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Creating dataframe from a dictionary where entries have different lengths
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You can also use pd.concat along axis=1 with a list of pd.Series objects:
import pandas as pd, numpy as np
d = {'A': np.array([1,2]), 'B': np.array([1,2,3,4])}
res = pd.concat([pd.Series(v, name=k) for k, v in d.items()], axis=1)
print(res)
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Most efficient way to prepend a value to an array
...g an array to the front of another array, it is more efficient to just use concat. So:
var newArray = values.concat(oldArray);
But this will still be O(N) in the size of oldArray. Still, it is more efficient than manually iterating over oldArray. Also, depending on the details, it may help you, b...
How to remove element from array in forEach loop?
...se a string contains 'f', a result is different.
var review = ["of", "concat", "copyWithin", "entries", "every", "fill", "filter", "find", "findIndex", "flatMap", "flatten", "forEach", "includes", "indexOf", "join", "keys", "lastIndexOf", "map", "pop", "push", "reduce", "reduceRight", "reverse"...
How to get the difference between two arrays of objects in JavaScript
...er(comparer(b));
var onlyInB = b.filter(comparer(a));
result = onlyInA.concat(onlyInB);
console.log(result);
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Finding duplicate values in MySQL
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@NobleUplift You can do a GROUP_CONCAT(id) and it will list the IDs. See my answer for an example.
– Matt Rardon
Feb 19 '15 at 0:53
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How to strip all non-alphabetic characters from string in SQL Server?
...acters, you'll have to add more if you have longer strings to filter.
SET CONCAT_NULL_YIELDS_NULL OFF;
with
ToBeScrubbed
as (
select 1 as id, '*SOME 222@ !@* #* BOGUS !@*&! DATA' as ColumnToScrub
),
Scrubbed as (
select
P.Number as ValueOrder,
isnull ( substring ...
“The given path's format is not supported.”
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Or even shorter return string.Concat(s.Split(Path.GetInvalidFileNameChars()));
– Yousha Aleayoub
Nov 22 '19 at 15:39
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How to add hyperlink in JLabel?
...rther escaping
private static String linkIfy(String s) {
return A_HREF.concat(s).concat(HREF_CLOSED).concat(s).concat(HREF_END);
}
//WARNING
//This method requires that s is a plain string that requires
//no further escaping
private static String htmlIfy(String s) {
return HTML.concat(s).co...
How to flatten tree via LINQ?
...rable<MyNode> e) =>
e.SelectMany(c => Flatten(c.Elements)).Concat(new[] { e });
You can then filter by group using Where(...).
To earn some "points for style", convert Flatten to an extension function in a static class.
public static IEnumerable<MyNode> Flatten(this IEnumer...
Shortcuts in Objective-C to concatenate NSStrings
Are there any shortcuts to ( stringByAppendingString: ) string concatenation in Objective-C, or shortcuts for working with NSString in general?
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