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Coding Practices which enable the compiler/optimizer to make a faster program
...ns" and variable sections. Think of mail-merge.
Declare constant text (string literals) as static const
When variables are declared without the static, some compilers may allocate space on the stack and copy the data from ROM. These are two unnecessary operations. This can be fixed by using t...
Creating an object: with or without `new` [duplicate]
...eletes a char array that it did not new. In fact, nothing newd the C-style string; it came from a string literal. deleteing that is an error (albeit one that will not generate a compilation error, but instead unpredictable behaviour at runtime).
Usually an object should not have the responsibility ...
What is the maximum length of latitude and longitude? [closed]
...12.3456789), longitude 10 (123.4567890), they both have maximum 7 decimals chars (At least is what i can find in Google Maps),
For example, both columns in Rails and Postgresql looks something like this:
t.decimal :latitude, precision: 9, scale: 7
t.decimal :longitude, precision: 10, scale: 7
...
Reading CSV file and storing values into an array
...
You can do it like this:
using System.IO;
static void Main(string[] args)
{
using(var reader = new StreamReader(@"C:\test.csv"))
{
List<string> listA = new List<string>();
List<string> listB = new List<string>();
while (!reader....
How do I convert an enum to a list in C#? [duplicate]
...lues(typeof(SomeEnum))
.Cast<SomeEnum>()
.Select(v => v.ToString())
.ToList();
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How do I check if a variable exists in a list in BASH
... to learn bashscript fundamentals and I wanted to know how you could parse string of list, into list, and you do the exist check in that list. I can understand you split using space but I couldn't fully understand the expression. Can you provide me the keywords to Google the fundamentals of this exp...
Encode String to UTF-8
I have a String with a "ñ" character and I have some problems with it. I need to encode this String to UTF-8 encoding. I have tried it by this way, but it doesn't work:
...
Select elements by attribute
...he above will fall into the else-branch when myattr exists but is an empty string or "0". If that's a problem you should explicitly test on undefined:
if ($('#A').attr('myattr') !== undefined) {
// attribute exists
} else {
// attribute does not exist
}
...
Is there a max array length limit in C++?
...ypically takes multiple times as much memory as an array of type vector<char> (minus a small constant value), since int is usually bigger than char. Therefore, a vector<char> may contain more items than a vector<int> before memory is full. The same counts for raw C-style arrays lik...
How to play with Control.Monad.Writer in haskell?
...sk for its type:
ghci> :t logNumber
logNumber :: (Show a, MonadWriter [String] m) => a -> m a
Which tells me that the inferred type is not a function that returns a particular writer, but rather anything that implements the MonadWriter type class. I can now use it:
ghci> let multWith...