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Strange, unexpected behavior (disappearing/changing values) when using Hash default value, e.g. Hash
...look more in-depth at why Hash.new([]) doesn’t work:
h = Hash.new([])
h[0] << 'a' #=> ["a"]
h[1] << 'b' #=> ["a", "b"]
h[1] #=> ["a", "b"]
h[0].object_id == h[1].object_id #=> true
h #=> {}
We can see that our default object is being reused and mutated (t...
Replace a value if null or undefined in JavaScript
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Here’s the JavaScript equivalent:
var i = null;
var j = i || 10; //j is now 10
Note that the logical operator || does not return a boolean value but the first value that can be converted to true.
Additionally use an array of objects instead of one single object:
var options = {
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Webdriver Unable to connect to host 127.0.0.1 on port 7055 after 45000 ms
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The problem was resolved by moving from Selenium 2.24.1 to Selenium 2.25.0
As the selenium change is just download the jar file and run it instead of the old one,it's worth trying this as a quick and easy troubleshooter - if it doesn't help, just switch back. In your case, I'm not sure which ver...
MySQL show current connection info
...ther useful functions can be found here: http://dev.mysql.com/doc/refman/5.0/en/information-functions.html
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Matplotlib transparent line plots
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Plain and simple:
plt.plot(x, y, 'r-', alpha=0.7)
(I know I add nothing new, but the straightforward answer should be visible).
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Integer division with remainder in JavaScript?
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1309
For some number y and some divisor x compute the quotient (quotient) and remainder (remainder) ...
How to make jQuery to not round value returned by .width()?
...t was introduced in IE4 and is supported by all browsers:
$("#container")[0].getBoundingClientRect().width
Note: For IE8 and below, see the "Browser Compatibility" notes in the MDN docs.
$("#log").html(
$("#container")[0].getBoundingClientRect().width
);
#container {
background: bl...
How to find where gem files are installed
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10 Answers
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How to tell if a tag failed to load
...d I'd like to be able to tell whether the loading failed in some way -- a 404, a script error in the loaded script, whatever.
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'parent.relativePath' points at my com.mycompany:MyProject instead of org.apache:apache - Why?
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260
Add an empty <relativePath> to <parent> so that it resolves the parent pom from the ...