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Passing enum or object through an intent (the best solution)
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For passing an enum by intent, you can convert enum into integer.
Ex:
public enum Num{A ,B}
Sending(enum to integer):
Num send = Num.A;
intent.putExtra("TEST", send.ordinal());
Receiving(integer to enum):
Num rev;
int temp = intent.getIntExtra("TEST", -1);...
How should one use std::optional?
... paper: N3672, std::optional:
optional<int> str2int(string); // converts int to string if possible
int get_int_from_user()
{
string s;
for (;;) {
cin >> s;
optional<int> o = str2int(s); // 'o' may or may not contain an int
if (o) { ...
Why use non-member begin and end functions in C++11?
...sn't a use for it. Pointers are pointers, arrays are arrays. Arrays can be converted to a pointer to their first element implicitly, but the is still just a regular old pointer, with no distinction with others. Of course you can't get the "end" of a pointer, case closed.
– GMan...
Why is String.chars() a stream of ints in Java 8?
... it rarely used at all. However it would be good to have a built-in way to convert back IntStream to the String. It can be done with .reduce(StringBuilder::new, (sb, c) -> sb.append((char)c), StringBuilder::append).toString(), but it's really long.
– Tagir Valeev
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Get column index from column name in python pandas
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Or when using libraries which want the DF converted to a numpy array and indices of columns with particular features. For example CatBoost wants a list of indices of categorical features.
– Tom Walker
Oct 13 '17 at 5:35
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WPF TemplateBinding vs RelativeSource TemplatedParent
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One more thing - TemplateBindings don't allow value converting. They don't allow you to pass a Converter and don't automatically convert int to string for example (which is normal for a Binding).
share...
In Python, how do I index a list with another list?
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It works better if you need to convert it for array operations anyways. Too time-consuming for regular list operations.
– frankliuao
Jan 3 '19 at 19:25
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Break when a value changes using the Visual Studio debugger
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You can also temporarily convert a field to a property and put a breakpoint on the getter or setter.
– Jon Davis
Nov 5 '14 at 23:14
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NSUserDefaults - How to tell if a key exists
...ject, I set it as an object, as I could then test to see if it was nil:
//converting BOOL to an object so we can check on nil
[defaults setObject:@(_talkative) forKey:@"talkative"];
Then when I went to see if it existed, I used:
if ([defaults objectForKey:@"talkative"]!=nil )
{
Then I used t...
What is the C# equivalent of NaN or IsNumeric?
... @Gishu: You are right if all you care about is whether the number can convert.
– NotMe
Jan 16 '09 at 15:25
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