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delete_all vs destroy_all?
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80
It should also be noted that 1) Callbacks are not called when using delete_all, and 2) destroy_all instantiates all the records and destroys...
How to programmatically disable page scrolling with jQuery
...verflow'));
html.css('overflow', 'hidden');
window.scrollTo(scrollPosition[0], scrollPosition[1]);
// un-lock scroll position
var html = jQuery('html');
var scrollPosition = html.data('scroll-position');
html.css('overflow', html.data('previous-overflow'));
window.scrollTo(scrollPosition[0], scrol...
How to get thread id from a thread pool?
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answered Jul 20 '10 at 20:59
skaffmanskaffman
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Awk学习笔记 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...达式元字符
8. POSIX字符集
9. 匹配操作符(~)
10. 比较表达式
11. 范围模板
12. 一个验证passwd文件有效性的例子
13. 几个实例
14. awk编程
14.1. 变量
14.2. BEGIN模块
14.3. END模块
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Getting one value from a tuple
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207
You can write
i = 5 + tup()[0]
Tuples can be indexed just like lists.
The main difference b...
How do you clear a slice in Go?
...definition of 'clear'. One of the valid ones certainly is:
slice = slice[:0]
But there's a catch. If slice elements are of type T:
var slice []T
then enforcing len(slice) to be zero, by the above "trick", doesn't make any element of
slice[:cap(slice)]
eligible for garbage collection. This ...
How do I determine which iOS SDK I have?
...uild -showsdks
it gives something like this:
$> OS X SDKs:
OS X 10.8 -sdk macosx10.8
OS X 10.9 -sdk macosx10.9
iOS SDKs:
iOS 6.1 -sdk iphoneos6.1
iOS 7.0 -sdk iphoneos7.0
iOS Simulator...
Add missing dates to pandas dataframe
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270
You could use Series.reindex:
import pandas as pd
idx = pd.date_range('09-01-2013', '09-30-201...
MySQL remove all whitespaces from the entire column
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203
To replace all spaces :
UPDATE `table` SET `col_name` = REPLACE(`col_name`, ' ', '')
To remo...
Version of SQLite used in Android?
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UPDATE OCT 2016: Here is a link to the updated official docs which includes the main points in this answer: android.database.sqlite package-level javadoc
Using the emulators:
adb shell sqlite3 --version
UPDATE: Since SDK 29 (emulator...