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What's an elegant way to conditionally add a class to an HTML element in a view?
...lly you should represent success with boolean true or a numeric record ID, and failure with boolean false or nil. This way you can just test your variable:
<div class="<%= 'ok' if @success %>">
A second form using the ternary ?: operator is useful if you want to choose between two cl...
How can I count text lines inside an DOM element? Can I?
...using:
var divHeight = document.getElementById('content').offsetHeight;
And divide by the font line height:
document.getElementById('content').style.lineHeight;
Or to get the line height if it hasn't been explicitly set:
var element = document.getElementById('content');
document.defaultView.g...
How do I find a specific table in my EDMX model quickly?
... to find a table in the EDMX model than just scrolling through the diagram and looking for the thing. Our database has around 50 tables in it and when I'm looking for a specific one it's just a chore to see where VS put the thing.
...
How to hash some string with sha256 in Java?
...
You'd basically convert the string into bytes (e.g. using text.getBytes(StandardCharsets.UTF_8)) and then hash the bytes. Note that the result of the hash would also be arbitrary binary data, and if you want to represent that in a string, you should use base64 or hex... don't try to use the String(...
Clean way to launch the web browser from shell script?
...
xdg-open is standardized and should be available in most distributions.
Otherwise:
eval is evil, don't use it.
Quote your variables.
Use the correct test operators in the correct way.
Here is an example:
#!/bin/bash
if which xdg-open...
What goes into the “Controller” in “MVC”?
I think I understand the basic concepts of MVC - the Model contains the data and behaviour of the application, the View is responsible for displaying it to the user and the Controller deals with user input. What I'm uncertain about is exactly what goes in the Controller.
...
What is PAGEIOLATCH_SH wait type in SQL Server?
...;value> order by <PrimaryKey>. We also have an index on just col1 and have tried rebuilding the index.
– Ryan
Mar 9 '09 at 15:36
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Changing the child element's CSS when the parent is hovered
...use CSS?
.parent:hover .child, .parent.hover .child { display: block; }
and then add JS for IE6 (inside a conditional comment for instance) which doesn't support :hover properly:
jQuery('.parent').hover(function () {
jQuery(this).addClass('hover');
}, function () {
jQuery(this).removeCla...
Can I grep only the first n lines of a file?
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Head defaults to printing the first 10 lines to standard output, so this is valid for 10 lines head log.txt | grep <whatever>
– Zlemini
Sep 30 '16 at 12:38
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Load “Vanilla” Javascript Libraries into Node.js
...ry that I found.) But these libraries are just straightforward .js files and not "Node.js libraries".
7 Answers
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