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How to delete a remote tag?
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You just need to push an 'empty' reference to the remote tag name:
git push origin :tagname
Or, more expressively, use the --delete option (or -d if your git version is older than 1.8.0):
git push --delete origin tagname
Note that git has tag namespace and branch namespace so you may u...
Wait for page load in Selenium
...ebDriver> wait = new OpenQA.Selenium.Support.UI.WebDriverWait(driver, TimeSpan.FromSeconds(30.00));
wait.Until(driver1 => ((IJavaScriptExecutor)driver).ExecuteScript("return document.readyState").Equals("complete"));
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Test for multiple cases in a switch, like an OR (||)
... you use a switch case when you need to test for a or b in the same case?
6 Answers
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How do you add CSS with Javascript?
...so do this using DOM Level 2 CSS interfaces (MDN):
var sheet = window.document.styleSheets[0];
sheet.insertRule('strong { color: red; }', sheet.cssRules.length);
...on all but (naturally) IE8 and prior, which uses its own marginally-different wording:
sheet.addRule('strong', 'color: red;', -1);
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find -exec a shell function in Linux?
... with export -f, otherwise the subshell won't inherit them:
export -f dosomething
find . -exec bash -c 'dosomething "$0"' {} \;
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SQL WHERE ID IN (id1, id2, …, idn)
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Option 1 is the only good solution.
Why?
Option 2 does the same but you repeat the column name lots of times; additionally the SQL engine doesn't immediately know that you want to check if the value is one of the values in a fixed list. However, a good SQL engine could optimize it to h...
How to convert Strings to and from UTF8 byte arrays in Java
...va, I have a String and I want to encode it as a byte array (in UTF8, or some other encoding). Alternately, I have a byte array (in some known encoding) and I want to convert it into a Java String. How do I do these conversions?
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Breaking out of nested loops [duplicate]
...nother way, short of repeating the test or re-organizing the code. It is sometimes a bit annoying.
In the rejection message, Mr van Rossum mentions using return, which is really sensible and something I need to remember personally. :)
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Python: most idiomatic way to convert None to empty string?
...to behave like the str() built-in, but return an empty string when the argument is None, do this:
def xstr(s):
if s is None:
return ''
return str(s)
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DatabaseError: current transaction is aborted, commands ignored until end of transaction block?
I got a lot of errors with the message :
19 Answers
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