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Centering a background image, using CSS

...hp?ig=6179 I am not sure how to upload images to jsfiddle, if you can help me out there jsfiddle.net/yWrQP – X10nD Apr 15 '10 at 7:52 ...
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Detecting an “invalid date” Date instance in JavaScript

...String.call(d) === "[object Date]") { // it is a date if (isNaN(d.getTime())) { // d.valueOf() could also work // date is not valid } else { // date is valid } } else { // not a date } Update [2018-05-31]: If you are not concerned with Date objects from other JS contexts (extern...
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How do I update/upsert a document in Mongoose?

Perhaps it's the time, perhaps it's me drowning in sparse documentation and not being able to wrap my head around the concept of updating in Mongoose :) ...
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Using Python 3 in virtualenv

... simply run virtualenv -p python3 envname Update after OP's edit: There was a bug in the OP's version of virtualenv, as described here. The problem was fixed by running: pip install --upgrade virtualenv ...
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Convert.ChangeType() fails on Nullable Types

I want to convert a string to an object property value, whose name I have as a string. I am trying to do this like so: 6 An...
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How to check a checkbox in capybara?

... I found the following worked for me: # Check find(:css, "#cityID[value='62']").set(true) # Uncheck find(:css, "#cityID[value='62']").set(false) share | i...
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Check if a number has a decimal place/is a whole number

... != 0 // 23 % 1 = 0 // 23.5 % 1 = 0.5 Note that this is based on the numerical value of the number, regardless of format. It treats numerical strings containing whole numbers with a fixed decimal point the same as integers: '10.0' % 1; // returns 0 10 % 1; // returns 0 '10.5' % 1; // returns 0....
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Java compiler level does not match the version of the installed Java project facet

...project - Click Properties - Click the "Project Facets" option on the left menu - Under Facets section "Java" on the right, change it to "1.6", "1.7" or your version... - Click Ok – Thiago Pereira May 29 '15 at 11:56 ...
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Hidden features of Eclipse [closed]

Alright it can be a lame question, but everybody uses these things differently. What's some of the best time savers out there for this IDE. Tom ...
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How do I inspect the view hierarchy in iOS?

...r app is running to pause execution and inspect the views at the current moment. More info at Apple's documentation. share | improve this answer | follow | ...