Highest Voted 'truthiness' Questions

1

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1 answer

pass truthy value of two non-boolean values to a function in a more terse way

My goal here is to pass the non-empty value of 2 given values (either a string or an array) to a function foo. In Javascript I'd be able to do: // values of variables a and b when calling foo // a = "hello" // b = [] foo( a || b ) // passes a,…

c++ boolean-logic truthiness

asked Aug 25 '22 at 01:12

Ethicist

791
2
7
23

1

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2 answers

CodeBat Python - Logic 1 - where is the error in my logic?

The question, my answer, and the output is screenshotted here Constraints: 0=no ticket 1=small ticket 2=big ticket. If speed is 60 or less, the result is 0. If speed is between 61 and 80 inclusive, the result is 1. If speed is 81 or more, the result…

python logic truthiness

asked Jun 21 '22 at 16:20

Caleb

11
1

1

vote

1 answer

Check Truthiness of Values in Pandas Series

In pandas, is it possible to construct a boolean series for indexing that use custom objects? i.e. class Test(): def __init__(self, num): self.num = num def __bool__(self): return self.num == 3 x = Test(2) y = Test(3) df =…

python pandas numpy boolean truthiness

asked Mar 24 '21 at 16:08

ErstBlack

25
3

1

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1 answer

Testing truthiness in guards

I can use guards to test if an argument is true: defmodule Truth do def true?(term) when term, do: "#{term} is true" def true?(term), do: "#{term} is not true" end This works as expected for boolean values: Truth.true?(true) #=> "true is…

elixir truthiness guard-clause

asked Sep 25 '19 at 00:44

Adam Millerchip

20,844
5
51
74

1

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2 answers

Evaluate truthiness in Java

I am writing an interactive console app in Java. I need to ask the user questions with Boolean responses, however, Scanner.in.nextBoolean() is rather brittle in that it throws exceptions on incorrect input, so wrapping it in a method seems like a…

java string truthiness

asked Aug 20 '19 at 20:31

Ron Jensen

641
7
20

1

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4 answers

Is there a way to clarify the true and false statements in this JS?

I've been working on learning JS, and I can't seem to figure out why my boolean values keep coming back either always true or always false. So I believe I understand the basics of the truthy/falsy situation in JS, but I can't seem to get it right.…

javascript boolean truthiness

asked Apr 22 '19 at 16:52

Alexander Coffman

503
1
5
8

1

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1 answer

Use of IS outside of

I am not quite sure what this does. Is this short hand for Are there other truthy things that get set…

coldfusion coldfusion-2016 truthiness

asked May 04 '18 at 17:13

James A Mohler

11,060
15
46
72

1

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4 answers

Javascript Truthy / Falsy Operation

I have a question regarding javascript truthy / falsy As far as I know, any non-zero number including negative numbers is truthy. But if this is the case then why -1 == true //returns false But also -1 == false //returns false Can someone shed…

javascript casting truthiness

asked Feb 14 '18 at 12:39

Ovidiu

157
13

1

vote

1 answer

Can't understand validation logic: === vs ==

I'm learning validation stuff, and I just can't understand this: if (strpos($value, "@") === false) { echo "Validation failed." } What's the difference between === and ==? and why can't we use == instead and also why is it === false? does false…

php truthiness

asked May 07 '17 at 13:00

ZaKi SB

37
3

1

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1 answer

Why does Python's bool builtin only look at the class-level bool method

The documentation clearly states that When this method (__bool__) is not defined, __len__() is called, if it is defined, and the object is considered true if its result is nonzero. If a class defines neither __len__() nor __bool__(), all its…

python truthiness

asked Feb 09 '17 at 20:39

Mad Physicist

107,652
25
181
264

1

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2 answers

Is testing identity different than testing whether in a tuple?

I need to check if a function written by another team returns True or None. I want to check for identity, not equality. I'm unclear what type of check happens when using in. Which of the following does if result in (True, None): behave like? if…

python equality truthiness

asked Nov 29 '16 at 00:43

Jeff Widman

22,014
12
72
88

1

vote

6 answers

Return objects in array with 'true' parameters

I have a teamDetails array, within which is a squad array, within which are player objects. Each player object has an injured property which contains the value "true" or "false". I want to write a function that loops through the array returning only…

arrays angularjs foreach push truthiness

asked May 27 '16 at 08:25

Paulos3000

3,355
10
35
68

1

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2 answers

Python truthiness - Different behavior between different checks

I went through Truthiness in Python and understood that [] and similar empty objects are interpreted as False in Python. But when I type in the following in REPL, it returns False: >>> [] == False False How is this possible?

python truthiness

asked Apr 08 '16 at 11:36

chaudharyp

3,394
3
26
42

1

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5 answers

Python Regex - find a pattern of string in a word

I'm getting false positives in python for the following example. I'm trying to find if a key word exist in a string. The problem is that the string has words connected by usually an underscore or hyphen so I only want positive result if the keyword…

python regex truthiness

asked Nov 19 '15 at 01:42

MAXGEN

735
1
10
21

1

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1 answer

Why does this semi-colon cause a incorrect falsey result

Strange truth test results filter = /rob/gi >> /rob/gi filter.test('hey') >> false filter.test('rob') >> true true && filter.test('rob'); >> false true && filter.test('rob') ; >> true (true && filter.test('rob')); >> false (true &&…

javascript truthiness

asked May 01 '15 at 00:34

Parris

17,833
17
90
133

Questions tagged [truthiness]