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character showing up in files. How to remove them?
...but a BOM with the bytes reversed. It could happen on any platform, if you convert UTF-16 to UTF-8 and get the byte-order wrong (even though the purpose of the BOM is to prevent that error!)
– tripleee
Nov 24 '14 at 16:38
...
Changing column names of a data frame
...e called). The lesson here is, "don't write your code in an 'editor' that converts quotes to smart-quotes".
names(newprice)[1]<-paste(“premium”) # error
names(newprice)[1]<-paste("premium") # works
Also, you don't need paste("premium") (the call to paste is redundant) and it's a good...
Why does base64 encoding require padding if the input length is not divisible by 3?
...
On a related note, here's a base converter for arbitrary base conversion I created for you. Enjoy!
https://convert.zamicol.com/
What are Padding Characters?
Padding characters help satisfy length requirements and carry no meaning.
Decimal Example of Pa...
What does map(&:name) mean in Ruby?
...oo method, and used the & to signify that it has a to_proc method that converts it into a Proc.
This is very useful when you want to do things point-free style. An example is to check if there is any string in an array that is equal to the string "foo". There is the conventional way:
["bar", "...
Insert space before capital letters
...
Here is what i ended up using to convert a string to a title case, based on a few of the answers here:
str = str
.replace(/(_|-)/g, ' ')
.trim()
.replace(/\w\S*/g, function(str) {
return str.charAt(0).toUpperCase() + str.substr(1)
})
.repla...
Multiple HttpPost method in Web API controller
... routeTemplate: "api/{controller}/{id}",
defaults: null,
constraints: new { id = @"^\d+$" } // Only integers
);
// Controllers with Actions
// To handle routes like `/api/VTRouting/route`
config.Routes.MapHttpRoute(
name: "ControllerAndAction",
routeTemplate: "api/{controller}/{...
PHP Function Comments
...
Functions:
/**
* Does something interesting
*
* @param Place $where Where something interesting takes place
* @param integer $repeat How many times something interesting should happen
*
* @throws Some_Exception_Class If something interesting cannot...
How to find index of list item in Swift?
...e for Swift 4.2:
With Swift 4.2, index is no longer used but is separated into firstIndex and lastIndex for better clarification. So depending on whether you are looking for the first or last index of the item:
let arr = ["a","b","c","a"]
let indexOfA = arr.firstIndex(of: "a") // 0
let indexOfB =...
How can I reverse a NSArray in Objective-C?
...e)
- (void)reverse {
if ([self count] <= 1)
return;
NSUInteger i = 0;
NSUInteger j = [self count] - 1;
while (i < j) {
[self exchangeObjectAtIndex:i
withObjectAtIndex:j];
i++;
j--;
}
}
@end
...
Left Align Cells in UICollectionView
...leftMargin
leftMargin += layoutAttribute.frame.width + minimumInteritemSpacing
maxY = max(layoutAttribute.frame.maxY , maxY)
}
return attributes
}
}
If you want to have supplementary views keep their size, add the following at the top of the closure in...