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How do I check if the Java JDK is installed on Mac?
...ary/Java/JavaVirtualMachines/
Then run ls command in the terminal again. Now you can see the jdk version & package if exists in your computer.
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What is Mocking?
...ecurity. The machine does this by processing what it sees with its camera.
Now your manager walks in the door and asks you to unit-test it.
Then you as a developer you can either bring 1000 real objects, like a MacBook pro, Google Nexus, a banana, an iPad etc in front of it and test and see if it al...
How to detect first time app launch on an iPhone
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I wrote a tiny library for this very purpose. It lets me know whether this is the first launch ever, or just for this version, and any past versions the user has installed. It's available on github as a cocoapod under the Apache 2 license: GBVersionTracking
You just call this in ap...
Insert into a MySQL table or update if exists
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I know all of you allude to this, but I want to be explicit for others. If the ID you insert is NOT the PRIMARY KEY or UNIQUE, then this will not work. This didn't initially work for me because my ID was not unique.
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Remove Trailing Spaces and Update in Columns in SQL Server
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It should be noted that TRIM is now a supported method in SQL Server 2017+.
– DJ Sipe
Feb 15 '18 at 21:44
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Check if a value exists in pandas dataframe index
... there is an obvious way to do this but cant think of anything slick right now.
6 Answers
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“rm -rf” equivalent for Windows?
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Mystified here. I know that I tried this command and it did not work if there were files in the directory tree; now I go back and . . . magically it seems to work. Does anyone else experience inconsistent behavior with this?!
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Changing default shell in Linux [closed]
...l prompt you to enter your password.
Your default login shell is /bin/bash now. You must log out and log back in to see this change.
The following is quoted from man page:
The chsh command changes the user login shell. This determines the
name
of the users initial login command. A no...
How to hide iOS status bar
...initially hidden = YES
View controller-based status bar appearance = NO
now the status bar will hidden.
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Initial bytes incorrect after Java AES/CBC decryption
...utputs bytes, so does decryption (case in point : the Cipher object does). Now, one particular use case may be to have encrypted bytes coming from a String, or be sent as a String (base64 MIME attachment for a Mail...), but that is an issue of encoding bytes, for which there exists hundreds of solut...