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Why are Oracle table/column/index names limited to 30 characters?
..., but there is always a case that turns up where we hit this limit - especially in naming foreign keys.
10 Answers
...
Which is the preferred way to concatenate a string in Python?
...b):
0.0132720470428
a.join(a):
0.114929914474
Well, append/join is marginally faster there if you are using extremely long strings (which you usually aren't, what would you have a string that's 100MB in memory?)
But the real clincher is Python 2.3. Where I won't even show you the timings, because...
Versioning SQL Server database
...cript means being able to "spin up" a fresh database without going through all the migration steps. It also makes it possible to diff the current version against accumulated previous versions.
– mlibby
Jun 16 '09 at 21:50
...
How to write logs in text file when using java.util.logging.Logger
I have a situation in which I want to write all logs created by me into a text file.
10 Answers
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How do I replace NA values with zeros in an R dataframe?
...then assign it to the location/name on the left. In this case, we aren't really "doing" anything - just making zeroes. The left side is saying: look at the d object, inside the d object (the square brackets), find all the elements that return TRUE (is.na(d) returns a logical for each element). Once...
hash function for string
... *input++;
result = rol(result, 5);
}
}
Edit: Also note that 10000 slots is rarely a good choice for a hash table size. You usually want one of two things: you either want a prime number as the size (required to ensure correctness with some types of hash resolution) or else a power of ...
多媒体组件 · App Inventor 2 中文网
...看 →
快速上手
拍照后压缩到最长边 1080 像素、质量 80，显示出来再上传：
when Camera1.AfterPicture(图像位址) {
var photo = ImageTools1.Compress(图像位址, 1080, 80)
Image1.Picture = photo
Web1.Url = "https://example.com/upload"
Web1...
node.js: read a text file into an array. (Each line an item in the array.)
...oids the mentioned substring (tested on a file several megabytes worth of "All work and no play makes Jack a dull boy"):
function readLines(input, func) {
var remaining = '';
input.on('data', function(data) {
remaining += data;
var index = remaining.indexOf('\n');
var last = 0;
...
append to url and refresh page
...2 main scenarios.
– greaterKing
Jan 10 '17 at 18:57
1
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How to lose margin/padding in UITextView?
...of the silliest bugs in iOS.
The class given here, UITextViewFixed is a usually the most reasonable solution overall.
Here is the class:
@IBDesignable class UITextViewFixed: UITextView {
override func layoutSubviews() {
super.layoutSubviews()
setup()
}
func setup() {
...