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mkdir's “-p” option

... directory. d (delete) Allows one to remove files and sub-directories from a directory. a (administer) Allows one to change a directory's ACL. The owner of a directory can always change the ACL of a directory that s/he owns, along with the ACLs of any subdirectories in that directory. Fi...
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OpenShift rhc setup using multiple accounts

... 2) Run "rhc setup -l LOGIN" between the sessions. Once done managing apps from one account you can end the session for it by running "rhc account logout". rhc setup -l <login1> # First account's login rhc app create <appname> <cartridge> rhc logout rhc setup -l <login2> # ...
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Programmatically go back to the previous fragment in the backstack

...e getFragmentManager().popBackStack() methods (there are several to choose from) http://developer.android.com/reference/android/app/FragmentManager.html#popBackStack() share | improve this answer ...
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What is the rationale for fread/fwrite taking size and count as arguments?

...character encodings like UTF-8. The SUS notes that this is actually taken from the ISO C documents. share | improve this answer | follow | ...
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Unable to install Maven on Windows: “JAVA_HOME is set to an invalid directory”

... the home directory for your Java installation. If you are executing Java from "E:\Sun\SDK\jdk\bin", then the JAVA_HOME variable needs to point to "E:\Sun\SDK\jdk". NB: JAVA_HOME should NOT end with "\bin"1. Make sure that you haven't put a semicolon in the JAVA_HOME variable2. NB: JAVA_HOME shoul...
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Google Authenticator implementation in Python

...Unix timestamp in any given moment in time). Make sure to protect yourself from brute-force attack. If time-based password is used, then trying 1000000 values in less than 30 seconds gives 100% chance of guessing the password. In case of HMAC-based passowrds (HOTPs) it seems to be even worse. Exam...
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How do I create some kind of table of content in GitHub wiki?

...r README.md file Note that this bash implementation only works on Linux (from what I can tell). As a side note, there is a golang implementation and is probably more of a hassle to get working. share | ...
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Why is NaN not equal to NaN? [duplicate]

...c then you could get wildly incorrect (or worse: subtly incorrect) results from your calculations with no obvious indicator as to why. There are also really good reasons for NaNs in calculations when probing the value of a mathematical function; one of the examples given in the linked document is ...
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Python, creating objects

...ive me a correct answer so I'm assuming I need to implement what I learned from classes and instances – Mohsen M. Alrasheed Feb 26 '13 at 5:03 1 ...
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Can I target all tags with a single selector?

... For those landing here from google, and wondering what a comma-separated list means in CSS, it's the first example OP gave. That is, h1, h2, h3 {}. – bluesmonk May 29 '19 at 17:47 ...