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List directory in Go
...log"
"os"
"path/filepath"
)
func main() {
var (
root string
files []string
err error
)
root := "/home/manigandan/golang/samples"
// filepath.Walk
files, err = FilePathWalkDir(root)
if err != nil {
panic(err)
}
// ioutil.Rea...
Group by multiple columns in dplyr, using string vector input
... names, just in a formula instead. The point of the question is how to use strings so as to not have to type asihckhdoydk...
– Gregor Thomas
Jan 28 '15 at 0:18
...
namedtuple and default values for optional keyword arguments
...en executed", the annotations for 'Node' in the class fields above must be strings to avoid NameError.
This kind of type hints is called "forward reference" ([1], [2]), and with PEP 563 Python 3.7+ is going to have a __future__ import (to be enabled by default in 4.0) that will allow to use forward...
How to implement the --verbose or -v option into a script?
...ler doesn't need to
# stuff everything to be printed into a single string
for arg in args:
print arg,
print
else:
verboseprint = lambda *a: None # do-nothing function
(Yes, you can define a function in an if statement, and it'll only get defined if th...
Get the first item from an iterable that matches a condition
...for x in the_iterable if x > 3), default_value)
Note that you need an extra pair of parentheses around the generator expression in this case − they are needed whenever the generator expression isn't the only argument.
I see most answers resolutely ignore the next built-in and so I assume tha...
Warning: mysql_connect(): [2002] No such file or directory (trying to connect via unix:///tmp/mysql.
...ocalhost socket to work, and it may be of importance if you don't want the extra overhead from sending packets to the router before the database is accessed.
– Kebman
Apr 17 '13 at 22:00
...
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...
async await return Task
...ot work (I guess I am doing something wrong). Example static async Task<string> DoStuff() { ... = await SomeMethodAsync(); return "string value"; } .. var x = DoStuff(); But this x - is with type "Task<string>", not with type "string"... Why is that so?
– Prokurors...
What is the difference among col-lg-*, col-md-* and col-sm-* in Bootstrap?
...
Bootstrap 3
The Bootstrap 3 grid comes in 4 tiers (or "breakpoints")...
Extra small (for smartphones .col-xs-*)
Small (for tablets .col-sm-*)
Medium (for laptops .col-md-*)
Large (for laptops/desktops .col-lg-*).
These grid sizes enable you to control grid behavior on different widths. The diffe...
Web API 最佳入门指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...harpdriver。
public class Contact
{
[BsonId]
public string Id { get; set; }
public string Name { get; set; }
public string Phone { get; set; }
public string Email { get; set; }
public DateTime LastModified { get; set; }
}
我们需要添...