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What is the best (idiomatic) way to check the type of a Python variable? [duplicate]
...m Novice to Professional) is to try <value> + '' and check for a TypeError. If TypeError is not raised, then it is string-like. Only downside is that I don't know the performance cost if the string is large. Maybe the interpreter is smart enough that there is essentially zero cost? I don't kno...
Database development mistakes made by application developers [closed]
...e first statement.
Commit the Transaction after the last statement.
On any error, Rollback the Transaction. And very NB! Don't forget to skip/abort all statements that follow after the error.
Also recommended to pay careful attention to the subtelties of how your database connectivity layer, and d...
Android TextView Justify Text
...asses. one of them didnt have any packagename, the other gives some yellow error. Actually I can not trust.
– mehmet
Apr 22 '14 at 20:35
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MySQL - SELECT WHERE field IN (subquery) - Extremely slow why?
...ld must be in the select, because otherwise the having clause will give an error, but I'm not 100% sure
Never use IN with a subquery; this is notoriously slow.
Only ever use IN with a fixed list of values.
More tips
If you want to make queries faster,
don't do a SELECT * only select
the field...
Formatting a float to 2 decimal places
...rpolated strings. I'm actually posting this because I'm tired of trial and error and eventually scrolling through tons of docs every time I need to format some scalar.
$"{1234.5678:0.00}" "1234.57" 2 decimal places, notice that value is rounded
$"{1234.5678,10:0.00}" " 1234.57" ...
Triggering HTML5 Form Validation
...uite annoying, I assume you have a better solution for notifying about the errors. Here's a working example of my code above.
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How do you stop tracking a remote branch in Git?
...ill still try to push that branch (which could give you a non-fast-forward error as it did for ruffin). This is because the config push.default defaults to matching which means:
matching - push all matching branches. All branches having the same name in both ends are considered to be matching. T...
How to send email attachments?
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best answer for me but there is a small error: replace import pathlibwith from pathlib import Path
– AleAve81
Apr 29 at 20:38
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How do you clear Apache Maven's cache?
...t the network. Delete what you see locally.
And for good measure, ignore errors (--fail-at-end) till the very end. This is sometimes useful for projects that have a somewhat messed up set of dependencies or rely on a somewhat messed up internal repository (it happens.)
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Easiest way to pass an AngularJS scope variable from directive to controller?
...derstand.
– maxisam
Nov 9 '15 at 15:05
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