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When to use IComparable Vs. IComparer
...<T> also allows you to have a class for each type of sort you want. Example; PersonLastFirstNameComparer, PersonFirstLastNameComparer, or PersonAgeComparer.
– Eric Schneider
Mar 18 '10 at 21:32
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Eclipse hangs at the Android SDK Content Loader
I've been working with Eclipse 4.2 (Juno release 20120920-0800) on OS X 10.8.2 for a few weeks now, building apps for Android 3.0 and above. I have a quad core i7 MacBook Pro with an SSD, so performance is not an issue. Everything was fine.
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Replace all elements of Python NumPy Array that are greater than some value
...stest and most concise way to do this is to use NumPy's built-in Fancy indexing. If you have an ndarray named arr, you can replace all elements >255 with a value x as follows:
arr[arr > 255] = x
I ran this on my machine with a 500 x 500 random matrix, replacing all values >0.5 with 5, an...
How do I edit /etc/sudoers from a script?
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This is a great answer. The whole subshell should be executed as root, e.g. echo "$USER ALL=NOPASSWD:/usr/bin/rsync" | (sudo su -c 'EDITOR="tee" visudo -f /etc/sudoers.d/rsync').
– simon
Aug 19 '15 at 21:58
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SQL how to make null values come last when sorting ascending
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Note however that if you place an index on the sort column to improve performance(*), then this method will somewhat complicate the query plan and lose much of the performance benefit. * - indexes provided the data presorted, hence avoiding a sort per query execu...
How to compare Lists in Unit Testing
... collections, you should use CollectionAssert:
CollectionAssert.AreEqual(expected, actual);
List<T> doesn't override Equals, so if Assert.AreEqual just calls Equals, it will end up using reference equality.
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Rails Object to hash
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Don't use this when looping, Expensive method. Go with as_json
– AnkitG
Jul 10 '13 at 8:07
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Too many 'if' statements?
The following code does work how I need it to, but it's ugly, excessive or a number of other things. I've looked at formulas and attempted to write a few solutions, but I end up with a similar amount of statements.
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How to exit if a command failed?
I am a noob in shell-scripting. I want to print a message and exit my script if a command fails. I've tried:
8 Answers
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