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How to prevent Node.js from exiting while waiting for a callback?
...timeouts and making async calls from the core library can do this. You can test this easily by writing a one line program that expects an event that will never fire. From this answer, you'd expect it to never terminate, but it does terminate instantly. See this answer for more info.
...
Difference between map, applymap and apply methods in Pandas
...d applymap slightly faster than apply in
some cases. My suggestion is to test them both and use whatever works
better.
map is optimised for elementwise mappings and transformation. Operations that involve dictionaries or Series will enable pandas to
use faster code paths for better performan...
Unable to verify leaf signature
...et it up the right way with certificates. I merely wanted to setup a quick test for a demo so the code I posted is a quick fix. I should have prefaced with that in my comment.
– LukeP
Jun 3 '15 at 21:48
...
In a Django form, how do I make a field readonly (or disabled) so that it cannot be edited?
...
The key to Daniel's example is testing the .id field. Newly created objects will have id==None. By the way, one of the oldest open Django tickets is about this issue. See code.djangoproject.com/ticket/342 .
– Peter Rowell
...
Using an HTML button to call a JavaScript function
...entById support:
if (document.getElementById) { // NB: no brackets; we're testing for existence of the method, not executing it
// do stuff...
}
You probably want to validate your input as well; something like
var vesdiameter = parseFloat(document.getElementById("VesDiameter").value);
if (is...
Read/Write String from/to a File in Android
...aries, but benchmarks 50% - 400% slower than the other options (in various tests on my Nexus 5).
Notes
For each of these strategies, you'll be asked to catch an IOException.
The default character encoding on Android is UTF-8.
If you are using external storage, you'll need to add to your mani...
How does this print “hello world”?
... {
public static void main(String... args) {
String v = "hello test";
int len = Math.min(12, v.length());
long res = 0L;
for (int i = 0; i < len; i++) {
long c = (long) v.charAt(i) & 31;
res |= ((((31 - c) / 31) * 31) | c) << 5...
Best way to read a large file into a byte array in C#?
... File.ReadAllBytes throws OutOfMemoryException with big files (tested with 630 MB file and it failed)
– sakito
Mar 13 '13 at 1:31
6
...
How do I tar a directory of files and folders without including the directory itself?
... following symlinks etc), the find command is pretty powerful, and you can test it by just removing the tar part of the above command:
$ find /my/dir/ -printf "%P\n" -type f -o -type l -o -type d
> textfile.txt
> documentation.pdf
> subfolder2
> subfolder
> subfolder/.gitignore
For...
How do I scroll to an element within an overflowed Div?
...ywhere inside #overflow_div. It doesn't really have to be a direct child.
Tested in Firefox (23) and Chrome (28).
If you want to scroll the whole page, check this question.
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