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What is a lambda (function)?
...ions. For some languages like JavaScript a lambda expression is a specific form of an anonymous function. The JavaScript example you gave is an anonymous function without lambda syntax whereas the JavaScript (ES6) example you gave is a lambda expression.
– Kyle Delaney
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Naming returned columns in Pandas aggregate function? [duplicate]
...rmost level, you can use the ravel() function on the multi-level column to form new labels:
df.columns = ["_".join(x) for x in df.columns.ravel()]
For example:
import pandas as pd
import pandas.rpy.common as com
import numpy as np
data = com.load_data('Loblolly')
print(data.head())
# heig...
How can javascript upload a blob?
...
Try this
var fd = new FormData();
fd.append('fname', 'test.wav');
fd.append('data', soundBlob);
$.ajax({
type: 'POST',
url: '/upload.php',
data: fd,
processData: false,
contentType: false
}).done(function(data) {
console...
How does grep run so fast?
... like
-n disable this optimization.)
This answer is a subset of the information taken from here.
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What characters are valid for JavaScript variable names?
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Basically, in regular expression form: [a-zA-Z_$][0-9a-zA-Z_$]*. In other words, the first character can be a letter or _ or $, and the other characters can be letters or _ or $ or numbers.
Note: While other answers have pointed out that you can use Unicode...
How to access a preexisting collection with Mongoose?
...
Where in the docs can i find this information? This really helpped but there's no place explaining the plural thing.
– StudioWorks
Apr 7 '14 at 20:31
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Convert string to integer type in Go?
...also a handy fmt.Sscanf() which gives even greater flexibility as with the format string you can specify the number format (like width, base etc.) along with additional extra characters in the input string.
This is great for parsing custom strings holding a number. For example if your input is prov...
Difference between socket and websocket?
...ete this accepted answer, I would kindly ask you to edit it with correct information. Thanks!
– Pablo Santa Cruz
Feb 11 '11 at 21:59
2
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What is the proper way to URL encode Unicode characters?
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The general rule seems to be that browsers encode form responses according to the content-type of the page the form was served from. This is a guess that if the server sends us "text/xml; charset=iso-8859-1", then they expect responses back in the same format.
If you're jus...
Nullable vs. int? - Is there any difference?
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The ? form is just a shorthand for the full type. Personal preference is the only reason to choose one over the other.
Full details here.
The syntax T? is shorthand for
Nullable<T>, where T is a value type.
The two ...