大约有 47,000 项符合查询结果(耗时:0.0587秒) [XML]

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Java String - See if a string contains only numbers and not letters

I have a string that I load throughout my application, and it changes from numbers to letters and such. I have a simple if statement to see if it contains letters or numbers but, something isn't quite working correctly. Here is a snippet. ...
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How to calculate the number of occurrence of a given character in each row of a column of strings?

I have a data.frame in which certain variables contain a text string. I wish to count the number of occurrences of a given character in each individual string. ...
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Split string with delimiters in C

How do I write a function to split and return an array for a string with delimiters in the C programming language? 20 Answe...
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Convert string[] to int[] in one line of code using LINQ

I have an array of integers in string form: 6 Answers 6 ...
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Is there a float input type in HTML5?

According to html5.org , the "number" input type's "value attribute, if specified and not empty, must have a value that is a valid floating point number." ...
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ToList()— does it create a new list?

Let's say I have a class 12 Answers 12 ...
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iOS UIImagePickerController result image orientation after upload

I am testing my iPhone application on an iOS 3.1.3 iPhone. I am selecting/capturing an image using a UIImagePickerController : ...
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What does `kill -0 $pid` in a shell script do?

Basically, what signal does '0' represent, because here I see SIGNAL numbers starting from 1. 6 Answers ...
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A simple explanation of Naive Bayes Classification

I am finding it hard to understand the process of Naive Bayes, and I was wondering if someone could explain it with a simple step by step process in English. I understand it takes comparisons by times occurred as a probability, but I have no idea how the training data is related to the actual datase...
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How to do exponential and logarithmic curve fitting in Python? I found only polynomial fitting

I have a set of data and I want to compare which line describes it best (polynomials of different orders, exponential or logarithmic). ...