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What are the use cases for selecting CHAR over VARCHAR in SQL?
...er set) storing the word "FooBar"
CHAR(6) = 6 bytes (no overhead)
VARCHAR(100) = 8 bytes (2 bytes of overhead)
CHAR(10) = 10 bytes (4 bytes of waste)
The bottom line is CHAR can be faster and more space-efficient for data of relatively the same length (within two characters length difference).
Not...
Changing the interval of SetInterval while it's running
...i'); }, 10, 10);
setDeceleratingTimeout(function(){ console.log('bye'); }, 100, 10);
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How to present popover properly in iOS 8
...elf
popover.sourceView = self.view
popover.sourceRect = CGRectMake(100,100,0,0)
self.presentViewController(nav, animated: true, completion: nil)
}
That's the way.
You don't talk to the popover itself anymore, you talk to the view controller inside of it to set the content size, by ...
How to get disk capacity and free space of remote computer
... in powershell why does 1mb return a value of 1048576 and not 1000000 ????
– oldboy
Jan 1 at 4:56
...
Export query result to .csv file in SQL Server 2008
... add two lines at the top of the script: Add-PSSnapin SqlServerCmdletSnapin100 and Add-PSSnapin SqlServerProviderSnapin100.
– Eric J.
Dec 7 '14 at 22:28
...
How Scalable is SQLite? [closed]
... others that have lots of traffic. They suggest that if you have less than 100k hits per day, SQLite should work fine. And that was written before they delivered the "Writeahead Logging" feature.
If you want to speed things up with SQLite, do the following:
upgrade to SQLite 3.7.x
Enable write-...
ActiveRecord.find(array_of_ids), preserving order
...ql called FIELD()
Here is how you could use it in .find():
>> ids = [100, 1, 6]
=> [100, 1, 6]
>> WordDocument.find(ids).collect(&:id)
=> [1, 6, 100]
>> WordDocument.find(ids, :order => "field(id, #{ids.join(',')})")
=> [100, 1, 6]
For new Version
>> WordDo...
How to draw a line in android
...(Canvas canvas) {
super.onDraw(canvas);
startX = 20;
startY = 100;
stopX = 140;
stopY = 30;
canvas.drawLine(startX, startY, stopX, stopY, paint);
}
Drawing a Line with View
If you only need a straight horizontal or vertical line, then the easiest way may be to just use a...
How to detect the physical connected state of a network cable/connector?
...ported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
...
onMeasure custom view explanation
...ure(int widthMeasureSpec, int heightMeasureSpec) {
int desiredWidth = 100;
int desiredHeight = 100;
int widthMode = MeasureSpec.getMode(widthMeasureSpec);
int widthSize = MeasureSpec.getSize(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
int hei...