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Assertions and testing emptiness of iterables

score 928 · Answer 1 · 2016-12-22T16:48:06.757000

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Assertions and testing emptiness of iterables

928 views Asked by boot-scootin At 22 December 2016 at 16:48

score 37484 · Answer 2 · 2014-11-13T10:12:02.650000

Is !! a best practice to check a truthy value in an if statement

37.4k views Asked by Bargitta At 13 November 2014 at 10:12

score 163 · Answer 3 · 2014-11-18T01:03:07.413000

How to check "truthyness" of an object, and then delete the falsy ones and edit the object

163 views Asked by Dylan Lott At 18 November 2014 at 01:03

score 2982 · Answer 4 · 2011-02-10T05:53:09.670000

Determining "Truthiness" of an expression?

2.9k views Asked by dnch At 10 February 2011 at 05:53

score 502 · Answer 5 · 2014-12-04T00:54:34.760000

Returning the truthiness of a variable rather than its value?

502 views Asked by K Engle At 04 December 2014 at 00:54

score 2711 · Answer 6 · 2014-12-09T13:20:26.177000

how to check xpath expression (if valid/not) before scraping data with spider

2.7k views Asked by techDiscussion At 09 December 2014 at 13:20

score 233 · Answer 7 · 2012-06-03T17:06:56.937000

Conditional value (like while loop) as method parameter

233 views Asked by Patrick Perini At 03 June 2012 at 17:06

score 173 · Answer 8 · 2020-12-11T04:08:57.217000

Is //(typeof(myVar) != "undefined")// logically equivalent to the truthy //if (myVar)?

173 views Asked by Mark Taylor At 11 December 2020 at 04:08

score 194 · Answer 9 · 2020-07-23T03:24:35.133000

comparing with `{}` and truthyness

194 views Asked by dcsan At 23 July 2020 at 03:24

score 711 · Answer 10 · 2014-05-22T01:50:34.140000

Why does {} == false throw an exception?

711 views Asked by Jonn At 22 May 2014 at 01:50

score 787 · Answer 11 · 2021-02-02T12:49:10.920000

Is !obj[key] a good practice to check the existence of an object's property in JavaScript?

787 views Asked by but-why At 02 February 2021 at 12:49

score 1512 · Answer 12 · 2017-12-17T21:02:13.467000

When can self == None

1.5k views Asked by Vorac At 17 December 2017 at 21:02

score 686 · Answer 13 · 2022-05-16T07:11:29.587000

How can I create a Proc to checking whether the elements of an array are nil or not?

686 views Asked by Dev At 16 May 2022 at 07:11

score 200 · Answer 14 · 2016-02-06T08:25:48.990000

Why would a truthy check on an enum value not work like I expect?

200 views Asked by marcamillion At 06 February 2016 at 08:25

score 990 · Answer 15 · 2010-09-05T06:44:08.087000

How can I avoid truthiness in Ruby?

990 views Asked by Andrew Grimm At 05 September 2010 at 06:44

score 305 · Answer 16 · 2015-05-22T16:28:10.333000

Iterate collection for truthy/falsey values

305 views Asked by AudioBubble At 22 May 2015 at 16:28

score 69 · Answer 17 · 2021-09-18T17:42:56.020000

Checking lots of variables for truthiness in a single pass

69 views Asked by Igniter At 18 September 2021 at 17:42

score 1258 · Answer 18 · 2021-09-24T10:48:44.690000

Typescript optional function truthy check

1.2k views Asked by Sean A.S. Mengis At 24 September 2021 at 10:48

score 139 · Answer 19 · 2021-02-22T00:21:49.437000

When I am testing for truthiness, why is my Object.create(null) value true while null is false?

139 views Asked by Codenameskidsnextdoor At 22 February 2021 at 00:21

score 425 · Answer 20 · 2014-08-12T19:33:05.370000

If ([] == false) is true, why does ([] || true) result in []?

425 views Asked by olive_tree At 12 August 2014 at 19:33

TechQA.

List Question

Assertions and testing emptiness of iterables

Is !! a best practice to check a truthy value in an if statement

How to check "truthyness" of an object, and then delete the falsy ones and edit the object

Determining "Truthiness" of an expression?

Returning the truthiness of a variable rather than its value?

how to check xpath expression (if valid/not) before scraping data with spider

Conditional value (like while loop) as method parameter

Is //(typeof(myVar) != "undefined")// logically equivalent to the truthy //if (myVar)?

comparing with `{}` and truthyness

Why does {} == false throw an exception?

Is !obj[key] a good practice to check the existence of an object's property in JavaScript?

When can self == None

How can I create a Proc to checking whether the elements of an array are nil or not?

Why would a truthy check on an enum value not work like I expect?

How can I avoid truthiness in Ruby?

Iterate collection for truthy/falsey values

Checking lots of variables for truthiness in a single pass

Typescript optional function truthy check

When I am testing for truthiness, why is my Object.create(null) value true while null is false?

If ([] == false) is true, why does ([] || true) result in []?

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