大约有 32,000 项符合查询结果（耗时：0.0570秒） [XML]
C# elegant way to check if a property's property is null
...
If ANY of these properties are null, then the entire statement returns as null. It starts from left to right. Without the syntactical sugar this is equivalent to a series of if statements where if(propertyX == null) {value = null} else if (propertyY == null){ va...
Current location permission dialog disappears too quickly
...The only thing is, the alert view that asks for the users location appears then disappears so quickly it's impossible to click it!
...
From Arraylist to Array
...
Then it's empty.
– IMustBeSomeone
Jun 29 '16 at 19:43
1
...
Delete multiple remote branches in git
...f you have / in your branch names (if you're using git-flow or something), then print {$2"/"$3} instead
– ajma
Mar 9 '15 at 22:01
4
...
How do I concatenate strings and variables in PowerShell?
...es, the question is how to access object properties. so if $name.id -eq 42 then "... $name.id ..." would not work like you want because it would render like ... @{id=42}.id ... instead of the desired ... 42 ... For that, use the answer's method "... $($name.id) ...". I'm bookmarking question to edit...
Why can't I use background image and color together?
...
RE: @AnishNair - The background: is shorthand and then assumes there is no image specified and walks over the background-image
– sheriffderek
May 4 '16 at 23:30
...
ToList()— does it create a new list?
...l create a new list, but because in this case MyObject is a reference type then the new list will contain references to the same objects as the original list.
Updating the SimpleInt property of an object referenced in the new list will also affect the equivalent object in the original list.
(If My...
RegEx for matching UK Postcodes
...ion to use. I find it's best not to be too restrictive with a regex as you then need to ensure it is updated with any changes or you could have very angry users. I feel its better to loosely match with a simplified regex to weed out the obvious errors and then apply further checks such as an addre...
Error message “Forbidden You don't have permission to access / on this server” [closed]
...sts worked for me. If you have Apache setup to listen on, say, port 8080, then use <VirtualHost *:8080>, and just as you have to use the url http://localhost:8080, you will need to use the url http://web_site_name.com:8080. 4) In the end, I went with @hmoyat's <Directory> configuratio...
var self = this?
...
If you are doing ES2015 or doing type script and ES5 then you can use arrow functions in your code and you don't face that error and this refers to your desired scope in your instance.
this.name = 'test'
myObject.doSomething(data => {
console.log(this.name) // this shoul...