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Restricting input to textbox: allowing only numbers and decimal point
.../Check if the text already contains the . character
if (txt.value.indexOf('.') === -1) {
return true;
} else {
return false;
}
} else {
if (charCode > 31 &&
(charCode < 48 || charCode > 57))
retur...
How to write LaTeX in IPython Notebook?
... LaTeX inside html/markdown. Just put your LaTeX math inside $$.
$$c = \sqrt{a^2 + b^2}$$
Or you can display LaTeX / Math output from Python, as seen towards the end of the notebook tour:
from IPython.display import display, Math, Latex
display(Math(r'F(k) = \int_{-\infty}^{\infty} f(x) e^{2\...
What's the fastest way to do a bulk insert into Postgres?
...ide has some other good tips on how to speed up the process, like removing indexes and foreign keys before loading the data (and adding them back afterwards).
share
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improve this answer
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Is there a simple way to convert C++ enum to string?
...
QT is able to pull that of (thanks to the meta object compiler):
QNetworkReply::NetworkError error;
error = fetchStuff();
if (error != QNetworkReply::NoError) {
QString errorValue;
QMetaObject meta = QNetworkReply...
Nullable type as a generic parameter possible?
...
public static T GetValueOrDefault<T>(this IDataRecord rdr, int index)
{
object val = rdr[index];
if (!(val is DBNull))
return (T)val;
return default(T);
}
Just use it like this:
decimal? Quantity = rdr.GetValueOrDefault<decimal?>(1);
string Unit = rdr.GetVa...
Staging Deleted files
... name (e.g. dir to add dir/file1 and dir/file2) can be given to update the index to match the current state of the directory as a whole (e.g. specifying dir will record not just a file dir/file1 modified in the working tree, a file dir/file2 added to the working tree, but also a file dir/file3 remov...
Check if application is on its first run [duplicate]
... answered Aug 27 '11 at 22:38
SquonkSquonk
47k1818 gold badges9696 silver badges134134 bronze badges
...
Cross-browser testing: All major browsers on ONE machine
...of IE/Safari on a single Windows machine.
Download: http://sandboxie.com/index.php?DownloadSandboxie
Patch: The extended version is required to enable multiple sandboxes at a time. Pay them or visit YouTube.
Running multiple IE/Safari versions simultaneously requires the extended version. If you d...
Unix command-line JSON parser? [closed]
...answered Jul 31 '12 at 12:11
muhqumuhqu
10.4k55 gold badges2525 silver badges2727 bronze badges
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Can I add a UNIQUE constraint to a PostgreSQL table, after it's already created?
...
If you want to let PostgreSQL generate the index name, use ALTER TABLE tablename ADD UNIQUE (columns);. (Note that the CONSTRAINT keyword must be omitted.)
– jpmc26
Nov 26 '14 at 1:41
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