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How using try catch for exception handling is best practice
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Best practice is that exception handling should never hide issues. This means that try-catch blocks should be extremely rare.
There are 3 circumstances where using a try-catch makes sense.
Always deal with known exceptions as low-down as you can. However, if you're expecting an exception it's ...
Oracle Differences between NVL and Coalesce
...:
SELECT SUM(val)
FROM (
SELECT NVL(1, LENGTH(RAWTOHEX(SYS_GUID()))) AS val
FROM dual
CONNECT BY
level <= 10000
)
This runs for almost 0.5 seconds, since it generates SYS_GUID()'s, despite 1 being not a NULL.
SELECT SUM(val)
FROM (
...
How to permanently add a private key with ssh-add on Ubuntu? [closed]
... files to be kept permanently, by adding them in your ~/.ssh/config file:
IdentityFile ~/.ssh/gitHubKey
IdentityFile ~/.ssh/id_rsa_buhlServer
If you do not have a 'config' file in the ~/.ssh directory, then you should create one. It does not need root rights, so simply:
nano ~/.ssh/config
...a...
Subscript and Superscript a String in Android
...ithout an external library? I want this to display in a TextView in Android.
14 Answers
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How to parse a JSON string into JsonNode in Jackson?
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What did passing in JsonNode.class actually get you here?
– David
Oct 24 '13 at 18:10
3
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Can I apply a CSS style to an element name?
...the HTML is not very well labelled, in the sense that there are not enough id and class declarations to differentiate between elements.
...
How do the likely/unlikely macros in the Linux kernel work and what is their benefit?
...a jump instruction. This can be a big win, if the prediction is correct it means that the jump instruction is basically free and will take zero cycles. On the other hand if the prediction is wrong, then it means the processor pipeline needs to be flushed and it can cost several cycles. So long as th...
Mockito.any() pass Interface with Generics
...;>any() - IDE hints me that Explicit type arguments can be inferred. It means that there is no requirement to explicitly define types and ArgumentMatchers.any() will have the same result
– Alex
Sep 9 '19 at 9:11
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Start ssh-agent on login
...${SSH_ENV}" ]; then
. "${SSH_ENV}" > /dev/null
#ps ${SSH_AGENT_PID} doesn't work under cywgin
ps -ef | grep ${SSH_AGENT_PID} | grep ssh-agent$ > /dev/null || {
start_agent;
}
else
start_agent;
fi
This version is especially nice since it will see if you've alre...
How do I list all the columns in a table?
...nstruction but a SQL*Plus command, and as such it doesn't work in most SQL IDEs.
– walen
Dec 13 '18 at 14:29
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