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How to iterate over a JavaScript object?
...
906
For most objects, use for .. in :
for (let key in yourobject) {
console.log(key, yourobject[...
多媒体组件 · App Inventor 2 中文网
...形状
设置文件选择器的形状，此属性的有效值为：
0（默认）
1 （圆形）
2（矩形）
3（椭圆形）。
如果设置了图像，则形状将不可见。
显示反馈
设置文件选择器指定 图像后被按压是否显示视觉反馈。...
Safe (bounds-checked) array lookup in Swift, through optional bindings?
... return indices.contains(index) ? self[index] : nil
}
}
Swift 3.0 and 3.1
extension Collection where Indices.Iterator.Element == Index {
/// Returns the element at the specified index if it is within bounds, otherwise nil.
subscript (safe index: Index) -> Generator.Element? {...
OSX - How to auto Close Terminal window after the “exit” command executed.
...or me
– Frankenmint
Dec 26 '15 at 3:08
Obvious and clean, perfect.
– aydinugur
...
How to display pandas DataFrame of floats using a format string for columns?
... '${:,.2f}'.format
df = pd.DataFrame([123.4567, 234.5678, 345.6789, 456.7890],
index=['foo','bar','baz','quux'],
columns=['cost'])
print(df)
yields
cost
foo $123.46
bar $234.57
baz $345.68
quux $456.79
but this only works if you want every float to...
How can bcrypt have built-in salts?
... in the database, a bcrypt "hash" might look something like this:
$2a$10$vI8aWBnW3fID.ZQ4/zo1G.q1lRps.9cGLcZEiGDMVr5yUP1KUOYTa
This is actually three fields, delimited by "$":
2a identifies the bcrypt algorithm version that was used.
10 is the cost factor; 210 iterations of the key derivatio...
How to convert a string into double and vice versa?
...nearest int can then be done as
int myInt = (int)(myDouble + (myDouble>0 ? 0.5 : -0.5))
I'm honestly not sure if there's a more streamlined way to convert back into a string than
NSString* myNewString = [NSString stringWithFormat:@"%d", myInt];
...
What is the simplest and most robust way to get the user's current location on Android?
... provider is available I start location listeners and timeout timer. It's 20 seconds in my example, may not be enough for GPS so you can enlarge it.
If I get update from location listener I use the provided value. I stop listeners and timer.
If I don't get any updates and timer elapses I have to use...
How to execute an .SQL script file using c#
...
10 Answers
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Difference between == and === in JavaScript [duplicate]
... |
edited Aug 29 '18 at 0:58
аlex dykyі
3,6272121 silver badges3535 bronze badges
answered Feb 7 '09...