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Check if Python Package is installed
What's a good way to check if a package is installed while within a Python script? I know it's easy from the interpreter, but I need to do it within a script.
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How do you share constants in NodeJS modules?
...mply need to require the file, and not even save your return value.
But really, you shouldn't do that. Keeping things properly encapsulated is a good thing. You have the right idea already, so keep doing what you're doing.
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How to enable CORS in AngularJs
... POSTMAN, but when I try to GET from https://www.google.com using an AJAX call I get the CORS error? Is there no way I can make the AJAX call behave similarly to the call from POSTMAN?
– AjaxLeung
Jan 27 '16 at 17:14
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how does Array.prototype.slice.call() work?
...ay, but I don't understand what happens when using Array.prototype.slice.call(arguments)
13 Answers
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Functional programming vs Object Oriented programming [closed]
...zations (new operations on things). Compilation and translation more generally are "killer apps" for functional languages.
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Listing each branch and its last revision's date in Git
... And faster.
See also "Name only option for git branch --list?"
More generally, tripleee reminds us in the comments:
Prefer modern $(command substitution) syntax over obsolescent backtick syntax.
(I illustrated that point in 2014 with "What is the difference between $(command) and `com...
How to change current working directory using a batch file
...st like the commands themselves (CD = cd). I believe that is also true for all external Windows command-line utilities (like FINDSTR, SORT etc.) Third-party tools, on the other hand, can use case-sensitive parameters.
– Andriy M
Feb 28 '17 at 13:36
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Difference between wait and sleep
... process ID or a job specification; if a
job spec is given, all processes in that job's pipeline are
waited for. If n is not given, all currently active child pro-
cesses are waited for, and the return status is zero. If n
specifies a non-existent proc...
The located assembly's manifest definition does not match the assembly reference
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edited Feb 22 at 1:13
Callum Watkins
2,22222 gold badges2323 silver badges4040 bronze badges
answered Oct 18 '08 at 13:39
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How to use ConcurrentLinkedQueue?
...lready in ConcurrentLinkedQueue, just use them. ConcurrentLinkedQueue does all the locking and other operations you need internally; your producer(s) adds data into the queue, and your consumers poll for it.
First, create your queue:
Queue<YourObject> queue = new ConcurrentLinkedQueue<YourO...