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Why does flowing off the end of a non-void function without returning a value not produce a compiler
...nostic are not quite the same as "allowed". At the very least, your answer reads a bit like you're saying it's OK to do, which largely it is not.
– Lightness Races in Orbit
Jul 15 '11 at 14:26
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How to delete all records from table in sqlite with Android?
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String selectQuery = "DELETE FROM table_name ";
Cursor cursor = data1.getReadableDatabase().rawQuery(selectQuery, null);
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TypeScript static classes
...ted. Also tslint won't let you do that anymore for modules and namespaces. Read here: palantir.github.io/tslint/rules/no-namespace
– Florian Leitgeb
Nov 14 '17 at 13:24
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Differences between distribute, distutils, setuptools and distutils2?
...trust out-of-date information.
The Python Packaging User Guide is worth a read. Every page has a "last updated" date displayed, so you can check the recency of the manual, and it's quite comprehensive. The fact that it's hosted on a subdomain of python.org of the Python Software Foundation just add...
Android - print full exception backtrace to log
...nd of code caused this exception in the second parameter. The message is already included in the output anyway.
– EboMike
Mar 16 '14 at 0:40
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Loop code for each file in a directory [duplicate]
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@Zero3, the variable is used for readability only. PHP will always work with a copy of the array in any foreach loop, which means that scandir() will be called only once. (And since PHP uses copy-on-write you won't get any performance problems with this "cop...
What is the purpose of setting a key in data.table?
...ly use on= argument now to perform binary subsets rather than setting key. Read more from the new HTML vignettes. And keep an eye on that page for vignettes for joins.
– Arun
Dec 16 '15 at 11:11
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Change the name of a key in dictionary
...u can use dictionary comprehension:
This is an example I encountered while reading a CSV using a DictReader. The user had suffixed all the column names with ':'
ori_dict = {'key1:' : 1, 'key2:' : 2, 'key3:' : 3}
to get rid of the trailing ':' in the keys:
corrected_dict = { k.replace(':', ''): v ...
How to initialize a JavaScript Date to a particular time zone
...time zone, but not the other direction).
So although the browser can not read IANA timezones when creating a date, or has any methods to change the timezones on an existing Date object, there seems to be a hack around it:
function changeTimezone(date, ianatz) {
// suppose the date is 12:...
How to validate an email address using a regular expression?
...y from which I quote:
There is some danger that common usage and widespread sloppy coding will establish a de facto standard for e-mail addresses that is more restrictive than the recorded formal standard.
That is no better than all the other non-RFC patterns. It isn’t even smart enough to h...