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How to test if a string is JSON or not?
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Read the second paragraph that starts with "JSON is built on two structures..." @ json.org or 4th and 5th paragraphs of ecma-international.org/publications/files/ECMA-ST/ECMA-404.pdf
– Onur Yıldırım
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When to Redis? When to MongoDB? [closed]
...eed to build a prototype without worrying too much about your DB.
Further reading:
Interesting aspects to consider when using Redis as a primary data store
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edited Ma...
How to compare strings in Bash
...you want to do something when they don't match, replace = with !=. You can read more about string operations and arithmetic operations in their respective documentation.
Why do we use quotes around $x?
You want the quotes around $x, because if it is empty, your Bash script encounters a syntax erro...
Setting environment variables on OS X
...ou want it to pick up the changed environment.
This includes any shells already running under Terminal.app, although if you're there you can set the environment more directly, e.g. with export PATH=/opt/local/bin:/opt/local/sbin:$PATH for bash or zsh.
How to keeping changes after a reboot
To keep...
Enum type constraints in C# [duplicate]
...(k))
Console.WriteLine(" {0} same as {1} Or {2}: {3} ", IO.FileAccess.ReadWrite, IO.FileAccess.Read, IO.FileAccess.Write, _
Enums.HasFlags(IO.FileAccess.ReadWrite, IO.FileAccess.Read Or IO.FileAccess.Write))
' These fail to compile as expected:
'Console.WriteLine(...
Why is “import *” bad?
...rted and can't easily find from which module a certain thing was imported (readability).
Because you can't use cool tools like pyflakes to statically detect errors in your code.
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What's a monitor in Java?
...nism to control concurrent access to an object.
This allows you to do:
Thread 1:
public void a()
{
synchronized(someObject) {
// do something (1)
}
}
Thread 2:
public void b()
{
synchronized(someObject) {
// do something else (2)
}
}
This prevents Threads 1 an...
How do I flush the PRINT buffer in TSQL?
... the definitive source on SQL Server Error handling and definitely worth a read:
http://www.sommarskog.se/error-handling-I.html
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How to delete and replace last line in the terminal using bash?
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echo a carriage return with \r
seq 1 1000000 | while read i; do echo -en "\r$i"; done
from man echo:
-n do not output the trailing newline
-e enable interpretation of backslash escapes
\r carriage return
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How to send a JSON object over Request with Android?
...TP Client. Here's a code sample on how to do it. You should create a new thread for network activities so as not to lock up the UI thread.
protected void sendJson(final String email, final String pwd) {
Thread t = new Thread() {
public void run() {
Looper.pr...