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  • Why does Javascript's OR return a value other than true/false?

    - by Fletcher Moore
    I saw this construction in order to get the browser viewport width: function () { return window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth; } I understand the browser quirks involved. What I don't understand is why || returns the value. So I tried this alert(undefined || 0 || 3); and sure enough, it alerts 3. I find this bizarre, because I expect true or false. Could anyone explain what's going on?

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  • How can I tweak this elisp function to distinguish between C-d & DEL?

    - by Fletcher Moore
    Here's my current function (blindly copy-pasted from a website) (defun tweakemacs-delete-one-line () "Delete current line." (interactive) (beginning-of-line) (kill-line) (kill-line)) (global-set-key (kbd "C-d") 'tweakemacs-delete-one-line) There are two quirks here that I want to get rid of. 1) This actually rebinds DEL to the same function. I want my DEL to remain "delete one character". 2) There needs to be a condition where it will not double-kill if the line is only a newline character.

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  • Is there a way to get photo tags and new friendship type events by querying the FQL stream table?

    - by Fletcher Moore
    When you look at your stream on the Facebook website, events such as "FriendX was tagged in an album", "FriendY is attending EventZ", and "FriendK and FriendL are now friends". I've tried various "vague" queries on the stream table, and so far I have been unable to get these types of events. Is this possible, or do I need to query the all of the other tables and write a ton of logic to try to figure out which new events to show and how to show them?

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  • How do you design a database to allow fast multicolumn searching?

    - by Fletcher Moore
    I am creating a real estate search from RETS data, but this is a general question. When you have a variety of columns that you would like the user to be able to filter their search result by, how do you optimize this? For example, http://www.charlestonrealestateguide.com/listings.php has 16 or so optional filters. Granted, he only has up to 11,000 entries (I have the same data), but I don't imagine the search is performed with just a giant WHERE AND AND AND ... clause. Or is this typically accomplished with one giant multicolumn index? Newegg, Amazon, and countless others also have cool & fast filtering systems for large amounts of data. How do they do it? And is there a database optimization reason for the tendency to provide ranges instead of empty inputs, or is that merely for user convenience?

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  • jQuery multiple selectors into dynamic attribute

    - by Jason Fletcher
    I am trying to attach an event to a separate onhover trigger. But I am having problems using multiple selectors since its dynamic. Need help ::: Upon hovering on the yellow box named 'Rings', this should trigger the animated slide event for the green box above it. http://home.jasonfletcher.info/all/alliteration/index.html $('.boxgrid1').hover(function(){ $(".cover", this).stop().animate({top:'0px'},{queue:false,duration:300}); }, function() { $(".cover", this).stop().animate({top:'247px'},{queue:false,duration:300}); });

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  • How do you add objects to a javascript namespace?

    - by Fletcher Moore
    var Test = (function() { return { useSub: function () { this.Sub.sayHi(); }, init: function () { $(document).ready(this.useSub); } }; })(); Test.Sub = (function () { return { sayHi: function () { alert('hi'); } }; })(); Test.useSub(); // works Test.init(); // explodes Above I am trying to create a Test namespace and add an object Sub to it. I was doing fine until I tried using the object in jQuery. The error is "Uncaught TypeError: Cannot call method 'sayHi' of undefined". If there is a better way to do this, I am open to it.

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  • Is there a Javascript library for editing PDFs?

    - by Fletcher Moore
    Based on my Google and stackoverflow search I'm guessing no, but it can't hurt to ask. The goal is: store some blank forms on my server. Then present these to the user, who edits the form in the browser with Javascript and submits the form back to the server. The client wants to reuse parts of an old system (the forms) in which users would download an editable PDF, edit it, and email it back to a secretary. Our users aren't very computer savvy and many don't realize they need to email the forms back, assuming instead the forms somehow get submitted when they save their local changes (or something). I haven't seen the forms yet, so I cannot assess the viability of an alternative.

