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Difference between Observer, Pub/Sub, and Data Binding
...implementation for data binding? Ok, here's a stupid one:
a background thread is started that constantly checks the bound property on an object.
if that thread detects that the value of the property has changed since last check, copy the value over to the bound item.
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Select unique or distinct values from a list in UNIX shell script
...nes is small enough (as unique lines are kept in memory). The zsh solution reads the entire file into memory first, which may not be an option with large files. Also, as written, only lines with no embedded spaces are handled correctly; to fix this, use IFS=$'\n' read -d '' -r -A u <file; print -...
Chrome Dev Tools: How to trace network for a link that opens a new tab?
...ck to origin page and hit that link again.
The result will be loaded in already prepared window with developer tools opened.
You can activate "preserve log" option in dev tools (see in Konrad Dzwinel excellent answer) to catch any redirect traffic on that link.
Note : most people familiar with li...
Compiled vs. Interpreted Languages
... instructions are not directly executed by the target machine, but instead read and executed by some other program (which normally is written in the language of the native machine). For example, the same "+" operation would be recognised by the interpreter at run time, which would then call its own ...
Cannot open backup device. Operating System error 5
...r it is "working".
Just a FYI for any other users that come across this thread.
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Difference between Pragma and Cache-Control headers?
I read about Pragma header on Wikipedia which says:
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Git Push ERROR: Repository not found
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Check to see if you have read-write access.
The Git error message is misleading. I had a similar issue. I had been added to an existing project. I cloned it and committed a local change. I went to push and got the ERROR: Repository not found. error ...
Are there pronounceable names for common Haskell operators? [closed]
I'm reading Learn You a Haskell for Great Good , and I never know how to pronounce the Haskell operators. Do they have "real" names? ?
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Shell one liner to prepend to a file
...t;> yourfile) thence writing to that (>&3) seems to overcome the read/write on same file dilemma. Works for me on 600K files with awk. However trying the same trick using 'cat' fails.
Passing the prependage as a variable to awk (-v TEXT="$text") overcomes the literal quotes problem which ...
What is referential transparency?
...uages" is available on the web. It is a beautiful paper and everybody can read and understand it. So, please do so. You will be much enlightened. He introduces the term "referential transparency" in this paragraph:
One of the most useful properties of expressions is that called by Quine refe...