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Using do block vs braces {}
...s of code:
1.upto 3 do |x|
puts x
end
1.upto 3 { |x| puts x }
# SyntaxError: compile error
Second example only works when parentheses is used, 1.upto(3) { |x| puts x }
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What is the difference between ${var}, “$var”, and “${var}” in the Bash shell?
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There is another case: ${var:?}, which will provide error when variable is unset or not set. REF: github.com/koalaman/shellcheck/wiki/SC2154
– Nam Nguyen
Apr 7 '15 at 4:32
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What is state-of-the-art for text rendering in OpenGL as of version 4.1? [closed]
...d). HTH.
– Engineer
Oct 7 '12 at 14:05
1
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Why is String immutable in Java?
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The DZone article contains major errors about the operation of the Strign pool. It is only for constants. Ergo the stated rationale is invalid.
– Marquis of Lorne
Feb 13 '19 at 9:51
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PostgreSQL: Is it better to use multiple databases with one schema each, or one database with multip
...e with more than 3000 schemas and pg_dump just fails with an out of memory error if you try to dump a single schema. I wonder if this would be any different had I 3000 databases instead.
– Machisuji
Feb 6 '17 at 13:41
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Defining custom attrs
...-auto"
Otherwise the application that uses the library will have runtime errors.
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When is it appropriate to use UDP instead of TCP? [closed]
...ared to handle these complications somehow, likely using retransmission or error correcting codes.
The result is that UDP can:
Achieve higher throughput than TCP as long as the network drop rate is within limits that the application can handle.
Deliver packets faster than TCP with less delay.
Set...
My Understanding of HTTP Polling, Long Polling, HTTP Streaming and WebSockets
...ot.
– Software Guy
Sep 23 '12 at 21:05
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@SoftwareGuy. Many reasons. On recent browsers, you can ...
Configuring Log4j Loggers Programmatically
...r all other log levels your want to handle.
// You mentioned TRACE and ERROR.
private static void log(LogLevel level, String logMsg) {
if(!loggingIsInitialized)
initLogging();
org.slf4j.Logger slf4jLogger = org.slf4j.LoggerFactory.getLogger("DebugLogger");
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SVN how to resolve new tree conflicts when file is added on two branches
...ed the trunk changes originally), try to update it, and now get a checksum error on the files in question. Blow the directory in question away, get a new version via update, and finally I have what should be a good version of branch2 with the trunk changes. I hope. Caveat developer.
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