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How to get first character of string?
... chartAt(0) in Firefox as of Firefox 71. See for yourself here: jsperf.com/testing-the-first-character-in-a-string/1
– Stephen M Irving
Dec 16 '19 at 21:54
1
...
Insert string at specified position
...text to the next line after it found the keyword.
$oldstring = "This is a test\n#FINDME#\nOther text and data.";
function insert ($string, $keyword, $body) {
return substr_replace($string, PHP_EOL . $body, strpos($string, $keyword) + strlen($keyword), 0);
}
echo insert($oldstring, "#FINDME#", ...
Adding a background image to a element
...
Use like ..
<div style="background-image: url(../images/test-background.gif); height: 200px; width: 400px; border: 1px solid black;">Example of a DIV element with a background image:</div>
<div style="background-image: url(../images/test-background.gif); height: 200px;...
How to organize large R programs?
...nterface
a lot of sanity checks via R CMD check
a chance to add regression tests
as well as a means for namespaces.
Just running source() over code works for really short snippets. Everything else should be in a package -- even if you do not plan to publish it as you can write internal packages fo...
Where to define custom error types in Ruby and/or Rails?
...w I'm handling custom errors in Rails, including attaching error messages, testing, and how to handle this with ActiveRecord models.
Creating Custom Error
class MyClass
# create a custome error
class MissingRequirement < StandardError; end
def my_instance_method
raise MyClass::Miss...
raw_input function in Python
...and run the program.
This is what it looked like for me:
C:\temp>type test.py
print "Halt!"
s = raw_input("Who Goes there? ")
print "You may pass,", s
C:\temp>python test.py
Halt!
Who Goes there? Magnus
You may pass, Magnus
I types my name and pressed [Enter] after the program
had printed...
in javascript, how can i get the last character in a string [duplicate]
...
var myString = "Test3";
alert(myString[myString.length-1])
here is a simple fiddle
http://jsfiddle.net/MZEqD/
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How to get the type of a variable in MATLAB?
...r one of its subclasses. You have to use strcmp with the class function to test if the object is specifically that type and not a subclass.
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foll...
Most used parts of Boost [closed]
...:
regex
filesystem
thread
lexical_cast
program_options (just brilliant!)
test (for all my unit testing needs).
String algorithms
String tokenizer
format (type-safe printf style string formatting)
smart ptrs
Boost was a massive help when I wrote my first cross-platform app - without it I really w...
Regular expression for matching HH:MM time format
...hing 12 hours (with am/pm) strings with the above regex, keep in mind that testing "13:00 PM" against the regex will return true (some values) because "3:00 PM" part in the string is valid. I resolved the issue by using the following if statement let res = value.match(regex); if (res && re...