大约有 2,700 项符合查询结果（耗时：0.0142秒） [XML]
Node.js setting up environment specific configs to be used with everyauth
...
Example: on my machine the .env file is this:
NODE_ENV=dev
TWITTER_AUTH_TOKEN=something-needed-for-api-calls
My local .env overrides any environment variables. But on the staging or production servers (maybe they're on heroku.com) the environment variables are pre-set to stage NODE_ENV=stage or...
What is the use case of noop [:] in bash?
...causes bash to give a syntax error:
line 4: syntax error near unexpected token `fi'
line 4: `fi'
Bash can't have empty blocks (WTF). So you add a no-op:
if [ "$foo" != "1" ]
then
#echo Success
:
fi
or you can use the no-op to comment out the lines:
if [ "$foo" != "1" ]
then
: e...
How to send and retrieve parameters using $state.go toParams and $stateParams?
...
This didn't work for me in the latest v0.2.13. Perhaps, it was undocumented for a reason.
– demisx
Mar 23 '15 at 16:14
1
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INSERT IF NOT EXISTS ELSE UPDATE?
... your select needs at least WHERE true to solve parser ambiguity about the token ON with the join syntax.
Be warned that INSERT OR REPLACE... will delete the record before inserting a new one if it has to replace, which could be bad if you have foreign key cascades or other delete triggers.
...
Sql Server string to date conversion
...ptional argument - it is based on .Net's format, so most if not all of the token formats you'd expect to see will be there.
DECLARE @d DATETIME = '2008-10-13 18:45:19';
-- returns Oct-13/2008 18:45:19:
SELECT FORMAT(@d, N'MMM-dd/yyyy HH:mm:ss');
-- returns NULL if the conversion fails:
SELECT TRY...
Why are all fields in an interface implicitly static and final?
...constants, or even immutable. You can define e.g.
interface I {
String TOKEN = SomeOtherClass.heavyComputation();
JButton BAD_IDEA = new JButton("hello");
}
(Beware that doing this inside an annotation definition can confuse javac, relating to the fact that the above actually compiles to a ...
Can I call a constructor from another constructor (do constructor chaining) in C++?
... very clean. Overloading is more code, correct, but the implementation encapsulates the defaults.
– Eugene Ryabtsev
Apr 8 '14 at 10:31
3
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How to loop through files matching wildcard in batch file
... good way to pass commands into f.in and f.out would be to...
for /F %%D "tokens=*" in (dont_pass_through_these.txt) do (
for /F %%E in (%%D) do (
start /wait %%E
)
)
A link to all the Windows XP commands:link
I apologize if I did not answer this correctly. The question was very hard for me to r...
How do you echo a 4-digit Unicode character in Bash?
...
PS: I just noticed that the above hexdump/awk example is swithching the sequence of bytes in a byte-pair. This does not apply to a UTF-8 dump. It would be relavent if it were a dump of UTF-16LE and wanted to output Unicode C...
How to use the IEqualityComparer
...etHashCode if using this in a dictionary or with something like Distinct.
PS. I don't think any custom Equals methods work with entity framework directly on the database side (I think you know this because you do AsEnumerable) but this is a much simpler method to do a simple Equals for the general ...