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How to check if function exists in JavaScript?
...
If you're using eval to convert a string to function, and you want to check if this eval'd method exists, you'll want to use typeof and your function string inside an eval:
var functionString = "nonexsitantFunction"
eval("typeof " + functionString)...
How can I sort arrays and data in PHP?
... $array[$j] = $tem;
}
}
}
return $array;
}
Selection sort
From the Wikipedia article on Selection sort:
In computer science, selection sort is a sorting algorithm, specifically an in-place comparison sort. It has O(n2) time complexity, making it inefficient on la...
CS0120: An object reference is required for the nonstatic field, method, or property 'foo'
... return in a ToString() as it is a static method. You can replace it with Convert.ToString() that can enable null value.
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Get String in YYYYMMDD format from JS date object?
...thod will return the string '2015-08-31T23:00:00.000Z' because the date is converted to UTC/0-offset before being stringified.
– Luke Baulch
Sep 13 '15 at 2:44
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Java Array Sort descending?
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Convert your primitives to their respective objects. Integer for int, Double for double, Boolean for boolean, etc.
– Ishmael
Aug 21 '13 at 15:32
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How add “or” in switch statements?
...sizes: 1=Small 2=Medium 3=Large");
Console.Write("Please enter your selection: ");
string s = Console.ReadLine();
int n = int.Parse(s);
int cost = 0;
switch(n)
{
case 1:
cost += 25;
break;
...
get UTC time in PHP
...ary 1 1970 00:00:00 GMT)". Note GMT. The fact that by default your system converts this to your timezone for display, is a user convenience. Internally, its always GMT.
– ToolmakerSteve
Apr 17 '19 at 12:09
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Reading JSON from a file?
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In python 3, we can use below method.
Read from file and convert to JSON
import json
from pprint import pprint
# Considering "json_list.json" is a json file
with open('json_list.json') as fd:
json_data = json.load(fd)
pprint(json_data)
with statement automatically cl...
Pretty printing XML with javascript
...tch="node()|@*">
<xsl:copy>
<xsl:apply-templates select="node()|@*"/>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>
When applying this transformation on the provided XML document:
<root><node/></root>
most XSLT processo...
How to split/partition a dataset into training and test datasets for, e.g., cross validation?
...escribes, you can just use the following instructions:
from sklearn.model_selection import train_test_split
data, labels = np.arange(10).reshape((5, 2)), range(5)
data_train, data_test, labels_train, labels_test = train_test_split(data, labels, test_size=0.20, random_state=42)
This way you can ...