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浮点数在内存中的表示 - C/C++ - 清泛网 - 专注C++内核技术

...:大家面试的时候可能会经常遇到考察浮点数与零比较的问题,是简单的 f == 0 吗?当然不是,正确的写法应该是f > -1e-7 && f < 1e-7,为什么呢? 浮点型,由于精度关系(float精度:2^23 = 8388608,一共7位,同理double 16位),最小分...
https://www.tsingfun.com/it/cp... 

浮点数在内存中的表示 - C/C++ - 清泛网移动版 - 专注C++内核技术

...:大家面试的时候可能会经常遇到考察浮点数与零比较的问题,是简单的 f == 0 吗?当然不是,正确的写法应该是f > -1e-7 && f < 1e-7,为什么呢? 浮点型,由于精度关系(float精度:2^23 = 8388608,一共7位,同理double 16位),最小分...
https://www.tsingfun.com/it/cp... 

浮点数在内存中的表示 - C/C++ - 清泛网 - 专注C/C++及内核技术

...:大家面试的时候可能会经常遇到考察浮点数与零比较的问题,是简单的 f == 0 吗?当然不是,正确的写法应该是f > -1e-7 && f < 1e-7,为什么呢? 浮点型,由于精度关系(float精度:2^23 = 8388608,一共7位,同理double 16位),最小分...
https://www.tsingfun.com/it/cp... 

浮点数在内存中的表示 - C/C++ - 清泛网移动版 - 专注C/C++及内核技术

...:大家面试的时候可能会经常遇到考察浮点数与零比较的问题,是简单的 f == 0 吗?当然不是,正确的写法应该是f > -1e-7 && f < 1e-7,为什么呢? 浮点型,由于精度关系(float精度:2^23 = 8388608,一共7位,同理double 16位),最小分...
https://www.tsingfun.com/it/cp... 

浮点数在内存中的表示 - C/C++ - 清泛网 - 专注C/C++及内核技术

...:大家面试的时候可能会经常遇到考察浮点数与零比较的问题,是简单的 f == 0 吗?当然不是,正确的写法应该是f > -1e-7 && f < 1e-7,为什么呢? 浮点型,由于精度关系(float精度:2^23 = 8388608,一共7位,同理double 16位),最小分...
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How do I make a text input non-editable?

...nt input to be shown, but totally disabled (even processing languages like PHP wont be able to read those). share | improve this answer | follow | ...
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How to get the request parameters in Symfony 2?

... It is different from what PHP uses, but it actually makes more sense. $_GET data is data from the query string (no GET request needed at all) and $_POST data is data from the request body (does not have to be a POST request either, could be PUT). ...
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Precedence and bitmask operations

... Seems to me that PHP has strnage operator precedence overall. – Alvin Wong Feb 24 '14 at 10:11 ...
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Use PHP composer to clone git repo

I'm trying to use composer to automatically clone a git repository from github that isn't in packagist but it's not working and I can't figure out what am I doing wrong. ...
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Can I use my existing git repo with openshift?

... | 0 bytes/s, done. Total 3 (delta 2), reused 0 (delta 0) remote: Stopping PHP 5.4 cartridge (Apache+mod_php) remote: Waiting for stop to finish remote: Waiting for stop to finish remote: Building git ref 'master', commit 3fc96b2 remote: Preparing build for deployment remote: Deployment id is 9037d3...