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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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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?
...
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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两大桌面系统之战：Yosemite vs Windows 10 - 操作系统(内核) - 清泛网 - ...
...dows 10 和 OS X Yosemite。
桌面
OS X Yosemite 的桌面使用全新扁平设计，视觉上变化很大，不过功能还是一样。Dock 还在，还是可以在这里打开应用，用户可以通过 Stacks 来打开文件或者文件夹。Mission Control 方便你查看当前...
汇编常用寄存器及指令基础总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...存器：
IP（Intruction Pointer）：指令指针寄存器，与CS配合使用，可跟踪程序的执行过程
SP（Stack Pointer）：堆栈指针，与SS配合使用，可指向目前的堆栈位置
BP（Base Pointer）：基址指针寄存器，可用作SS的一个相对基址位置
SI（S...
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]
...
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...
GCM with PHP (Google Cloud Messaging)
...ation: key=' . $apiKey,
'Content-Type: application/json'
);
// Initialize curl handle
$ch = curl_init();
// Set URL to GCM push endpoint
curl_setopt($ch, CURLOPT_URL, 'https://gcm-http.googleapis.com/gcm/send');
// Set re...