Good for quick notifications that don't require interaction.
Swift
let alert = UIAlertController(title: "Toast", message: "Hello World", preferredStyle: .Alert)
presentViewController(alert, animated: true) {
let delay_s:Double = 2
let delayTime = dispatch_time(DI...
The standard doesn't specify if char should be signed or unsigned. Different compilers implement it differently, or might allow to change it using a command line switch.
(loop for i from 0 to 10
do (print i)) ; prints 0 1 2 3 4 5 6 7 8 9 10
(loop for i from 0 below 10
do (print i)) ; prints 0 1 2 3 4 5 6 7 8 9 10
(loop for i from 10 above 0
do (print i)) ; prints 10 9 8 7 6 5 4 3 2 1
(loop for i from 10 to 0
do (print i)) ; prints noth...
You should implement SFSafariViewControllerDelegate so that your class is notified when the user hits the Done button on the SafariViewController and you can dismiss it as well.
First declare your class to implement the protocol.
class MyClass: SFSafariViewControllerDelegate {
}
Implement th...
You can add items to a user's Reading List in Safari by calling the addItem method on the SSReadingList singleton.
let readingList = SSReadingList.default()
readingList?.addItem(with: yourURL, title: "optional title", previewText: "optional preview text")
The default Reading...
Considering the following dictionary:
d = {"a": 1, "b": 2, "c": 3}
To iterate through its keys, you can use:
for key in d:
print(key)
Output:
"a"
"b"
"c"
This is equivalent to:
for key in d.keys():
print(key)
...
The following program says hello to the user. It takes one positional argument, the name of the user, and can also be told the greeting.
import argparse
parser = argparse.ArgumentParser()
parser.add_argument('name',
help='name of user'
)
parser.add_argument('-g', '--greeting',
...
To find every vector of the form (x, y) where x is drawn from vector X and y from Y, we use expand.grid:
X = c(1, 1, 2)
Y = c(4, 5)
expand.grid(X, Y)
# Var1 Var2
# 1 1 4
# 2 1 4
# 3 2 4
# 4 1 5
# 5 1 5
# 6 2 5
The result is a data.frame with one...
Using the dateutil library as in the previous example on parsing timezone-aware timestamps, it is also possible to parse timestamps with a specified "short" time zone name.
For dates formatted with short time zone names or abbreviations, which are generally ambiguous (e.g. CST, which coul...
By default all datetime objects are naive. To make them timezone-aware, you must attach a tzinfo object, which provides the UTC offset and timezone abbreviation as a function of date and time.
Fixed Offset Time Zones
For time zones that are a fixed offset from UTC, in Python 3.2+, the datetime mod...
In Angular $scope is the glue between the Controller and the View that helps with all of our data binding needs. Controller As is another way of binding controller and view and is mostly recommended to use. Basically these are the two controller constructs in Angular (i.e $scope and Controller As).
...
It is possible to extract a date out of a text using the dateutil parser in a "fuzzy" mode, where components of the string not recognized as being part of a date are ignored.
from dateutil.parser import parse
dt = parse("Today is January 1, 2047 at 8:21:00AM", fuzzy=True)
pr...
package main
import (
"log"
"text/template"
"os"
)
type Person struct{
MyName string
MyAge int
}
var myTempContents string= `
This person's name is : {{.MyName}}
And he is {{.MyAge}} years old.
`
func main() {
t,err := temp...
To assign variables from the command-line, -v can be used:
$ awk -v myvar="hello" 'BEGIN {print myvar}'
hello
Note that there are no spaces around the equal sign.
This allows to use shell variables:
$ shell_var="hello"
$ awk -v myvar="$shell_var" 'BEGIN {print m...
When you want to use user generated content in the SQL, it with done with parameters. For example for searching user with the name aminadav you should do:
var username = 'aminadav';
var querystring = 'SELECT name, email from users where name = ?';
connection.query(querystring, [username], functi...
You send the query as a string and in response callback with the answer is received.
The callback gives you error, array of rows and fields.
Each row contains all the column of the returned table. Here is a snippet for the following explanation.
connection.query('SELECT name,email from users', fu...
git checkout --orphan new-orphan-branch
The first commit made on this new branch will have no parents and it will be the root of a new history totally disconnected from all the other branches and commits.
source
You can use a RecyclerView.ItemDecoration to put extra margins around each item in a RecyclerView. This can in some cases clean up both your adapter implementation and your item view XML.
public class MyItemDecoration
extends RecyclerView.ItemDecoration {
private final int extraMargin;
...
