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Efficiently checking if arbitrary object is NaN in Python / numpy / pandas?
My numpy arrays use np.nan to designate missing values. As I iterate over the data set, I need to detect such missing values and handle them in special ways.
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chrome undo the action of “prevent this page from creating additional dialogs”
I sometimes find that I need to re-enable alerting for debugging. Of course I can close the tab and reload it but Is there a better way?
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Migration: Cannot add foreign key constraint
...smallInteger('rank');
$table->text('class');
$table->timestamps('timecreated');
});
Schema::table('priorities', function($table) {
$table->foreign('user_id')->references('id')->on('users');
});
}
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Is there a splice method for strings?
The Javascript splice only works with arrays. Is there similar method for strings? Or should I create my own custom function?
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What is the benefit of using “SET XACT_ABORT ON” in a stored procedure?
...L Server to rollback the entire transaction and abort the batch when a run-time error occurs. It covers you in cases like a command timeout occurring on the client application rather than within SQL Server itself (which isn't covered by the default XACT_ABORT OFF setting.)
Since a query timeout wil...
Get the real width and height of an image with JavaScript? (in Safari/Chrome)
...the height and width property after the image is loaded. Instead of using timeouts, I'd recommend using an image's onload event. Here's a quick example:
var img = $("img")[0]; // Get my img elem
var pic_real_width, pic_real_height;
$("<img/>") // Make in memory copy of image to avoid css is...
Remove portion of a string after a certain character
I'm just wondering how I could remove everything after a certain substring in PHP
15 Answers
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C++STL容器使用经验总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
C++STL容器使用经验总结第1条：慎重选择容器类型。标准STL序列容器：vector、string、deque和list。标准STL关联容器：set、multiset、map和multimap。非标准序列容...
第1条：慎重选择容器类型。
标准STL序列容器：vector、string、deque和list...
Android Hello-World compile error: Intellij cannot find aapt
I'm trying to get set up with an Android development environment using IntelliJ in Ubuntu 12.04. I create an Android Application Module, but when I try to build, I get the following error:
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In Python, how do I iterate over a dictionary in sorted key order?
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@CrandellWS: The best way to answer the time question is with the Python timeit module.
– Peter Rowell
Oct 18 '15 at 17:12
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