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Check if a given key already exists in a dictionary
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You don't have to call keys:
if 'key1' in dict:
print("blah")
else:
print("boo")
That will be much faster as it uses the dictionary's hashing as opposed to doing a linear search, which calling keys would do.
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Failed to load resource: net::ERR_INSECURE_RESPONSE
... access looks sketchy, but its ok trust me. I wrote you both, You're technically code brothers/sisters/gender neutral siblings" ?
– discodane
Dec 4 '15 at 18:41
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What is “overhead”?
...memory overhead, whereas an array can potentially have 0% overhead.
Method call overhead: A well-designed program is broken down into lots of short methods. But each method call requires setting up a stack frame, copying parameters and a return address. This represents CPU overhead compared to a pro...
Disable mouse scroll wheel zoom on embedded Google Maps
...gt;</div>
<iframe src="https://mapsengine.google.com/map/embed?mid=some_map_id" width="640" height="480"></iframe>
</html>
In my CSS i created the class:
.overlay {
background:transparent;
position:relative;
width:640px;
height:480px; /* your iframe height ...
In Node.js, how do I “include” functions from my other files?
Let's say I have a file called app.js. Pretty simple:
26 Answers
26
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Fluid width with equally spaced DIVs
I have a fluid width container DIV.
7 Answers
7
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Generate random string/characters in JavaScript
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I think this will work for you:
function makeid(length) {
var result = '';
var characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
var charactersLength = characters.length;
for ( var i = 0; i < length; i++ ) ...
Convert a list of objects to an array of one of the object's properties
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fantastic solution. I wanted to access the String "id" in my Object-List. Worked perfect List<String> somestringlist = myobjectlist.Select(x => x.id).ToList();
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Aggregate / summarize multiple variables per group (e.g. sum, mean)
...reshape2 package for this task:
require(reshape2)
df_melt <- melt(df1, id = c("date", "year", "month"))
dcast(df_melt, year + month ~ variable, sum)
# year month x1 x2
1 2000 1 -80.83405 -224.9540159
2 2000 2 -223.76331 -288.2418017
3 2000 3 -188.83930 -481.560...
Alternatives to dispatch_get_current_queue() for completion blocks in iOS 6?
...nd, while the completion block should run in whatever queue the method was called.
7 Answers
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