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Is floating-point math consistent in C#? Can it be?
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52
+100
I know o...
How to concatenate items in a list to a single string?
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edited Sep 17 '12 at 5:48
answered Sep 17 '12 at 5:33
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What's the safest way to iterate through the keys of a Perl hash?
...eys with doubled values works fine using keys():
%h = (a => 1, b => 2);
foreach my $k (keys %h)
{
$h{uc $k} = $h{$k} * 2;
}
producing the expected resulting hash:
(a => 1, A => 2, b => 2, B => 4)
But using each() to do the same thing:
%h = (a => 1, b => 2);
keys %h...
When is SQLiteOpenHelper onCreate() / onUpgrade() run?
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edited Apr 27 at 6:55
community wiki
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Where do you include the jQuery library from? Google JSAPI? CDN?
... ? "https://" : "http://",
"ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.min.js' type='text/javascript'>\<\/script>"
].join(''));
</script>
UPDATE 9/8/2010 -
Some suggestions have been made to reduce the complexity of the code by removing the HTTP and HTTPS and sim...
How to concatenate strings of a string field in a PostgreSQL 'group by' query?
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PostgreSQL 9.0 or later:
Recent versions of Postgres (since late 2010) have the string_agg(expression, delimiter) function which will do exactly what the question asked for, even letting you specify the delimiter string:
SELECT company_id, string_agg(employee, ', ')
FROM mytable
GROUP BY ...
Arduino 101 实验01 - 让板载 LED 闪起来 · App Inventor 2 中文网
...生成 App 鸿蒙 · 一套积木，多端原生打包！ 下载 AI2伴侣 · 安卓/鸿蒙/iOS aia 源码商店 中文社区 中文教育版 各版本对比 关于 关于我们 发布日志 服务条款 ...
scrapy xpath抓取节点的文本innerText、innerHTML、outerHTML - 更多技术 -...
...内容：<p>xx<b>x< b>< p>response xpath(& 39; div[@class="question"] div[2] div[2] div[1] p[1]& 39;) extract() 抓 假设抓取：
<p>
xx<b>x</b>
</p>
scrapy代码：
# 抓取p节点本身，得到的内容：<p>xx<b>x</b></p>
response.xpath('//div[@class="question"]/div[2]/div[2]/d...
PHP 安装 ZIP 扩展 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...安装libzipcd usr local srcwget https: libzip org download libzip-1 3 2 tar gztar zxf libzip-1 3 2 tar gzcd libzip-1 3 2 configuremake && make install如 一、安装libzip
cd /usr/local/src
wget https://libzip.org/download/libzip-1.3.2.tar.gz
tar zxf libzip-1.3.2.tar.gz
cd libzip-1.3.2...