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sqlalchemy unique across multiple columns
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Extract from the documentation of the Column:
unique – When True, indicates that this column contains a unique
constraint, or if index is True as well, indicates that the Index
should be created with the unique flag. To spe...
RegEx backreferences in IntelliJ
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IntelliJ uses $1 for replacement backreferences.
From IntelliJ's help:
For more information on regular expressions and their syntax, refer to documentation for java.util.regex Back references should have $n, rather than \n format.
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UIView with rounded corners and drop shadow?
...and other properties before calling addShadow.
After that, just call this from viewDidLoad like this:
button.addShadow(offset: CGSize.init(width: 0, height: 3), color: UIColor.black, radius: 2.0, opacity: 0.35)
Final result:
Super easy and simple!
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Cassandra port usage - how are the ports used?
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For posterity, this annoyance should be fixed, from Cassandra 2.0.8 onward according to this ticket. The default cassandra-env.sh now sets the com.sun.management.jmxremote.rmi.port property to the same value as the main JMX port so that random ports are not used.
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Using Ajax.BeginForm with ASP.NET MVC 3 Razor
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David's issue is almost always caused from not including the jqueryval bundle which contains the unobtrusive ajax code. Be very careful with this approach you posted otherwise you'll get one post and then your form is hosed since you've just replaced it. You then...
Save file to specific folder with curl command
In a shell script, I want to download a file from some URL and save it to a specific folder. What is the specific CLI flag I should use to download files to a specific folder with the curl command, or how else do I get that result?
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How do I determine whether an array contains a particular value in Java?
... is roughly constant. At least for arrays up to 2^30. There may be affects from, say, hardware caches which the big-O analysis ignores. Also assumes the hash function is working effectively.
– Tom Hawtin - tackline
Sep 9 '14 at 23:51
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How do I activate C++ 11 in CMake?
...al property CMAKE_CXX_KNOWN_FEATURES lists the C++ features you can choose from.
Instead of using target_compile_features() you can also specify the C++ standard explicitly by setting the CMake properties
CXX_STANDARD
and
CXX_STANDARD_REQUIRED for your CMake target.
See also my more detailed an...
Specifying colClasses in the read.csv
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If you want to refer to names from the header rather than column numbers, you can use something like this:
fname <- "test.csv"
headset <- read.csv(fname, header = TRUE, nrows = 10)
classes <- sapply(headset, class)
classes[names(classes) %in% c(...
What's the best way to bundle static resources in a Go program? [closed]
...int(v)
}
fmt.Println("}")
Example output if the file would contain bytes from 0 to 16 (try it on the Go Playground):
var imgdata = []byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}
Storing as base64 string
If the file is not "too large" (most images/icons qualify), there are other v...