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Set object property using reflection
...t can't be set.
Another approach is to get the metadata for the property, and then set it. This will allow you to check for the existence of the property, and verify that it can be set:
using System.Reflection;
MyObject obj = new MyObject();
PropertyInfo prop = obj.GetType().GetProperty("Name", Bi...
Getting request payload from POST request in Java servlet
...ols, all the content is in the Request Payload section in the headers tab, and the content is there, and I know that the POST is being received by the doPost method, but it just comes up blank.
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In Typescript, How to check if a string is Numeric
...9BX9') // NaN
You can also use the unary plus operator if you like shorthand:
+'1234' // 1234
+'9BX9' // NaN
Be careful when checking against NaN (the operator === and !== don't work as expected with NaN). Use:
isNaN(maybeNumber) // returns true if NaN, otherwise false
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Rails: Get Client IP address
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I would just use the request.remote_ip that's simple and it works. Any reason you need another method?
See: Get real IP address in local Rails development environment
for some other things you can do with client server ip's.
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Getting the caller function name inside another function in Python? [duplicate]
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There are two ways, using sys and inspect modules:
sys._getframe(1).f_code.co_name
inspect.stack()[1][3]
The stack() form is less readable and is implementation dependent since it calls sys._getframe(), see extract from inspect.py:
def stack(context=...
How to comment in Vim's config files: “.vimrc”?
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And it shouldn't have a closing ".
– Arslan Ali
Mar 21 '15 at 10:12
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How to get a specific “commit” of a gem from github?
I'm using rails_admin , and since it is in (very) active development, bugs turn up every now and then.
2 Answers
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not None test in Python [duplicate]
...with default parameters. is tests identity in Python. Because there is one and only one instance of None present in a running Python script/program, is is the optimal test for this. As Johnsyweb points out, this is discussed in PEP 8 under "Programming Recommendations".
As for why this is preferred...
Member initialization while using delegated constructor
I've started trying out the C++11 standard and i found this question which describes how to call your ctor from another ctor in the same class to avoid having a init method or the like. Now i'm trying the same thing with code that looks like this:
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Windows batch: call more than one command in a FOR loop?
Is it possible in Windows batch file to call more than one command in a single FOR loop? Let's say for example I want to print the file name and after delete it:
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