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MySQL select 10 random rows from 600K rows fast
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Yes, if you have potentially big gaps in ID's then the chance of your lowest ID's being picked randomly is much lower than your high IDs. In fact the chance that the first ID after the biggest gap getting picked is actually the highest. Therefore th...
Firebug says “No Javascript on this page”, even though JavaScript does exist on the page
... 'debugger' option. See this page for a discussion on the migration. Read all the posts dated 19 November for further information.
It seems to me that the option gives less functionality but Firebug per se is never going to be fixed for Firefox 50 and beyond
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Default argument values in JavaScript functions [duplicate]
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In javascript you can call a function (even if it has parameters) without parameters.
So you can add default values like this:
function func(a, b){
if (typeof(a)==='undefined') a = 10;
if (typeof(b)==='undefined') b = 20;
//your code
}
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Tetris-ing an array
...a include the algorithm to find the longest common prefix, thus making actually using a tree structure unnecessary? Ie why check the tree for multiple children when you could detect that while building the tree. Why then a tree at all? I mean if you start with an array already. If you can change the...
Get current date/time in seconds
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@Nick - I think all examples are necessarily speculative and will sound contrived - but I'll take a shot :) Suppose you have data time stamped with unix time, and want to determine it's age. More though I think this is what is most likely me...
git add all except ignoring files in .gitignore file
...roject that had none. The problem is that there are a lot of files to initially add to git with a .gitignore file, but I can't figure out how to add all files without including the files matching something in the .gitignore file.
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Regex select all text between tags
What is the best way to select all the text between 2 tags - ex: the text between all the 'pre' tags on the page.
17 Answe...
How can I find an element by CSS class with XPath?
.../div[contains(concat(' ', @class, ' '), ' Test ')]
If you wished to be really certain that it will match correctly, you could also use the normalize-space function to clean up stray whitespace characters around the class name (as mentioned by @Terry):
//div[contains(concat(' ', normalize-space(@...
Stretch and scale a CSS image in the background - with CSS only
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CSS3 has a nice little attribute called background-size:cover.
This scales the image so that the background area is completely covered by the background image while maintaining the aspect ratio. The entire area will be covered. However, part of the image may...
Shrink a YouTube video to responsive width
...be videos or is there something that I can add to the code to make it go smaller?
10 Answers
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