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C# elegant way to check if a property's property is null
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You're obviously looking for the Nullable Monad:
string result = new A().PropertyB.PropertyC.Value;
becomes
string result = from a in new A()
from b in a.PropertyB
from c in b.PropertyC
select c.Value;
This returns null, ...
Making a request to a RESTful API using python
...ld take optional "params" parameter which is usually a dict carrying query string. If a payload is necessary to fetch data (such as the example posted in question), then "requests.post" needs to be used. Additionally using "json" library makes it easier to parse json response.
–...
Overriding the java equals() method - not working?
... numberOfParameters;
private Level loggingLevel;
private String messageCode;
See the options avaliable to customize which fields to use in the equals. Lombok is avalaible in maven. Just add it with provided scope:
<dependency>
<groupId>org.projectlombok</...
Random color generator
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You can remove .split('') call. String already have Array indexer.
– ujeenator
Jul 27 '15 at 6:08
4
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中文网（自研/维护）拓展 · App Inventor 2 中文网
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ConnectionState
Method that returns the connection state
HexaStringMode
Method to specify the mode (string or hexastring)
SeqNewLine
Method that returns a string containing “\n” sequence
SeqNewLineAndRet
Method that returns a string containing “\n\r” sequence
SeqRet...
How to create a zip archive with PowerShell?
... version instead) and use this PowerShell method:
function create-7zip([String] $aDirectory, [String] $aZipfile){
[string]$pathToZipExe = "$($Env:ProgramFiles)\7-Zip\7z.exe";
[Array]$arguments = "a", "-tzip", "$aZipfile", "$aDirectory", "-r";
& $pathToZipExe $arguments;
}
You ca...
How can I reverse a list in Python?
...tr (depending on what you're slicing). @Einar Petersen that is reversing a string, so the output is correct. Try: co2=['ae','ad','ac','ab','aa','z','y','x','w','v','u','t','s','r','q','p','o','n','m','l','k','j','i','h','g','f','e','d','c','b','a'] >>> co2[::-1]
– Aaro...
How to override to_json in Rails?
...oked to create the data structure, and then that hash is encoded as a JSON string using ActiveSupport::json.encode. This happens for all types: object, numeric, date, string, etc (see the ActiveSupport code).
ActiveRecord objects behave the same way. There is a default as_json implementation that c...
How do you display JavaScript datetime in 12 hour AM/PM format?
...Balz If minutes is less than 10 (e.g. 16:04), then that statement adds the string "0" so that the formatted output is "4:04 PM" instead of "4:4 PM". Note that in the process, minutes changes from a Number to a String.
– Caleb Bell
Jun 29 '13 at 21:05
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What are all the common ways to read a file in Ruby?
... a starting point perl.com/article/21/2013/4/21/Read-an-entire-file-into-a-string
– the Tin Man
Aug 28 at 0:28
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