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How to read a .xlsx file using the pandas Library in iPython?
I want to read a .xlsx file using the Pandas Library of python and port the data to a postgreSQL table.
6 Answers
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Check if null Boolean is true results in exception
...r null as any other object.
In your particular case, your Boolean is null and the if statement triggers an implicit conversion to boolean that produces the NullPointerException. You may need instead:
if(bool != null && bool) { ... }
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How to query SOLR for empty fields?
I have a large solr index, and I have noticed some fields are not updated correctly (the index is dynamic).
7 Answers
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How can I wait till the Parallel.ForEach completes
I'm using TPL in my current project and using Parallel.Foreach to spin many threads. The Task class contains Wait() to wait till the task gets completed. Like that, how I can wait for the Parallel.ForEach to complete and then go into executing next statements?
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Ways to circumvent the same-origin policy
...earching for this topic. This is one of the most searched-for topics on SO and there is no consolidated wiki for it so here I go :)
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Best way to implement request throttling in ASP.NET MVC?
...t;remarks>
/// We'll be inserting a Cache record based on this name and client IP, e.g. "Name-192.168.0.1"
/// </remarks>
public string Name { get; set; }
/// <summary>
/// The number of seconds clients must wait before executing this decorated route again.
//...
What is your preferred style for naming variables in R? [closed]
Which conventions for naming variables and functions do you favor in R code?
9 Answers
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Failed to execute 'btoa' on 'Window': The string to be encoded contains characters outside of the La
...blem has been bugging me again.
The simple truth is, atob doesn't really handle UTF8-strings - it's ASCII only.
Also, I wouldn't use bloatware like js-base64.
But webtoolkit does have a small, nice and very maintainable implementation:
/**
*
* Base64 encode / decode
* http://www.webtoolkit.inf...
Java LinkedHashMap get first or last entry
...ions has its own LinkedMap implementation, which has methods like firstKey and lastKey, which do what you're looking for. The interface is considerably richer.
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Dynamically creating keys in a JavaScript associative array
...rk well, are overcomplicated:
They use new Array(), which is an overkill (and an overhead) for a simple associative array (AKA dictionary).
The better ones use new Object(). It works fine, but why all this extra typing?
This question is tagged "beginner", so let's make it simple.
The über-simple ...