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If both [0] == 0 and 0 == [[0]] are true than why is [0] == [[0]] false?


If both [0] == 0 and 0 == [[0]] are true than why is [0] == [[0]] false?

By : user238678
Date : November 19 2020, 01:01 AM
Hope that helps [0] == 0 and 0 == [[0]] compares a primitive value with an object and thus type conversion will be performed. In both cases [0] and [[0]] will eventually be converted to the primitive value 0.
This is defined in steps 8 (and 9) of the The Abstract Equality Comparison Algorithm:
code :
" " == 0 // true
"\n" == 0 // true
" " == "\n" // false


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Give an O(N) algorithm to rearrange a list of true/false so that all false elements precede the true

Give an O(N) algorithm to rearrange a list of true/false so that all false elements precede the true


By : Frank Peng
Date : March 29 2020, 07:55 AM
wish helps you Keep an index (lastFalseIdx) where to insert a False element. So, initially it is 0. Traverse the array from left to right, and if False found, swap it with element at lastFalseIdx, and increment the index.
Python (almost pseudo-code):
code :
arr = [True, True, False, False, False, True]

print arr

lastFalseIdx = 0

for idx, val in enumerate(arr):
    if val == False:
        arr[lastFalseIdx], arr[idx] = arr[idx], arr[lastFalseIdx]   # swap elements
        lastFalseIdx = lastFalseIdx + 1

print arr
rails_admin change boolean default icon true and false instead string 'true' and 'false'

rails_admin change boolean default icon true and false instead string 'true' and 'false'


By : barca4ever
Date : March 29 2020, 07:55 AM
may help you . enter image description here , What I did was:
code :
field :reserved_seat do
   pretty_value do
    if bindings[:object].reserved_seat==true
        %{<span style="color:blank;" >ON</span>}.html_safe
      else
        %{<span style="color:blank;" >OFF</span>}.html_safe
    end
  end
 end   
Why does True == True evaluate to True, when {a statement that's equal to True} == True evaluates to false?

Why does True == True evaluate to True, when {a statement that's equal to True} == True evaluates to false?


By : user7841439
Date : March 29 2020, 07:55 AM
I wish did fix the issue. I'm having trouble explaining the contents of this script in Python3: , You need to use parentheses:
code :
(y in x) == True # evaluates to True
a OP1 b OP2 c
a OP1 b and b OP2 c
y in x == True
y in x and x == True
True and False
How can I check if a flag is either false/true and then to decide if to enable false/true a button in OnGUI?

How can I check if a flag is either false/true and then to decide if to enable false/true a button in OnGUI?


By : Hnin Hnin
Date : March 29 2020, 07:55 AM
This might help you You can make the drawing of the Button depend on wasUndo. But actually you don't need a global variable for that. I just used showButton .. if you want you can stick to your wasUndo anyway just using it the same way
code :
private void OnGUI
{
    var file = @"d:\json\json.txt";
    FileInfo fi = new FileInfo(file);

    // By default asume you don't want to show the button
    // it will than only be enabled if the later conditions match
    bool showButton = false;

    // you can check this already here not in the loop
    // if no file -> nothing to do
    if(!File.Exists(@"d:\json\json.txt") || fi.Length <= 0) return;


    // This is only reached if the file exists and is not empty

    // check for null transforms
    for (int i = 0; i < tempTransformSelection.Count(); i++)
    {
        // if not null do nothing
        if(tempTransformSelection[i] != null) continue;

        // otherwise enable the button and leave the loop
        showButton = true;
        break;
    }

    // if not true then button won't be shown
    if(!showButton ) return;

    if (GUILayout.Button("Undo last"))
    {
        TransformSaver.LoadTransform();
        showButton = false;
    }
}
if(!showButton) return;

...
EditorGUI.BeginDisabledGroup(!showButton);

if(GUILayout.Button("..."){ //... }

EditorGUI.EndDisabledGroup();
`python3` define a function when `list[True, True, True]`, return `False` when there exist `False` in the list

`python3` define a function when `list[True, True, True]`, return `False` when there exist `False` in the list


By : user2669053
Date : March 29 2020, 07:55 AM
Hope this helps Define a function that returns:
code :
True
False
False
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