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  • Why might my PHP log file not entirely be text?

    - by Fletcher Moore
    I'm trying to debug a plugin-bloated Wordpress installation; so I've added a very simple homebrew logger that records all the callbacks, which are basically listed in a single, ultimately 250+ row multidimensional array in Wordpress (I can't use print_r() because I need to catch them right before they are called). My logger line is $logger->log("\t" . $callback . "\n"); The logger produces a dandy text file in normal situations, but at two points during this particular task it is adding something which causes my log file to no longer be encoded properly. Gedit (I'm on Ubuntu) won't open the file, claiming to not understand the encoding. In vim, the culprit corrupt callback (which I could not find in the debugger, looking at the array) is about in the middle and printed as ^@lambda_546 and at the end of file there's this cute guy ^M. The ^M and ^@ are blue in my vim, which has no color theme set for .txt files. I don't know what it means. I tried adding an is_string($callback) condition, but I get the same results. Any ideas?

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  • Why might my Emacs use spaces instead of tabs?

    - by Fletcher Moore
    I am trying to diagnose this problem. TAB creates 4 spaces instead of a 4 col TAB like I want. But I don't think it should because C-h v indent-tabs-mode on the buffer in question says it is set to t. When I check my keybindings, TAB is set to c-indent-line-or-region. Does this function ignore my tabs-mode?

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  • How to avoid nested functions when using AJAX?

    - by Fletcher Moore
    Sequential Asynchronous calls are gross. Is there a more readable solution? The problem is this is hard to follow: ajaxOne(function() { // do something ajaxTwo(function() { // do something ajaxThree() }); }); where the anonymous functions are callbacks that are called on server response. I'm using a third party API to make the AJAX calls, so I need a generic solution.

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  • Is there any difference between var name = function() {} & function name() {} in Javascript?

    - by Fletcher Moore
    Suppose we are inside a function and not in the global namespace. function someGlobalFunction() { var utilFunction1 = function() { } function utilFunction2 () { } utilFunction1(); utilFunction2(); } Are these synonymous? And do these functions completely cease to exist when someGlobalFunction returns? Should I prefer one or the other for readability or some other reason?

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  • IE8 disappearing image bug

    - by Joe Fletcher
    In IE8 (& maybe others), when I leave my page to go to another tab in IE and then come back to my page's tab, each time the cursor runs over an image it disappears until I refresh the page. I've heard of disappearing image bugs, but I couldn't find anything on this particular case, especially given this isn't a weird pre-IE8 bug. I am using a lightbox, so possibly something to do with javascript? http://dev.bwmsnow.co.nz/snowboarding

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  • links for 2010-12-08

    - by Bob Rhubart
    Rittman Mead Consulting Blog Archive Oracle BI EE 11g &#8211; Managing Host Name Changes Rittman Mead's Venkatakrishnan J (an Oracle ACE) looks at "how we can go about getting BI EE 11g to work when the Host Name of the machine changes post install and configuration."  (tags: oracle businessintelligence obiee) Evident Software's CTO and co-founder discusses Oracle Coherence (Application Grid) (tags: oracle successcast podcast coherence grid) Choice Hotels' Rain Fletcher talks WebLogic Server (Application Grid) (tags: oracle successcast weblogic podcast) Baz Khuti, CTO of Avocent discusses their next generation application and WebLogic (Application Grid) (tags: oracle successcast podcast) Oracle Counts Clouds | JAVA Developer's Journal "The Independent Oracle Users Group (IOUG), which has 20,000 members, has run up an Oracle-sponsored survey that found significant cloud adoption by Oracle users."  (tags: oracle cloud survey ioug) Oracle Customers Warm to the Cloud | CTO Edge "The Independent Oracle Users Group (IOUG) has published the results of a study on cloud adoption and, to no surprise, the enterprise loves the cloud. " (tags: oracle cloud ioug survey)

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