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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...
Google Maps V3 - How to calculate the zoom level for a given bounds
...LOBE_WIDTH = 256; // a constant in Google's map projection
var west = <?php echo $minLng; ?>;
var east = <?php echo $maxLng; ?>;
*var north = <?php echo $maxLat; ?>;*
*var south = <?php echo $minLat; ?>;*
var angle = east - west;
if (angle < 0) {
angle += 360;
}
*var a...
How do I get currency exchange rates via an API such as Google Finance? [closed]
... "USDIDR", "USDILS", "USDINR", "USDKRW", "USDMXN", "USDMYR", "USDNZD", "USDPHP", "USDSGD", "USDTHB", "USDZAR", "USDISK")&env=store://datatables.org/alltableswithkeys][1]
Here is the YQL query builder, where you can test a query and copy the url: (NO LONGER AVAILABLE)
http://developer.yahoo.com/y...
MySQL offset infinite rows
...
use php 'PHP_INT_MAX' to avoid overflow effects.
– Karl Adler
Apr 7 '14 at 15:11
| ...
一个自媒体的运营手记：我做公众号已经两年多了 - 资讯 - 清泛网 - 专注C/C...
...复公众号结果一部分直接回复了你，这个不是用户智商的问题，是因为有一少部分人比较随意，可能大致一看就回复你了。
这个都是推广中遇到的用户理解不对称问题。所以我在做图片的时候，在图片上写明了操作步骤，点击...
Create a folder if it doesn't already exist
...st( $wrapper, $target ) = explode( '://', $target, 2 );
}
// from php.net/mkdir user contributed notes
$target = str_replace( '//', '/', $target );
// put the wrapper back on the target
if( $wrapper !== null ) {
$target = $wrapper . '://' . $target;
}
// safe m...
Sort an Array by keys based on another Array?
Is it possible in PHP to do something like this? How would you go about writing a function? Here is an example. The order is the most important thing.
...
counting number of directories in a specific directory
...
Nice! How would you do this $ ls -l .vim with PHP? Or how to get only the total, without the list. I mean, in this case get only 52?
– Pathros
Mar 8 '17 at 18:32
...
Commands out of sync; you can't run this command now
I am trying to execute my PHP code, which calls two MySQL queries via mysqli, and get the error "Commands out of sync; you can't run this command now".
...
How to unstash only certain files?
...can also write
//git stash show stash@{1} --name-only
↓
ajax/product.php
ajax/productPrice.php
errors/Company/js/offlineMain.phtml
errors/Company/mage.php
errors/Company/page.phtml
js/konfigurator/konfigurator.js
Then apply the file you like to:
git checkout stash@{1} -- <filename&g...