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Javascript - removing undefined fields from an object [duplicate]
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To remove undefined props in an object we use like this
JSON.parse(JSON.stringify(obj));
Output: {a: 1, c: 3}
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Calling dynamic function with dynamic number of parameters [duplicate]
...ith arbitrary functions, pass the function itself instead of its name as a string:
function dispatch(fn, args) {
fn = (typeof fn == "function") ? fn : window[fn]; // Allow fn to be a function object or the name of a global function
return fn.apply(this, args || []); // args is optional, u...
No output to console from a WPF application?
...anagedCodeSecurity]
public static class ConsoleManager
{
private const string Kernel32_DllName = "kernel32.dll";
[DllImport(Kernel32_DllName)]
private static extern bool AllocConsole();
[DllImport(Kernel32_DllName)]
private static extern bool FreeConsole();
[DllImport(Kern...
How do I properly clean up Excel interop objects?
...Set = CharSet.Unicode)]
static extern IntPtr CreateJobObject(object a, string lpName);
[DllImport("kernel32.dll")]
static extern bool SetInformationJobObject(IntPtr hJob, JobObjectInfoType infoType, IntPtr lpJobObjectInfo, uint cbJobObjectInfoLength);
[DllImport("kernel32.dll", Set...
How do I make my GUI behave well when Windows font scaling is greater than 100%
...nction StandardizeFormFont(AForm: TForm): Real;
var
preferredFontName: string;
preferredFontHeight: Integer;
begin
GetUserFontPreference({out}preferredFontName, {out}preferredFontHeight);
//e.g. "Segoe UI",
Result := Toolkit.StandardizeFormFont(AForm, PreferredFontName, Pre...
Using switch statement with a range of value in each case?
... ternary operators.
public class Solution {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int num = Integer.parseInt(sc.nextLine());
switch ((1 <= num && num <= 5 ) ? 0 :
(6 <= num && num <= 1...
Importing a CSV file into a sqlite3 database table using Python
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I keep getting not all arguments converted during string formatting when I attempt this method.
– Whitecat
Sep 1 '16 at 23:27
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Python (and Python C API): __new__ versus __init__
...he __new__ method is that the instance variable will start out as an empty string, as opposed to NULL. But why is this ever useful, since if we cared about making sure our instance variables are initialized to some default value, we could have just done that in the __init__ method?
Considering the...
How to move a model between two Django apps (Django 1.7)
...ion
Point all of the FK references to the new model. If you aren't using string references, move the old model to the bottom of models.py (DON'T remove it) so it doesn't compete with the imported class.
Run makemigrations but DON'T wrap anything in state_operations (the FK changes should actually ...
Is there any Rails function to check if a partial exists?
...orks, but the calling convention doesn't work with the single partial name string, instead it takes template_exists?(name, prefix, partial)
To check for partial on path:
app/views/posts/_form.html.slim
Use:
lookup_context.template_exists?("form", "posts", true)
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