Ben Nadel

Recent Blog Comments By Ben Nadel

• Discriminated Unions Don't Seem To Work In Angular 9.0.0-next.5 When fullTemplateTypeCheck Is Enabled

  Posted on Dec 6, 2019 at 7:15 AM

  @All, So, something I just learned is that you can use $any() within a Component template to side-step type-checking for a given expression: https://www.bennadel.com/blog/3736-using-any-to-temporarily-disable-type-checking-within-a-component-template-in-angular-9-0-0-rc-4.htm This $a... read more »

• The Elvis Operator Can Be Chained Multiple Times In A Single Expression In Lucee CFML 5.3.3.62

  Posted on Dec 5, 2019 at 5:53 AM

  @Ben, Sorry, I think I have to amend that last comment. I am not sure that it exists in TypeScript -- but it can be used in parts of Angular (in its templates). But, I think that is Angular-specific.... read more »

• The Not-So-Dark Art Of Designing Database Indexes: Reflections From An Average Software Engineer

  Posted on Dec 5, 2019 at 5:38 AM

  @Dmitry, Do you have any suggestions on how I could have made it more clear? It's a non-trivial topic to discuss. It's hard to take years of learning and condense it into a single article.... read more »

• The Elvis Operator Can Be Chained Multiple Times In A Single Expression In Lucee CFML 5.3.3.62

  Posted on Dec 5, 2019 at 5:16 AM

  @Charles, I believe that it is in Adobe ColdFusion as well. But, I'm not 100% sure on that. It also exists in TypeScript.... read more »

• The Elvis Operator Can Be Chained Multiple Times In A Single Expression In Lucee CFML 5.3.3.62

  Posted on Dec 4, 2019 at 4:58 PM

  @Charles, That's exactly right. ?. is the Safe-Navigation operator, which will traverse the given path/property and return null if the given value does not exist. You can think of it like this -- a?.b -- is akin to: try { return( a.b ); } catch ( any error ) { return( null ); ... read more »

• Fixing Connection Failure: Unable To Determine MIME Type Errors With sslCertificateInstall() In Lucee CFML 5.3.3.62

  Posted on Dec 4, 2019 at 7:22 AM

  @Charles, In my personal life, I used "managed hosting", so having someone install SSL certs for me is part of the cost. And, at work, we have Ops people who deal with all the SSL stuff. So, I literally know nothing about installing SSL certs :P Well, that's not entirely fair... read more »

• Using The OWASP AntiSamy 1.5.7 Project With ColdFusion 10 To Sanitize HTML Input And Help Prevent XSS Attacks

  Posted on Dec 4, 2019 at 6:46 AM

  @Sebastiaan, 100%. Everything is easy-peasy when all you want to do is escape all of the user input - then all the encodeForHtml() methods, and related, work like a charm. The real issue comes about when you want to allow some markup , but escape most markup . So, for example, lett... read more »

• Using Dynamic Template-Driven Forms In Angular 7.2.7

  Posted on Dec 4, 2019 at 6:42 AM

  @Prem, That's a strange behavior. Is that something you can replicate in my demo? I just tried to Add several pets (in the demo), then remove the first one, and add some more - they all seem to show up. Without knowing more about your issue, I am wondering if you are using the ngFor index ... read more »

• Uploading Files With HttpClient In Angular 7.2.11

  Posted on Dec 4, 2019 at 6:36 AM

  @Michael, To be honest, I've never actually done that before -- save incomplete form data for later user. But, my first instinct would be to save it in LocalStorage . If you've read that LocalStorage is not the best idea, it is likely due to the longevity of it (which is a potential s... read more »

• Rendering A List Of Mixed Components Using NgFor And NgSwitch In Angular 7.2.13

  Posted on Dec 4, 2019 at 6:20 AM

  @Joseph, The best bet might be to create separate components for each Type, and then just pass the list-item into the component as an input bindings. This way, you can sort of push the type differentiation down into the various component implementations. I think Angular would be OK with th... read more »

