You can use any structure you like. JSON is not schema based in the way XML is often used and Javascript is not statically typed. you can convert your JSON to a JS object using JSON.parse and then just test the existence of the property var obj = JSON.parse(jsonString); if(typeof obj.example[0].firstName != “undefined”) { //do … Read more
In Scala you can use scala.util.Random: util.Random.shuffle((1 to 10).toSeq) //Vector(9, 6, 8, 7, 10, 1, 2, 5, 3, 4) util.Random.shuffle(List(‘A’, ‘B’, ‘C’, ‘D’, ‘E’, ‘F’)) //List(B, D, A, E, C, F) Your results may vary…
Sign extension. Your compiler is implementing char as a signed char. When you pass the chars to printf they are all being sign extended during their promotion to ints. When the first bit is a 0 this doesn’t matter, because it gets extended with 0s. 0xAF in binary is 10101111 Since the first bit is … Read more
From top left to bottom right var theArray = [“ABCD”,”EFGH”,”IJKL”]; var length = { “x” : theArray[0].length, “y” : theArray.length }; length.max = Math.max(length.x, length.y); var temp, k, x, y; for (k = 0; k <= 2 * (length.max – 1); ++k) { for (temp = [], y = length.y – 1; (x = k … Read more
No, you can’t. Bit field can only be used with integral type variables. C11-ยง6.7.2.1/5 A bit-field shall have a type that is a qualified or unqualified version of _Bool, signed int, unsigned int, or some other implementation-defined type. Alternatively you can do this struct st { unsigned int i: 4; } arr_st[5]; but its size … Read more
There’s a swap method on slices: data.swap(i, j). The original code doesn’t work because the language requires that &muts do not alias, that is, if a piece of data is accessible via an &mut, then there must be no other way to use that data. In general, for successive indexes data[i], data[j], the compiler cannot … Read more
readdir is asynchronous. It won’t get the results right away. You should use the filePaths inside the callback. The only reason why the console shows the value is because the console evaluates the array when you unfold it. When you press the little arrow on the left, put the mouse on the i box on … Read more
All keys are strings in JavaScript – just use map: const sizes: number[] = Object.keys(foo).map(Number); This’ll only work for numeric strings – if it’s a European string involving decimals, for instance, it’ll be NaN, and that never ends well. console.log(Number(“10,7”)); Or change either of your types: const sizes: string[] = Object.keys(foo); Or: type Foo = … Read more
NumPy supports boolean indexing a[f] This assumes that a and f are NumPy arrays rather than Python lists (as in the question). You can convert with f = np.array(f).