大约有 30,000 项符合查询结果（耗时：0.0383秒） [XML]
Max or Default?
...t I think it'd go something like this:
Dim x = (From y In context.MyTable _
Where y.MyField = value _
Select CType(y.MyCounter, Integer?)).Max
Or in C#:
var x = (from y in context.MyTable
where y.MyField == value
select (int?)y.MyCounter).Max();
...
How would I create a UIAlertView in Swift?
...ewController: UIViewController {
@IBAction func showAlertButtonTapped(_ sender: UIButton) {
// create the alert
let alert = UIAlertController(title: "My Title", message: "This is my message.", preferredStyle: UIAlertController.Style.alert)
// add an action (button)
...
Relative frequencies / proportions with dplyr
...
This answer is based upon Matifou's answer.
First I modified it to ensure that I don't get the freq column returned as a scientific notation column by using the scipen option.
Then I multiple the answer by 100 to get a percent rather th...
How do I recursively delete a directory and its entire contents (files + sub dirs) in PHP?
...mdir contains a decent implementation:
function rrmdir($dir) {
if (is_dir($dir)) {
$objects = scandir($dir);
foreach ($objects as $object) {
if ($object != "." && $object != "..") {
if (is_dir($dir. DIRECTORY_SEPARATOR .$object) && !is_link($dir."/"...
How do I open links in Visual Studio in my web browser and not in Visual Studio?
...tion.Text
'launch chrome with url
System.Diagnostics.Process.Start( _
Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData) _
+ "\Google\Chrome\Application\chrome.exe", url)
End Sub
Just put your cursor in front of the url and run the macro...
...
os.walk without digging into directories below
...
Use the walklevel function.
import os
def walklevel(some_dir, level=1):
some_dir = some_dir.rstrip(os.path.sep)
assert os.path.isdir(some_dir)
num_sep = some_dir.count(os.path.sep)
for root, dirs, files in os.walk(some_dir):
yield root, dirs, files
...
Adding values to a C# array
...
Based on the answer of Thracx (I don't have enough points to answer):
public static T[] Add<T>(this T[] target, params T[] items)
{
// Validate the parameters
if (target == null) {
targe...
Deserialize JSON with C#
...adString("https://api.instagram.com/v1/users/000000000/media/recent/?client_id=clientId");
// Write values
res = value;
dynamic dyn = JsonConvert.DeserializeObject(res);
var lstInstagramObjects = new List<InstagramModel>();
foreach(var obj in dyn.data)
{
lstInstagramObjects.A...
Devise form within a different controller
... "resource" you describe from one of my controllers, because my controller base class was missing the following (Rails-API ActionController::API was at fault):
include ActionController::Helpers
Thus the helper methods from Devise could not be resolved in the view.
To make Devise work with Rails-...
Loading Backbone and Underscore using RequireJS
...pendencies.
require.config({
shim: {
underscore: {
exports: '_'
},
backbone: {
deps: ["underscore", "jquery"],
exports: "Backbone"
}
}
});
//the "main" function to bootstrap your code
require(['jquery', 'underscore', 'backbone'], function ($, _, Backbone) { ...