• Rendering A List Of Mixed Components Using NgFor And NgSwitch In Angular 7.2.13

  Posted on Dec 4, 2019 at 6:18 AM

  @Joseph, Yeah, I think I ran into this same issue as well - it seems that Discriminated Unions don't work well in the template: https://www.bennadel.com/blog/3696-discriminated-unions-don-t-seem-to-work-in-angular-9-0-0-next-5-when-fulltemplatetypecheck-is-enabled.htm I "worked aro... read more »

• Fixing Connection Failure: Unable To Determine MIME Type Errors With sslCertificateInstall() In Lucee CFML 5.3.3.62

  Posted on Dec 4, 2019 at 6:13 AM

  @Charles, Yeah, I used to do the same kind of thing. I honestly didn't even realize you could install SSL certs in the CF Administrator. I think maybe that is a relatively recent feature (otherwise I just totally missed it). So, I used to have to do it at the command-line in the ColdFusion... read more »

• Monitoring Document And Element Scroll Percentages Using RxJS In Angular 6.0.2

  Posted on Dec 4, 2019 at 6:10 AM

  @SnoopDong, Ha ha, no worries -- happens to the best of us.... read more »

• Uploading Multiple Files In A Single "Form Post" With HttpClient In Angular 7.2.12

  Posted on Dec 4, 2019 at 6:07 AM

  @Shekh, Interesting -- so you're saying that any attempt to send custom HTTP Headers in conjunction with the FormData object will fail to work? I'll have to try that out for myself. That seems like strange behavior.... read more »

• Showing A Loading Indicator For Lazy-Loaded Route Modules In Angular 6.1.7

  Posted on Dec 2, 2019 at 7:15 AM

  @Wendell, Oh, very interesting question! It looks like the RouteConfigLoadStart event type includes a route property: https://angular.io/api/router/RouteConfigLoadStart This route property includes all of the data that was provided at configuration time for the route. So, it s... read more »

• TypeScript And .parentNode vs .parentElement

  Posted on Nov 26, 2019 at 12:53 PM

  @Chris, Hmmm, I am not sure. At the very root of the document, the two are different: document.body.parentElement.parentElemnt => null document.body.parentElement.parentNode => document But, for the most part, if you're working with user-interactions insi... read more »

• Instrumenting ColdFusion And Lucee Code With New Relic's Java Agent

  Posted on Nov 26, 2019 at 7:33 AM

  @All, On a related note, I've recently started to track my feature flag state as custom parameters on my New Relic request transactions: https://www.bennadel.com/blog/3731-tracking-feature-flags-in-new-relic-and-nrql-using-the-java-agent-in-lucee-cfml-5-3-3-62.htm This allows me to pi... read more »

• Customizing A Select Component Using TemplateRef And NgTemplateOutlet In Angular 9.0.0-rc.3

  Posted on Nov 25, 2019 at 4:57 AM

  @Charles, Yep, it's just hiding from you :D There is a (click) on the Option that calls .handleSelect() , which then turns around and calls: this.valueChangeEvents.emit( nextValue ); As far as the notation inside the inputs meta-data, I am just aliasing the input-binding. Meaning... read more »

• Creating A Custom Select Component With The Options-Menu In The Root Stacking Context In Angular 9.0.0-rc.3

  Posted on Nov 24, 2019 at 9:37 AM

  @All, As a tangentially-related follow-up, I revamped this demo to use TemplateRef and NgTemplateOutlet for customization: https://www.bennadel.com/blog/3729-customizing-a-select-component-using-templateref-and-ngtemplateoutlet-in-angular-9-0-0-rc-3.htm This was inspired by a recent... read more »

• Using MySQL's Null-Safe Equality Operator With CFQueryParam's Null Option In Lucee CFML 5.3.3.62

  Posted on Nov 23, 2019 at 7:25 AM

  @Charles, .... what is the advantage of setting an INT column default to NULL? In my opinion, there is no advantage . I think people who care about being "academically correct" like to use this technique because they will argue that an "unknown" value is different... read more »