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difference between foldLeft and reduceLeft in Scala
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For reference, reduceLeft will error if applied to an empty container with the following error.
java.lang.UnsupportedOperationException: empty.reduceLeft
Reworking the code to use
myList foldLeft(List[String]()) {(a,b) => a+b}
is one potential op...
Can pandas automatically recognize dates?
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Did not work for me, I got the following error: TypeError: strptime() argument 1 must be str, not float
– Jean Paul
May 4 '17 at 12:36
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How to concatenate strings of a string field in a PostgreSQL 'group by' query?
... ') AS semi_colon_separated_names FROM things;
But this will be a syntax error:
SELECT string_agg(name, '; ' ORDER BY name) AS semi_colon_separated_names FROM things;
--> ERROR: syntax error at or near "ORDER"
Tested on PostgreSQL 8.3.
CREATE FUNCTION string_agg_transfn(text, text, text)
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django admin - add custom form fields that are not part of the model
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@sthzg, Because it's not correct. It gives me the error: YourModelAdmin.list_display[0], 'extra_field' is not a callable or an attribute of 'YourModelAdmin' or found in the model 'YourModel'.
– Cerin
Jun 13 '16 at 15:39
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Using node.js as a simple web server
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Note that fs.exists() is also deprecated now. Catch the error on the fs.stat() rather than creating a race condition.
– Matt
Feb 1 '17 at 5:26
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TypeError: 'str' does not support the buffer interface
The above python code is giving me following error:
7 Answers
7
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How to detect when cancel is clicked on file input?
...meraDismiss() {
const REQUESTED_DELAY_MS = 25;
const ALLOWED_MARGIN_OF_ERROR_MS = 25;
const MAX_REASONABLE_DELAY_MS =
REQUESTED_DELAY_MS + ALLOWED_MARGIN_OF_ERROR_MS;
const MAX_TRIALS_TO_RECORD = 10;
const triggerDelays = [];
let lastTriggerTime = Date.now();
return new Promise...
Add a “hook” to all AJAX requests on a page
... // you can't tell what its destination is or call abort() without an error
// so only really good for logging that a request has happened
// I could be wrong, I hope so...
// EDIT: I suppose you could override the onreadystatechange handler though
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Writing a git post-receive hook to deal with a specific branch
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Sorry to bring up an old thread, but I'm getting an error at the if statement. fatal: the remote end hung up unexpectedly. error: error in the sideband demultiplexer. It will echo the $branch outside the if statement.
– gin93r
Apr 7 '14 a...
Garbage collector in Android
...gc().
I tried to create Bitmaps, but was always getting "VM out of memory error". But, when I called System.gc() first, it was OK.
When creating bitmaps, Android often fails with out of memory errors, and does not try to garbage collect first. Hence, call System.gc(), and you have enough memory to...