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What is the colon operator in Ruby?
..." # false
:foo.equal? :foo # true
This makes comparing two symbols really fast (since only a pointer comparison is involved, as opposed to comparing all the characters like you would in a string), plus you won't have a zillion copies of the same symbol floating about.
Also, unlike strings, sy...
Any way to replace characters on Swift String?
...n leaves me with and optional string. Original String looks like this: "x86_64" and the new mapping looks like "Optional([\"x\", \"8\", \"6\", \"_\", \"6\", \"4\"])"
– John Shelley
Oct 19 '15 at 15:07
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'Java' is not recognized as an internal or external command
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You need to configure your environment variables, JAVA_HOME and PATH.
JAVA_HOME must contain the path to java, and you should add %JAVA_HOME%\bin to PATH
Alternatively, you can simply add to your PATH the whole path to the bin folder, without the JAVA_HOME variable, however, t...
Find region from within an EC2 instance
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If this is in a bootscript, the metadata service may not be instantiated yet - if so, wait and try again. I've seen it take 10-15 seconds after boot for the metadata location to become available.
– vacri
Mar 27 '18 at 3:46
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Free FTP Library [closed]
... It's under LGPL license. So if you're developing commercial product/service you're opening that can of worms of what you can do and what you can't, what to include, etc. And multiple answers on SO and others give different opinions on that matter...
– Oleksii Vynnychenko...
Create directories using make file
...ssuming a Unix-like environment.
MKDIR_P = mkdir -p
.PHONY: directories
all: directories program
directories: ${OUT_DIR}
${OUT_DIR}:
${MKDIR_P} ${OUT_DIR}
This would have to be run in the top-level directory - or the definition of ${OUT_DIR} would have to be correct relative to where ...
Mockito. Verify method arguments
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Important: Call verify()/capture() after using the mock. I was thinking it has to be "installed" before...
– Daniel Alder
Feb 21 '18 at 16:02
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Why is the gets function so dangerous that it should not be used?
...icial part of the language up to the 1999 ISO C standard, but
it was officially removed by the 2011 standard. Most C implementations still support it, but at least gcc issues a warning for any code that uses it.
share
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How to remove item from array by value? [duplicate]
...is can be a global function or a method of a custom object, if you aren't allowed to add to native prototypes. It removes all of the items from the array that match any of the arguments.
Array.prototype.remove = function() {
var what, a = arguments, L = a.length, ax;
while (L && th...
SQL Server 2008: how do I grant privileges to a username?
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