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How would I create a UIAlertView in Swift?
...should only be used when UIAlertController is not available. if NSClassFromString("UIAlertController") != nil { /* use UIAlertController * / } else { /* use UIAlertView * / }
– phatblat
Apr 16 '15 at 17:01
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How to extract a floating number from a string [duplicate]
I have a number of strings similar to Current Level: 13.4 db. and I would like to extract just the floating point number. I say floating and not decimal as it's sometimes whole. Can RegEx do this or is there a better way?
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Subscripts in plots in R
...
And if you want the subscript to be a string, just put it in quotes: plot(1:10, xlab=expression('hi'[5]*'there'[6]^8*'you'['down here']*'and'^'up'*'there'))
– Stewart Macdonald
Sep 11 '14 at 7:28
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Ruby: Easiest Way to Filter Hash Keys?
...n use the select method. You'll need to convert the key from a Symbol to a String to do the regexp match. This will give you a new Hash with just the choices in it.
choices = params.select { |key, value| key.to_s.match(/^choice\d+/) }
or you can use delete_if and modify the existing Hash e.g.
pa...
How to read from standard input in the console?
... bufio.NewReader(os.Stdin)
fmt.Print("Enter text: ")
text, _ := reader.ReadString('\n')
fmt.Println(text)
As it works on my machine. However, for the next block you need a pointer to the variables you're assigning the input to. Try replacing fmt.Scanln(text2) with fmt.Scanln(&text2). Don't use...
Declaring variables inside loops, good practice or bad practice?
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@BillyONeal: For string and vector specifically, the assignment operator can reuse the allocated buffer each loop, which (depending on your loop) may be a huge time savings.
– Mooing Duck
Jan 9 '18 at 22...
Apache Commons equals/hashCode builder [closed]
...way is even nicer:
Here's a sample Bean:
public class Bean{
private String name;
private int length;
private List<Bean> children;
}
Here's equals() and hashCode() implemented with Commons/Lang:
@Override
public int hashCode(){
return new HashCodeBuilder()
.append...
Escaping ampersand character in SQL string
...the ascii code for ampersand, and in this form it will be interpreted as a string, nothing else. I tried it and it worked.
Another way could be using LIKE and an underline instead the '&' character:
node_name LIKE 'Geometric Vectors _ Matrices'
The chance that you'll find some other recor...
How do you round to 1 decimal place in Javascript?
...nded.toFixed(1)
// fixed is always to 1 d.p.
// NOTE: .toFixed() returns a string!
// To convert back to number format
parseFloat(number.toFixed(2))
// 12.34
// but that will not retain any trailing zeros
// So, just make sure it is the last step before output,
// and use a number format during ca...
Replace spaces with dashes and make all letters lower-case
I need to reformat a string using jQuery or vanilla JavaScript
5 Answers
5
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