Scope
... var x = 0;
console.log(x);
};
You can convert your function to a string:
var s = f + '';
You will get source of function as a string
'function () {\nvar x = 0;\nconsole.log(x);\n}'
Now you can use a parser like esprima to parse function code and find local variable declarations.
var...
Javascript: Extend a Function
...tion () {
old_init.apply(this, arguments);
// Do something extra
};
init.prototype = old_prototype;
}) ();
share
|
improve this answer
|
follow
...