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Format bytes to kilobytes, megabytes, gigabytes
...] Number of digits after the decimal point (eg. 1)
* @return string Value converted with unit (eg. 25.3KB)
*/
function formatBytes($bytes, $precision = 2) {
$unit = ["B", "KB", "MB", "GB"];
$exp = floor(log($bytes, 1024)) | 0;
return round($bytes / (pow(1024, $exp)), $precision).$unit[...
Repeat each row of data.frame the number of times specified in a column
...q(nrow(df)), df$freq), 1:2]
The code for data.table is a tad cleaner:
# convert to data.table by reference
setDT(df)
df.expanded <- df[rep(seq(.N), freq), !"freq"]
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Decompressing GZip Stream from HTTPClient Response
...d JSON
response = client.GetAsync(url).Result;
//converts JSON to string
string responseJSONContent = response.Content.ReadAsStringAsync().Result;
//deserializes string to list
var jsonList = DeSerializeJsonString(responseJSONContent);
...
How to subtract X days from a date using Java calendar?
... @ShahzadImam, check out DateTimeFormat. It will allow you to convert DateTime instances to strings using arbitrary formats. It's very similar to the java.text.DateFormat class.
– Mike Deck
Feb 28 '12 at 15:40
...
When to use DataContract and DataMember attributes?
...the Data Contract Serializer by default to serialize and deserialize data (convert it to and from XML). All .NET Framework primitive types, such as integers and strings, as well as certain types treated as primitives, such as DateTime and XmlElement, can be serialized with no other preparation and a...
How do you get a string from a MemoryStream?
...
Using a StreamReader to convert the MemoryStream to a String.
<Extension()> _
Public Function ReadAll(ByVal memStream As MemoryStream) As String
' Reset the stream otherwise you will just get an empty string.
' Remember the position s...
Getting a File's MD5 Checksum in Java
... return complete.digest();
}
// see this How-to for a faster way to convert
// a byte array to a HEX string
public static String getMD5Checksum(String filename) throws Exception {
byte[] b = createChecksum(filename);
String result = "";
for (int i=0; i < b.lengt...
ArithmeticException: “Non-terminating decimal expansion; no exact representable decimal result”
...ver, if you supply a RoundingMode and a precision, then it will be able to convert (eg. 1.333333333-to-infinity to something like 1.3333 ... but you as the programmer need to tell it what precision you're 'happy with'.
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What is std::move(), and when should it be used?
...ically a function - I would say it isn't really a function. It's sort of a converter between ways the compiler considers an expression's value.
2. "What does it do?"
The first thing to note is that std::move() doesn't actually move anything. It changes an expression from being an lvalue (such as a n...
Given a number, find the next higher number which has the exact same set of digits as the original n
...orce increment, sort and compare
Along the brute force solutions would be convert to a String
and brute force all the possible numbers using those digits.
Create ints out of them all, put them in a list and sort it,
get the next entry after the target entry.
If you spent 30 minutes on this and di...