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How do you use String.substringWithRange? (or, how do Ranges work in Swift?)
...can be O(n^2). You have been warned.
You just need to add a new subscript function that takes a range and uses advancedBy() to walk to where you want:
import Foundation
extension String {
subscript (r: Range<Int>) -> String {
get {
let startIndex = self.startIndex...
Simple regular expression for a decimal with a precision of 2
...e
deci_num_checker = re.compile(r"""^[0-9]+(\.[0-9]{1,2})?$""")
valid = ["123.12", "2", "56754", "92929292929292.12", "0.21", "3.1"]
invalid = ["12.1232", "2.23332", "e666.76"]
assert len([deci_num_checker.match(x) != None for x in valid]) == len(valid)
assert [deci_num_checker.match(x) == None fo...
How to change or add theme to Android Studio?
...
123
//you need to go to the File-> settings
in that choose IDE settings-> Appearance in tha...
How to throw an exception in C?
...exceptions in C. In C the errors are notified by the returned value of the function, the exit value of the process, signals to the process (Program Error Signals (GNU libc)) or the CPU hardware interruption (or other notification error form the CPU if there is)(How processor handles the case of divi...
How to show multiline text in a table cell
...er each line (see below) and it works for me.
George Benson </br>
123 Main Street </br>
New York, Ny 12344 </br>
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Remove duplicated rows
...for larger data sets
library(microbenchmark)
library(data.table)
set.seed(123)
DF <- as.data.frame(matrix(sample(1e8, 1e5, replace = TRUE), ncol = 10))
DT <- copy(DF)
setDT(DT)
microbenchmark(unique(DF), unique(DT))
# Unit: microseconds
# expr min lq mean median ...
Mysql - How to quit/exit from stored procedure
...ql.com/doc/refman/5.5/en/signal.html
How to raise an error within a MySQL function
http://www.databasejournal.com/features/mysql/mysql-error-handling-using-the-signal-and-resignal-statements.html
Addendum
As I'm re-reading this post of mine, I realized I had something additional to add. Prior t...
Rotation methods deprecated, equivalent of 'didRotateFromInterfaceOrientation'?
... share me the method you have used. Thank you
– ask123
Jun 23 '14 at 7:44
2
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How to Batch Rename Files in a macOS Terminal?
...
You can use a regex as well. rename 's/123/onetwothree/g' *
– Bryan
Aug 10 '16 at 17:52
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Variable length (Dynamic) Arrays in Java
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123
Yes: use ArrayList.
In Java, "normal" arrays are fixed-size. You have to give them a size an...