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Best Practice: Access form elements by HTML id or name attribute?
...Form is the name of your validation function... but you can name it myFunc if you really, really want to). The important point is that validateForm() should return false whenever the form is not valid, as well as indicating the problem field(s) to the user. It should return true when the form data...
What are Aggregates and PODs and how/why are they special?
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How to read:
This article is rather long. If you want to know about both aggregates and PODs (Plain Old Data) take time and read it. If you are interested just in aggregates, read only the first part. If you are interested only in PODs then you must first read the definition, implic...
Strings in a DataFrame, but dtype is object
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can I get datatype returned as string, somehow. I know I can always use type(df["column"].iloc[0]), but it may so happen that it is nan
– user1953366
Apr 28 '19 at 8:12
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Error - trustAnchors parameter must be non-empty
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This bizarre message means that the truststore you specified was:
empty,
not found, or
couldn't be opened (due to access permissions for example).
See also @AdamPlumb's answer below.
To debug this issue (I wrote about it here) and understand what truststore is being used you...
Check time difference in Javascript
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I never know if dates in this format will be parsed as d/m/y or m/d/y. The official formats accepted are here (whatever Date.parse() accepts is valid), developer.mozilla.org/en/JavaScript/Reference/Global_Objects/…
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MongoDB - Update objects in a document's array (nested updating)
...at this will only increment the first matched subdocument in any array (so if you have another document in the array with "item_name" equal to "my_item_two", it won't get incremented). But this might be what you want.
The second part is trickier. We can push a new item to an array without a "my_...
How to unpack and pack pkg file?
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Packages are just .xar archives with a different extension and a specified file hierarchy. Unfortunately, part of that file hierarchy is a cpio.gz archive of the actual installables, and usually that's what you want to edit. And there's also a Bom file that include...
How to do exponentiation in clojure?
How can I do exponentiation in clojure?
For now I'm only needing integer exponentiation, but the question goes for fractions too.
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Replace duplicate spaces with a single space in T-SQL
...a moment to figure out you you used the '><','' No space replace but now that I get it... it is very brilliant. I did very much like @richardtallent suggestion of using the non-printable ASCII characters the added combination of which produces: REPLACE(REPLACE(REPLACE(LastName,' ','CHAR(17)CHA...
What is the purpose of a self executing function in javascript?
... in javascript is to wrap it in a function:
function main() {
// We are now in our own sound-proofed room and the
// character-converter libarary's name() function can exist at the
// same time as ours.
var userName = "Sean";
console.log(name());
function name() {
return userN...