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Default value in Go's method
...r chooses to use default values
// Both parameters are optional, use empty string for default value
func Concat1(a string, b int) string {
if a == "" {
a = "default-a"
}
if b == 0 {
b = 5
}
return fmt.Sprintf("%s%d", a, b)
}
**Option 2:** A single optional parameter at the end
/...
API pagination best practices
...e if you’ve a lot of local cached records suppose 500, then your request string will be too long like this:-
{
"isRefresh" : false,
"cached" : ["id1","id2","id3","id4","id5","id6","id7","id8","id9","id10",………,"id500"]//Too long request
}
Approach 2: When server is smart en...
throw Error('msg') vs throw new Error('msg')
...!(this instanceof Array)) { return new Array(arguments); }. (But note that String(x) and new String(x) are very different, and likewise for Number and Boolean.)
That said, in case of an error, it's not even required to throw an Error object... throw 'Bad things happened'; will work, tooYou can even...
How to create arguments for a Dapper query dynamically
...s(dictionary) to work, dictionary must be a IEnumerable<KeyValuePair<string, object>>, for instance Dictionary<string, object>. Dictionary<string,string> didn't work.
– Zar Shardan
Mar 26 '14 at 21:13
...
Create a CSV File for a user in PHP
...code I use to optionally encode CSV fields:
function maybeEncodeCSVField($string) {
if(strpos($string, ',') !== false || strpos($string, '"') !== false || strpos($string, "\n") !== false) {
$string = '"' . str_replace('"', '""', $string) . '"';
}
return $string;
}
...
Passing just a type as a parameter in C#
...common approaches. First, you can pass System.Type
object GetColumnValue(string columnName, Type type)
{
// Here, you can check specific types, as needed:
if (type == typeof(int)) { // ...
This would be called like: int val = (int)GetColumnValue(columnName, typeof(int));
The other opti...
How do I convert a string to a double in Python?
I would like to know how to convert a string containing digits to a double.
3 Answers
...
Can functions be passed as parameters?
...es:
package main
import "fmt"
// convert types take an int and return a string value.
type convert func(int) string
// value implements convert, returning x as string.
func value(x int) string {
return fmt.Sprintf("%v", x)
}
// quote123 passes 123 to convert func and returns quoted string.
...
Java Map equivalent in C#
...
You can index Dictionary, you didn't need 'get'.
Dictionary<string,string> example = new Dictionary<string,string>();
...
example.Add("hello","world");
...
Console.Writeline(example["hello"]);
An efficient way to test/get values is TryGetValue (thanx to Earwicker):
if (ot...
How to make inline functions in C#
...n<T>, which is roughly equivalent to Func<T, T, int>.
Func<string, string, int> compare1 = (l,r) => 1;
Comparison<string> compare2 = (l, r) => 1;
Comparison<string> compare3 = compare1; // this one only works from C# 4.0 onwards
These can be invoked directly as...