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App Inventor 2 使用 MaterialIcons 图标字体，快捷展示专业图标 · App Inventor 2 中文网
...色，它还会自动改变颜色，且不用担心高分辨率不清晰的问题，非常的便捷。
一般使用 MaterialIcons-Regular.ttf 大名鼎鼎的图标库字体，里面的图标非常丰富，效果参考如下：
只需要填入图标的英文代码即可，上图已 qr_code 二维...
Get first n characters of a string
How can I get the first n characters of a string in PHP? What's the fastest way to trim a string to a specific number of characters, and append '...' if needed?
...
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...
How to open multiple pull requests on GitHub
...ing issue (something you can't do from the web UI):
$ git pull-request -i 123
[ attached pull request to issue #123 ]
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What's the difference between eval, exec, and compile?
...gt; g = dict()
>>> l = dict()
>>> exec('global a; a, b = 123, 42', g, l)
>>> g['a']
123
>>> l
{'b': 42}
(If you display the value of the entire g, it would be much longer, because exec and eval add the built-ins module as __builtins__ to the globals automaticall...
linux内存cached释放 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...write,getdents)的时间。"
如何解决这个导致机器变慢的问题呢？
罪魁祸首就是内存都被cached了，free的基本没有了
所以我们应该想想如何把cached内存释放出来
重启机器肯定是可以解决，但是我们肯定是不能用这样的办法
...
为什么mfc对话框字体不正常 - VC/MFC - 清泛IT论坛，有思想、有深度
...么mfc对话框字体显示不正常，新建一个默认工程字体没有问题。
原因：
由于VS2005以上版本的对话框资源代码拷到了VS 05中，
FONT 9, "宋体, MS Sans Serif", 0, 0, 0x0
而VS2005不支持&quo...
MySQL offset infinite rows
...
use php 'PHP_INT_MAX' to avoid overflow effects.
– Karl Adler
Apr 7 '14 at 15:11
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String concatenation: concat() vs “+” operator
...ing a = "abc";
public String b = "xyz";
public String c = "123";
}
@org.openjdk.jmh.annotations.State(Scope.Thread)
public static class State4 {
public String a = "abc";
public String b = "xyz";
public String c = "123";
public String d = ...