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In C# check that filename is *possibly* valid (not that it exists) [duplicate]
... can add a check for your filename containing any of the characters in the array returned by char[] badChars = Path.GetInvalidFileNameChars();
– Jon Dosmann
Feb 12 '15 at 18:27
...
Python Pandas: Get index of rows which column matches certain value
...50 True
[3 rows x 1 columns]
Note that loc can also accept boolean arrays:
In [55]: df.loc[df['BoolCol']]
Out[55]:
BoolCol
10 True
40 True
50 True
[3 rows x 1 columns]
If you have a boolean array, mask, and need ordinal index values, you can compute them using np.flatnonze...
Understanding slice notation
... start through stop-1
a[start:] # items start through the rest of the array
a[:stop] # items from the beginning through stop-1
a[:] # a copy of the whole array
There is also the step value, which can be used with any of the above:
a[start:stop:step] # start through not past s...
Validate decimal numbers in JavaScript - IsNumeric()
... var realStringObj = obj && obj.toString();
return !jQuery.isArray(obj) && (realStringObj - parseFloat(realStringObj) + 1) >= 0;
}
Update :
Angular 4.3:
export function isNumeric(value: any): boolean {
return !isNaN(value - parseFloat(value));
}
...
Python element-wise tuple operations like sum
...
from numpy import array
a = array( [1,2,3] )
b = array( [3,2,1] )
print a + b
gives array([4,4,4]).
See http://www.scipy.org/Tentative_NumPy_Tutorial
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...
Deserializing JSON data to C# using JSON.NET
...e JSON data should simply be left NULL.
UPDATE:
If the JSON string is an array, try this:
var jarray = JsonConvert.DeserializeObject<List<MyAccount>>(myjsondata);
jarray should then be a List<MyAccount>.
ANOTHER UPDATE:
The exception you're getting isn't consistent with an a...
How to monitor the memory usage of Node.js?
...{ rss: 22269952, heapTotal: 11803648, heapUsed: 4530208 }
> var a = new Array(1e7); // Allocate memory for 10m items in an array
undefined
> process.memoryUsage(); // Memory after allocating so many items
{ rss: 102535168, heapTotal: 91823104, heapUsed: 85246576 }
> a = null; ...
How to PUT a json object with an array using curl
...tackoverflow.com%2fquestions%2f15425446%2fhow-to-put-a-json-object-with-an-array-using-curl%23new-answer', 'question_page');
}
);
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Name
...
Android Reading from an Input stream efficiently
...d creating new String objects on each append and to avoid copying the char arrays. The implementation for your case would be something like this:
BufferedReader r = new BufferedReader(new InputStreamReader(inputStream));
StringBuilder total = new StringBuilder();
for (String line; (line = r.readLin...
What is JSON and why would I use it?
...object, record, struct, dictionary, hash table, keyed list, or associative array.
An ordered list of values. In most languages, this is realized as an array, vector, list, or sequence.
JSON Structure
Here is an example of JSON data:
{
"firstName": "John",
"lastName": "Smith",...