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Java内存泄露原因详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...用着。
例:
Static Vector v = new Vector(10);
for (int i = 1; i<100; i++)
{
Object o = new Object();
v.add(o);
o = null;
}
在这个例子中,循环申请Object 对象,并将所申请的对象放入一个Vector 中,如果仅仅释放引用本身(o=null),那么...
Redis消息通知系统的实现 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...不断的插入,代码如下:
<?php
for ($msgid = 1; $msgid <= 1000000; $msgid++) {
$redis->sAdd('usr:<USRID>:msg', $msgid);
}
?>
说明:这里我使用了SET数据类型,当然你也可以视需求换成LIST或者ZSET。
Redis的速度是很快的,但是借助PIPELINE,...
Plot yerr/xerr as shaded region rather than error bars
...plot as pl
import numpy as np
pl.clf()
pl.hold(1)
x = np.linspace(0, 30, 100)
y = np.sin(x) * 0.5
pl.plot(x, y, '-k')
x = np.linspace(0, 30, 30)
y = np.sin(x/6*np.pi)
error = np.random.normal(0.1, 0.02, size=y.shape) +.1
y += np.random.normal(0, 0.1, size=y.shape)
pl.plot(x, y, 'k', color='#CC4...
如何抓住痛点做出让用户尖叫的产品 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...时候微信群是有人数限制的,默认好像是40,可以升级成100或更多。微信默认是隐藏昵称只显示头像的,群聊的人一多,就分不清到底谁是谁了,这时很多人就会去群设置中开启“显示群成员昵称”,加的群多了,每次都要去设...
App Inventor 2 中文网原创内容 · App Inventor 2 中文网
...tor 2 添加超过10个屏幕会怎样?
【算法】如何计算1加到100的总和?(经典循环的写法)
【算法】App Inventor 2 算法之二分算法(Binary Search)实现,快速查找定位
组件用法
【微数据库】每次打开app时保持上一次关闭时的状...
Draw in Canvas by finger, Android
...R_X*2, CENTER_Y*2);
}
private static final int CENTER_X = 100;
private static final int CENTER_Y = 100;
private static final int CENTER_RADIUS = 32;
private int floatToByte(float x) {
int n = java.lang.Math.round(x);
return n;
...
Center image in table td in CSS
...for me:
<style>
.super-centered {
position:absolute;
width:100%;
height:100%;
text-align:center;
vertical-align:middle;
z-index: 9999;
}
</style>
<table class="super-centered"><tr><td style="width:100%;height:100%;" align="center" valign="mi...
Is there a Google Voice API? [closed]
...xcessive given the current Google Voice interface. Each poll returns over 100K of content, so you'd use a quarter-gigabyte a day just polling every 30 seconds. There's a discussion on Google Code about this.
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...
.prop() vs .attr()
...
+100
Update 1 November 2012
My original answer applies specifically to jQuery 1.6. My advice remains the same but jQuery 1.6.1 changed t...
How to prepare a Unity project for git? [duplicate]
...= #
# OS generated #
# ============ #
.DS_Store
.DS_Store?
._*
.Spotlight-V100
.Trashes
Icon?
ehthumbs.db
Thumbs.db
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