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Pandas read_csv low_memory and dtype options
...h column is very memory demanding. Pandas tries to determine what dtype to set by analyzing the data in each column.
Dtype Guessing (very bad)
Pandas can only determine what dtype a column should have once the whole file is read. This means nothing can really be parsed before the whole file is read ...
How to write a:hover in inline CSS?
...="text/javascript">
var link = document.createElement("link");
link.setAttribute("rel","stylesheet");
link.setAttribute("href","http://wherever.com/yourstylesheet.css");
var head = document.getElementsByTagName("head")[0];
head.appendChild(link);
</script>
Caution: the above ass...
JavaScript “new Array(n)” and “Array.prototype.map” weirdness
... array which have assigned value; [...]
[undefined] actually applies the setter on the index(es) so that map will iterate, whereas new Array(1) just initializes the index(es) with a default value of undefined so map skips it.
I believe this is the same for all iteration methods.
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Swift: #warning equivalent
...Sambells:
Add a new Run Script to your target's build phases tab (project settings > build phases > '+' > new run script phase), and paste the following code in the empty box:
TAGS="TODO:|FIXME:"
echo "searching ${SRCROOT} for ${TAGS}"
find "${SRCROOT}" \( -name "*.swift" \) -print0 | xa...
Calling remove in foreach loop in Java [duplicate]
...nes of code) way to remove duplicates is to dump the list into a LinkedHashSet (and then back into a List if you need). This preserves insertion order while removing duplicates.
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What's best SQL datatype for storing JSON string?
...baseGenerated(DatabaseGeneratedOption.Identity)]
public Guid Id { get; set; }
public string FieldJson { get; set; } //save json in this field and
[NotMapped]
public List<FieldList> FieldList // get return list from this properity
{
get => !string....
How to round up to the nearest 10 (or 100 or X)?
... round number for the y-axis max that is greater than the max of the dataset.
11 Answers
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Attempt to set a non-property-list object as an NSUserDefaults
...rDefaults *userData = [NSUserDefaults standardUserDefaults];
[userData setObject:archiveArray forKey:@"personDataArray"];
}
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The “backspace” escape character '\b': unexpected behavior?
... editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
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How to efficiently concatenate strings in go
In Go, a string is a primitive type, which means it is read-only, and every manipulation of it will create a new string.
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