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Using two values for one switch case statement
... if (((year % 4 == 0) &&
!(year % 100 == 0))
|| (year % 400 == 0))
numDays = 29;
else
numDays = 28;
break;
default:
System.out.println("In...
Floating View 扩展：悬浮视图扩展，将组件转换为悬浮窗口 · App Inventor 2 中文网
....SetView 视图组件为 HorizontalArrangement1 可点击为true 位置X为100 位置Y为500
2. 音乐播放器悬浮控制
悬浮音乐控制面板：
当 音乐播放器.初始化
调用 FloatingView1.SetView 视图组件为 PlayerControl 可点击为true 位置X为5...
Linq: adding conditions to the where clause conditionally
...Where conditions are aggregated as OR or as AND?
– Vi100
Nov 27 '15 at 19:01
4
@vi100 they'll be ...
Hidden Features of SQL Server
... Great for small result sets. I wouldn't use it on a table with more than 10000 rows unless you've got time to spare
– John Sheehan
Sep 23 '08 at 15:18
...
HTML table with fixed headers?
...e="width:300px;border:6px green solid;">
<table border="1" width="100%" id="tblNeedsScrolling">
<thead>
<tr><th>Header 1</th><th>Header 2</th></tr>
</thead>
<tbody>
<tr><td>row 1, cell 1</td...
Is there a way to auto expand objects in Chrome Dev Tools?
...y (ab)using console.group:
expandedLog = (function(){
var MAX_DEPTH = 100;
return function(item, depth){
depth = depth || 0;
if (depth > MAX_DEPTH ) {
console.log(item);
return;
}
if (_.isObject(item)) {
_.each(item,...
Interface Builder: What are the UIView's Layout iOS 6/7 Deltas for?
...bit more clear:
<inset key="insetFor6xAndEarlier" minX="-50" minY="-100" maxX="-50" maxY="300"/>
The key name insetFor6xAndEarlier explicitly states what this does; you can provide alternative insets for UI elements when run on iOS 7's predecessors. For example, the above defines the fol...
What is the best way to determine the number of days in a month with JavaScript?
...
Unfortunately this fails for dates before 1000 AD where you can only set the year correctly by using SetFullYear(). To make it bullet proof use new Date( 2000+(year%2000), month, 0 ).getDate()
– Noel Walters
Feb 20 '13 at 14:55
...
What is the “-->” operator in C++?
...
+100
It's equivalent to
while (x-- > 0)
x-- (post decrement) is equivalent to x = x-1 so, the code transforms to:
while(x > 0) ...
Modifying a subset of rows in a pandas dataframe
...ease, use NumPy's where function.
Setup
Create a two-column DataFrame with 100,000 rows with some zeros.
df = pd.DataFrame(np.random.randint(0,3, (100000,2)), columns=list('ab'))
Fast solution with numpy.where
df['b'] = np.where(df.a.values == 0, np.nan, df.b.values)
Timings
%timeit df['b'] = np.w...