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How to get index in Handlebars each helper?
...ts/handlebars.js/issues/250#issuecomment-9514811
The index of the current array item has been available for some time now via @index:
{{#each array}}
{{@index}}: {{this}}
{{/each}}
For object iteration, use @key instead:
{{#each object}}
{{@key}}: {{this}}
{{/each}}
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Convert form data to JavaScript object with jQuery
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serializeArray already does exactly that. You just need to massage the data into your required format:
function objectifyForm(formArray) {
//serialize data function
var returnArray = {};
for (var i = 0; i < formArray.le...
JavaScript: empty array, [ ] evaluates to true in conditional structures. Why is this?
...ng "0" (zero in quotes), "false" (false in quotes), empty functions, empty arrays, and empty objects.
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How do you create a random string that's suitable for a session ID in PostgreSQL?
...nd if;
for i in 1..length loop
result := result || chars[1+random()*(array_length(chars, 1)-1)];
end loop;
return result;
end;
$$ language plpgsql;
And the usage:
select random_string(15);
Example output:
select random_string(15) from generate_series(1,15);
random_string
---------...
How to convert a NumPy array to PIL image applying matplotlib colormap
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Quite a busy one-liner, but here it is:
First ensure your NumPy array, myarray, is normalised with the max value at 1.0.
Apply the colormap directly to myarray.
Rescale to the 0-255 range.
Convert to integers, using np.uint8().
Use Image.fromarray().
And you're done:
from PIL import Im...
Unpacking array into separate variables in JavaScript
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You can use array's apply function if you want an array items to be passed as a function arguments.
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Ruby Array find_first object?
Am I missing something in the Array documentation? I have an array which contains up to one object satisfying a certain criterion. I'd like to efficiently find that object. The best idea I have from the docs is this:
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Using Java 8 to convert a list of objects into a string obtained from the toString() method
...end your list items in a StringBuilder
List<Integer> list = new ArrayList<>();
list.add(1);
list.add(2);
list.add(3);
StringBuilder b = new StringBuilder();
list.forEach(b::append);
System.out.println(b);
you can also try:
String s = list.stream().map(e -> ...
Checking if a key exists in a JavaScript object?
How do I check if a particular key exists in a JavaScript object or array?
22 Answers
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size_t vs. uintptr_t
The C standard guarantees that size_t is a type that can hold any array index. This means that, logically, size_t should be able to hold any pointer type. I've read on some sites that I found on the Googles that this is legal and/or should always work:
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