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How to use R's ellipsis feature when writing your own function?
...me, except with a default argument:
> talk <- function(func, msg=c("Hello","World!"), ...){
+ func(msg, ...);
+ }
> talk(cat,sep=":")
Hello:World!
> talk(cat,sep=",", fill=1)
Hello,
World!
>
As you can see, you can use this to pass 'extra' arguments to a function within your fu...
Specify multiple attribute selectors in CSS
...e same attribute.
Here, the selector matches all SPAN elements whose "hello" attribute
has exactly the value "Cleveland" and whose "goodbye" attribute has
exactly the value "Columbus":
span[hello="Cleveland"][goodbye="Columbus"] { color: blue; }
As a side note, using quotation marks ...
Grep for literal strings
...
cat list.txt
one:hello:world
two:2:nothello
three:3:kudos
grep --color=always -F"hello
three" list.txt
output
one:hello:world
three:3:kudos
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How do I use prepared statements in SQlite in Android?
...es
String sql = "INSERT INTO table_name (column_1, column_2) VALUES (57, 'hello')";
SQLiteStatement statement = db.compileStatement(sql);
long rowId = statement.executeInsert();
Note that the executeInsert() method is used rather than execute(). Of course, you wouldn't want to always enter the sa...
Check if a string is html or not
...x does work but it won't detect unclosed html tags such as "'<strong>hello world". granted this is broken html therefore should be treated as a string but for practical purposes your app may want to detect these too.
– TK123
Sep 21 '16 at 19:39
...
Generate a Hash from string in Javascript
...sh) + currVal.charCodeAt(0))|0, 0);
}
// Test
console.log("hashCode(\"Hello!\"): ", hashCode('Hello!'));
EDIT (2019-11-04):
one-liner arrow function version :
const hashCode = s => s.split('').reduce((a,b) => (((a << 5) - a) + b.charCodeAt(0))|0, 0)
// test
console....
Check if a string has a certain piece of text [duplicate]
...
Here you go: ES5
var test = 'Hello World';
if( test.indexOf('World') >= 0){
// Found world
}
With ES6 best way would be to use includes function to test if the string contains the looking work.
const test = 'Hello World';
if (test.includes('World...
Split string on whitespace in Python [duplicate]
...thout an argument splits on whitespace:
>>> "many fancy word \nhello \thi".split()
['many', 'fancy', 'word', 'hello', 'hi']
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foll...
Rails - link_to helper with data-* attribute [duplicate]
...
Add a data- attribute by doing the following:
link_to "Hello", hello_path, :"data-attribute" => "yeah!"
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follow
...
Using a string variable as a variable name [duplicate]
...
You will be much happier using a dictionary instead:
my_data = {}
foo = "hello"
my_data[foo] = "goodbye"
assert my_data["hello"] == "goodbye"
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