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I have a string that is "M456456" for example, and i need to keep only the numbers. So the ouput has to be "456456"
How can i achieve this in Kotlin?
"M456456".filter(Char::isDigit)
"M456456".filter {it in '0'..'9'}
Use a regex replacement and remove all non digit characters:
val regex = """[^0-9]""".toRegex()
val input = "M456456"
val output = regex.replace(input, "")
println(output) // 456456
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I have one String variable like this:
var data = "FFFTTFFFT"
I want to get random position of 'T' present inside above String for which I am doing like this.
for (i in data.indices) {
if (data [i] == 'T') someList.add(i)
}
then
var randPos = someList.random()
I am able to do it using loop but I want to do it in idiomatic way in
Kotlin.
Shortest solution IMO:
val tIndices = data.mapIndexedNotNull { i, c -> i.takeIf { c == 'T' } }
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I need to make a shorter version of the code below:
val y = 42
val x = "Score" + (y + 4).toString ()
Thank you in advance
You may use string interpolation:
val x = "Score${y + 4}"
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This might seem a little trivial, but since we read more code than we write, I want to know which of these versions looks nicer and more readable for you
private val VALUES by lazy {
mutableListOf<Value>().apply {
add(VALUE_1)
add(VALUE_2)
add(VALUE_3)
}
}
OR
private val VALUES by lazy {
mutableListOf<Value>()
.apply {
add(VALUE_1)
add(VALUE_2)
add(VALUE_3)
}
}
In other words, should we care that the method (.apply) be on the same line as the caller, or the ending curly bracket to be aligned with the (.apply) method?
As per https://kotlinlang.org/docs/reference/coding-conventions.html
Chained call wrapping
When wrapping chained calls, put the . character or the ?. operator on the next line, with a single indent:
val anchor = owner
?.firstChild!!
.siblings(forward = true)
.dropWhile { it is PsiComment || it is PsiWhiteSpace }
The first call in the chain usually should have a line break before it, but it's OK to omit it if the code makes more sense that way.
So it's up to you :)
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Here is the question which is Re Phrased.
Here is the raw binary data, hex encoded, which i need as a output:
040000008200E00074C5B7101A82E0080000000000000000000000000000000000000000310000007643616C2D5569640100000033353335324538372D343338462D343444362D413432462D37393942423334313033333800
I can extract some part of the raw data i.e.(040000008200E00074C5B7101A82E0080000000000000000000000000000000000000000310000007643616C2D55696401000000) from the object which i am getting from the micro soft outlook.
The Rest of the part that is
33353335324538372D343338462D343444362D413432462D373939424233343130333338 is the conversion of the UID : 373D06E9-587E-4930-B846-12500FF1AC2F.
So My question here is how to convert the above UID i.e 373D06E9-587E-4930-B846-12500FF1AC2F to this format 33353335324538372D343338462D343444362D413432462D373939424233343130333338 using objective C or cocoa.
Thanks in Advance.
You should look here:
https://developer.apple.com/library/mac/documentation/corefoundation/Reference/CFUUIDRef/Reference/reference.html#//apple_ref/c/func/CFUUIDCreateFromString
CFUUIDCreateFromString() appears to be the API you are looking for. Assuming that CFUUID is the "binary format" you are searching for.
If you then want "raw bytes", look at CFUUIDGetUUIDBytes()
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Assuming sngX = 67521.345, What will be displayed when the line of code:
Label1.Text = FormatCurrency(sngX)
is executed.
Assuming that your system regional settings currency sign is $, leading digits is false, and digit grouping is false, then FormatCurrency(67521.345) = $67,521.35
Since you haven't specified your regional settings, and haven't said that you want to use specific values for the other FormatCurrency parameters, your results may vary.