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Boolean literals in PowerShell
...coerces to a boolean value, if the type has to be boolean, e.g. in method calls that require boolean (and have no conflicting overload), or conditional statements. Most non-null objects are true, for example. null, empty strings, empty arrays and the number 0 are false.
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Append values to a set in Python
...dd(onemorevalue)
But, of course, doing it in bulk with a single .update call is faster and handier, when otherwise feasible.
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How can I use Python to get the system hostname?
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@BelowtheRadar don't worry, I usually only call either of these once per script.
– robert
Mar 1 '17 at 11:58
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How can I create a temp file with a specific extension with .NET?
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Guaranteed to be (statistically) unique:
string fileName = System.IO.Path.GetTempPath() + Guid.NewGuid().ToString() + ".csv";
(To quote from the wiki article on the probabilty of a collision:
...one's annual risk of being hit by a
meteorite i...
Scanner vs. StringTokenizer vs. String.Split
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They're essentially horses for courses.
Scanner is designed for cases where you need to parse a string, pulling out data of different types. It's very flexible, but arguably doesn't give you the simplest API for simply getting an array of...
Xcode 5: Code signing entitlement errors
...both rows, however, I saw the "Any iOS SDK" subrows for each configuration all set to None, although the Debug/Release rows did list the proper profile/signing identity. Archiving in this state still gave me the error, until I explicitly set all the "Any iOS SDK" rows to their proper values.
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Git Tag list, display commit sha1 hashes
...t'll show the hash of the tag object itself.
– Lily Ballard
Jan 9 '12 at 23:43
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How to mount a host directory in a Docker container
...MAGE [COMMAND] [ARG...] Run a command in a new container -P, --publish-all=false: Publish all exposed ports to the host interfaces -a, --attach=[]: Attach to stdin, stdout or stderr. -c, --cpu-shares=0: CPU shares (relative weight)
– Kishore Vaishnav
Ma...
How to get the first non-null value in Java?
... the efficiency reasons that i mentioned above is that an array allocation will happen each time you invoke the var arg version of the method. this could be wasteful for hand-fulls of items, which i suspect will be common usage.
– les2
May 4 '10 at 1...
How to get item's position in a list?
...er probably 25 years of questioning functional programming, I think I'm finally getting the clue. list comprehension is da bomb.
– Charlie Martin
Dec 13 '08 at 18:30
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