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Merge and interleave two arrays in Ruby
... that Chris wants to interleave the elements, not concatenate them. Essentially, he wants [a, s].transpose except that the two rows don't conform, leaving #zip as the obvious solution. And I don't believe he meant that he really cared whether a was mutated ... I don't think he was commenting on a mu...
abort, terminate or exit?
What's the difference between those three, and how shall I end program in case of exception which I can't handle properly?
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扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...RACT
MIT App Inventor is a block-based event-driven programming tool that allows everyone, especially novices, to start programming and building fully functional apps for Android devices. Compared to traditional text programming with Android Studio, it has limited features. We enabled App Inventor ...
How to work with Git branches and Rails migrations
...s and many of them include db migrations. We try to be careful but occasionally some piece of code in master asks for a column that got removed/renamed in another branch.
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How to define a two-dimensional array?
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You're technically trying to index an uninitialized array. You have to first initialize the outer list with lists before adding items; Python calls this
"list comprehension".
# Creates a list containing 5 lists, each of 8 items, all set t...
How can I get the MD5 fingerprint from Java's keytool, not only SHA-1?
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With JDK 1.7 installed, keytool always outputs by default SHA1 fingerprint, not MD5.
you can get the MD5 Certificate by adding -v option.
use the following code:-
C:\Program Files\Java\jdk1.7.0\bin>keytool -v -list -alias
androiddebugke...
java.net.ConnectException: Connection refused
...ing this error. after reading a lot from the buddy WEB, I then closed out all the simulators and eclipse, killed the ADP in the task manager and then restarted the Eclipse and everything is started working properly. I think when you have multiple simulators running and then you try to connect devi...
Should I index a bit field in SQL Server?
...ng a field with low cardinality (a low number of distinct values) is not really worth doing. I admit I don't know enough about how indexes work to understand why that is.
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What is the difference between a “function” and a “procedure”?
Generally speaking, we all hear about the functions or procedures in programming languages. However, I just found out that I use these terms almost interchangeably (which is probably very wrong).
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How to create new tmux session if none exists
...ause with a small tweak this works with named sessions: tmux attach -t some_name || tmux new -s some_name. Change some_name to $1 add a shebang, and save.
– Cheezmeister
Jan 9 '14 at 4:48
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