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I have a parent component (SkinsController) that uses a state machine (bookmarkMachine) to manage the state of bookmarks. The best answers are voted up and rise to the top, Not the answer you're looking for? I think answers should be more predictable and showing better solution. It's bad practice to make identical calls to a method (here. Just make sure nobody else implements a different isNullOrEmpty in Object.prototype and heavily relies on his implementation. Thanks for contributing an answer to Stack Overflow! 584), Improving the developer experience in the energy sector, Statement from SO: June 5, 2023 Moderator Action, Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood. Well, since in your first conditional you already check to make sure that the return value isn't empty, why don't you put the body of the second conditional into the first one. Illustration: See the below illustration for a better understanding. Add property to object only if it is not undefined, How to add properties to initially typed object. Where in the Andean Road System was this picture taken? analemma for a specified lat/long at a specific time of day? What are the downsides of having no syntactic sugar for data collections? If you have multiple variables you have to get from your ResultSet and you need to check for null (or "null"), I would suggest to write a method you can reuse for other variables and perhaps wrap this in a ResultSetWrapper so you keep your code clean. When/How do conditions end when not specified? How to exactly find shift beween two functions? Making statements based on opinion; back them up with references or personal experience. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Description Nullish coalescing assignment short-circuits, meaning that x ? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing, This is a bit different setup than the OP had, where, The spread syntax is not available for Objects in ES6. Early binding, mutual recursion, closures. Best I could come up with is: But personally I find the second snippet kinda ugly and would probably just go with the first option, especially for the following three reasons, It will simply ignore nullish values or spread if objects. CreateContext hook is not passed data to child component on button click event, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing, Unable to update parent XState machine context from child component, The cofounder of Chef is cooking up a less painful DevOps (Ep. 10 I think I am somehow close to get it work, but for some reason I still get errors. If you are unable to support a minimum ES11, then you can explicitly check for null and undefined values, for example in an if/else or a ternary, like so: Hope you found this post useful. This ties it to the String object in all instances. Are there any MTG cards which test for first strike? By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. Is it appropriate to ask for an hourly compensation for take-home tasks which exceed a certain time limit? How can negative potential energy cause mass decrease. CREATE OR REPLACE TABLE `deleting.stack_overflow_tag_co_ocurrence` AS WITH data AS ( SELECT * FROM `fh-bigquery.stackoverflow_archive.201906_posts_questions` WHERE creation_date > '2018-01-01' ), active_tags AS ( SELECT tag, COUNT (*) c FROM data, UNNEST (SPLIT (tags, '|')) tag GROUP BY 1 HAVING c>180 ) SELECT *, questions/questions_tag1 . @avcajaraville the error in the question comes from the fact that. rev2023.6.28.43514. Essentially it boils down to the fact, you're looking for the negation of the nullish operator (or alternatively a nullish ternary), neither of which sadly exist (yet). Not the answer you're looking for? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 584), Improving the developer experience in the energy sector, Statement from SO: June 5, 2023 Moderator Action, Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood, Backbone.js App approach not very scalable - nested views, jQuery toggle sort order and save to variable, Better way to check if Javascript Date object exists, Deserialize an email header into key-value pairs, Generate URLs from a complex JSON object using recursion, Reduce array of objects into object of arrays, JavaScript implementation of PHP's array_intersect_key(). To learn more, see our tips on writing great answers. Adding dynamic properties to object only if the name is defined, Conditional adding object property in JavaScript. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing, @VLAZ that doesn't work, you'd have to wrap a in an object. How can I delete in Vim all text from current cursor position line to end of file without using End key? Connect and share knowledge within a single location that is structured and easy to search. I'm building a website builder application using React and XState. Can you legally have an (unloaded) black powder revolver in your carry-on luggage? The logical OR assignment (x ||= y) operator only assigns if x is falsy. It is an unnecessary overhead. 3 Answers Sorted by: 62 You could use Object.assign in combination with the ternary operator: let data = Object.assign ( {}, first === null ? Note that this returns true for non-string inputs, which might not be what you want if you wanted to throw an error for an unexpected input type. You should use Object.prototype.isNullOrEmpty = function() { alert(this) }. Also, I'd say you should make sure your functions never return more error/failure values than you are interested in differentiating between. How well informed are the Russian public about the recent Wagner mutiny? What steps should I take when contacting another researcher after finding possible errors in their work? Instead of destructuring all the individual properties, you can extract just the id and leave the .rest. 2 min read To set a default value only in case of a nullish value (i.e. Does new React Context API trigger re-renders? Just now I had to do --. How can i make it. @ndp, Great answer! How to get around passing a variable into an ISR. I have a parent component (SkinsController) that uses a state machine (bookmarkMachine) to manage the state of bookmarks.I also have a child component (Editor) that has its own state machine (editorMachine) and is used to edit the properties of a bookmark.When a user saves their changes in the Editor, I want to send an event to . By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. How do I prevent properties from being added to an empty object in TypeScript? (typeof value === "string" && value.length > 0); } This checks if the type of the value is "string" (and thus non-null and not undefined), and if it is not empty. For some strings, you use single quotes and for others, you use double quotes. Please show your love and support by sharing this post. - What is the difference? For example, if the distinction between. Using coercion is not evil as many might suggest. @Skarven this is a lot better. Temporary policy: Generative AI (e.g., ChatGPT) is banned, How to set a variable in an JSON array only when it is not null, Conditional concatenation in modern JavaScript. I'm building a website builder application using React and XState. Does Pre-Print compromise anonymity for a later peer-review? NOTE: This will not work if the value is falsey. It is used to indicate that a variable or object does not currently have a value assigned to it. var A; var B = null; var C = "test"; console.log("is A nullOrEmpty %o", !A); console.log("is B nullOrEmpty %o", !B); console.log("is C nullOrEmpty %o", !C); But if someone passes it as a boolean value of false, then it might return the false positive. To learn more, see our tips on writing great answers. 584), Improving the developer experience in the energy sector, Statement from SO: June 5, 2023 Moderator Action, Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood. They don't like my videos vs None of them like my videos. I also have a child component (Editor) that has its own state machine (editorMachine) and is used to edit the properties of a bookmark. 584), Improving the developer experience in the energy sector, Statement from SO: June 5, 2023 Moderator Action, Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood. operator, SyntaxError: redeclaration of formal parameter "x". Often I have several named variable, and I want to put them into an object if they are not null or undefined. You can then filter this rest object for null properties. Thanks for contributing an answer to Stack Overflow! Now as I said, there's no optimal way of doing this, because while the you can use the logical ?? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. All Rights Reserved. How can I delete in Vim all text from current cursor position line to end of file without using End key? Where in the Andean Road System was this picture taken? How to skip a value in a \foreach in TikZ? Aren't the first checks redundant after you've already tried to call. Connect and share knowledge within a single location that is structured and easy to search. Can you legally have an (unloaded) black powder revolver in your carry-on luggage? But it is so verbose. in Latin? Making statements based on opinion; back them up with references or personal experience. index.js let val = null; val ? Use MathJax to format equations. In your first example, you check to see that the return value of getQuery isn't "undefined" and that it isn't "". But I would still like to see some context. Would limited super-speed be useful in fencing? Javascript array push only if value not null, The cofounder of Chef is cooking up a less painful DevOps (Ep. undefined in case of blank content, ? // Logs nothing. ?= should be used instead. I suppose this is the most efficient solution. Learn more about Stack Overflow the company, and our products. rev2023.6.28.43514. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. 584), Improving the developer experience in the energy sector, Statement from SO: June 5, 2023 Moderator Action, Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood.

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