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Saving enum from select in Rails 4.1
...arkling</option>
</select>
Values went from "0" to "red" and now we're all set.
If you're using a regular ol' rails text_field it's:
f.select :color, Wine.colors.keys.to_a
If you want to have clean human-readable attributes you can also do:
f.select :color, Wine.colors.keys.ma...
Execute the setInterval function without delay the first time
...ve immediately after each other without any delay. Another reason is that if you want to stop the loop you have to explicitly call clearInterval which means you have to remember the handle returned from the original setInterval call.
So an alternative method is to have foo trigger itself for subse...
Doing something before program exit
...e atexit module:
http://docs.python.org/library/atexit.html
For example, if I wanted to print a message when my application was terminating:
import atexit
def exit_handler():
print 'My application is ending!'
atexit.register(exit_handler)
Just be aware that this works great for normal ter...
Create or write/append in text file
...
does this create a text file if it does not exist?
– Jerahmeel Acebuche
Jul 26 '14 at 15:19
5
...
How do I get indices of N maximum values in a NumPy array?
...]: array([4, 3, 1])
This involves a complete sort of the array. I wonder if numpy provides a built-in way to do a partial sort; so far I haven't been able to find one.
If this solution turns out to be too slow (especially for small n), it may be worth looking at coding something up in Cython.
...
Calculating distance between two points, using latitude longitude?
... upon this SOF article.
Obviously, the question was asked in 2010 and its now 2019.
But it comes up early in an internet search. The original question does not discount use of third-party-library (when I wrote this answer).
public double calculateDistanceInMeters(double lat1, double long1, double...
__declspec(dllexport) 导出符号解决链接失败问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
__declspec(dllexport) 导出符号解决链接失败问题特别注意：dllexport、dllimport导出、导入的方式仅针对dll动态库，而lib静态库无需任何申明，宏全部替换成空即可。error LNK2019: 无法解析的外部符号 "public: __thiscall CBtt::CBtt(void)" (??0CBtt@@Q...
悬浮窗使用指导 · App Inventor 2 中文网
...窗权限结果」：
global seconds = 0
when 按钮_开始.Click() {
if 悬浮窗1.HasOverlayPermission() {
悬浮窗1.ShowComponent(水平布局_计时)
} else {
悬浮窗1.RequestOverlayPermission()
}
}
when 悬浮窗1.OverlayPermissionResult(已授权) {
if 已授权 {
...
How to get a resource id with a known resource name?
...
Thankq for your reply .R.drawable.resourcename i am using now i need to get its integer value by passing resourcename
– Aswan
Aug 13 '10 at 11:45
2
...
Remove refs/original/heads/master from git repo after filter-branch --tree-filter?
...nificant disk space, you might also want to run git reflog expire --expire=now --all and git gc --prune=now to expire your reflogs and delete the now-unused objects. (Warning: completely, totally irreversible. Be very sure before you do it.)
...