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记录一些Mac OS X技巧 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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修改终端的提示文字
环境变量PS1就是终端的提示文字格式，默认为“\h:\W \u\$”，可以用echo来查看：
echo $PS1
PS2则是换行后的提示符，默认为“>”。
部分可使用的格式有（完整的可以运行man bash，然后查看PROMPTING部分）...
Separate REST JSON API server and client? [closed]
...nd websites, smartphone apps, backend webservices, etc. So I really want a JSON REST API for each one.
18 Answers
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Check if a key exists inside a json object
The above is the JSON object I'm dealing with. I want to check if the 'merchant_id' key exists. I tried the below code, but it's not working. Any way to achieve it?
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How do I create JavaScript array (JSON format) dynamically?
...ot the answer you're looking for? Browse other questions tagged javascript json or ask your own question.
Get total number of items on Json object? [duplicate]
...ave an Object.keys function. In this case, you could do this:
Object.keys(jsonArray).length;
More details in this answer on How to list the properties of a javascript object
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ASP.NET MVC Ajax Error handling
... alert('oops, something bad happened');
}
});
Another way is to use JSON. So you could write a custom action filter on the server which catches exception and transforms them into JSON response:
public class MyErrorHandlerAttribute : FilterAttribute, IExceptionFilter
{
public void OnExcep...
Return HTTP status code 201 in flask
...sponse
> return Response("{'a':'b'}", status=201, mimetype='application/json')
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Why do people write the #!/usr/bin/env python shebang on the first line of a Python script?
...in/python -V
Python 2.5.1
$ cat my_script.py
#!/usr/bin/env python
import json
print "hello, json"
$ PATH=/usr/local/bin:/usr/bin
$ ./my_script.py
hello, json
$ PATH=/usr/bin:/usr/local/bin
$ ./my_script.py
Traceback (most recent call last):
File "./my_script.py", line 2, in <module>
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Installing a local module using npm?
...ency
[Edit] As of NPM 2.0, you can declare local dependencies in package.json
"dependencies": {
"bar": "file:../foo/bar"
}
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Get bitcoin historical data [closed]
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Bitstamp has live bitcoin data that are publicly available in JSON at this link. Do not try to access it more than 600 times in ten minutes or else they'll block your IP (plus, it's unnecessary anyway; read more here). The below is a C# approach to getting live data:
using (var WebCl...