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Rails 3 datatypes?
...! Also, here's the official list: http://guides.rubyonrails.org/migrations.html#supported-types
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iOS 7: UITableView shows under status bar
...cumentation/userexperience/conceptual/TransitionGuide/SupportingEarlieriOS.html#//apple_ref/doc/uid/TP40013174-CH14-SW1
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JavaScript for detecting browser language preference [duplicate]
...emLanguage', 'userLanguage'],
i,
language;
// support for HTML 5.1 "navigator.languages"
if (Array.isArray(nav.languages)) {
for (i = 0; i < nav.languages.length; i++) {
language = nav.languages[i];
if (language && language.length) {
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Ruby Metaprogramming: dynamic instance variable names
... it to the values of the Hash. See ruby-doc.org/core-1.8.7/classes/Struct.html
– DigitalRoss
Jul 19 '11 at 4:38
2
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Should I impose a maximum length on passwords?
...it the length of fields passed via URLs: boutell.com/newfaq/misc/urllength.html
– sampablokuper
May 25 '12 at 8:18
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how do I insert a column at a specific column index in pandas?
...p://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.insert.html
using loc = 0 will insert at the beginning
df.insert(loc, column, value)
df = pd.DataFrame({'B': [1, 2, 3], 'C': [4, 5, 6]})
df
Out:
B C
0 1 4
1 2 5
2 3 6
idx = 0
new_col = [7, 8, 9] # can be a list, ...
搭建高可用mongodb集群（三）—— 深入副本集内部机制 - 大数据 & AI - 清...
...以运行的，参考这个文章http://www.itpub.net/thread-1740982-1-1.html。后来突然看了一篇stackoverflow的文章终于顿悟了，mongodb本身设计的就是一个可以跨IDC的分布式数据库，所以我们应该把它放到大的环境来看。
假设四个节点被分成两个...
Unique (non-repeating) random numbers in O(1)?
...ill not return good random numbers.. codinghorror.com/blog/archives/001015.html
– pro
Jan 3 '09 at 9:55
14
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Using helpers in model: how do I include helper dependencies?
...e advice from http://blog.caboo.se/articles/2008/8/25/sanitize-your-users-html-input , I'm cleaning up the input in the model before saving to database, using the before_validate callback.
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iPhone App 开发第一步：从零到真机调试HelloWorld - 更多技术 - 清泛网 - ...
...学来的，可参考此文：http://bbs.weiphone.com/read-htm-tid-1628444.html
要注意几个要点就是：（1）引导的iso要用对，在安装系统之前，因为是amd的机器（intel已经可以装lion了，此处不再讨论），应用darwin_snow_legacy.iso，进行引导，之...