slice

介绍 Slice IP用来在总线上进行截位操作， 可配置输入总线位宽，配置输出所需要的位宽，进行截位操作。 如上图，Din Width为输入总线位宽。Din From为需要截取的最高bit位，Din Down to为需要截取的最低bit位，例如，如果需要从32bits中截取低12bits，则Din Width设置为32，Din from设置为11，Din Down To设置为0；如果只截取1bit，则将Din from与Din Down To设置为同样的数，如果截取bit位为5，则Din from与Din Down To同时设置为5. 文章来源: https://blog.csdn.net/shiyangcool/article/details/90753805

Array数组：slice() 　　slice() : 截取 Array 的部分元素，然后返回一个新的Array. 　　var arr = ['a', ' b', 'c', 'd', 'e', 'f', 'g']; 　　arr.slice(0, 3); //从索引0开始，到索引3结束，但不包含索引3： ['a', 'b', 'c'] 　　arr.slice(3); //从索引3开始到结束 ： ['d', 'e', 'f', 'g'] 　　注意： slice() 的起止参数包括开始索引，不包括结束索引。 String字符串：substring() 　　substring() 返回指定索引区间的字串。 　　var str = 'Hello, world'; 　　str.substring(0, 5); //从索引0开始到5 ，不包括5 ，返回‘Hello’ 　　str.substring(7); //从索引7到结束，返回‘world’； 　　 　　 转载请标明出处: slice 与 substring 文章来源: slice 与 substring

[].slice === Array.prototype.slice true []为创建数组,当[].slice的时候,自然会去找原型链 [].__proto__.slice === Array.prototype.slice true Array.prototype.slice是定义的方法,可以被重写 [].silce是使用定义的方法 自身的属性不同(因为原型与[]的区别) Object.getOwnPropertyNames(Array.prototype) (37) ["length", "constructor", "concat", "pop", "push", "shift", "unshift", "slice", "splice", "includes", "indexOf", "keys", "entries", "forEach", "filter", "map", "every", "some", "reduce", "reduceRight", "toString", "toLocaleString", "join", "reverse", "sort", "lastIndexOf", "copyWithin", "find", "findIndex", "fill", "remove", "removeFirstIf", "removeIf",

Situation: I've a slice of values and need to pick up a randomly chosen value from it. Then I want to concatenate it with a fixed string. This is my code so far: func main() { //create the reasons slice and append reasons to it reasons := make([]string, 0) reasons = append(reasons, "Locked out", "Pipes broke", "Food poisoning", "Not feeling well") message := fmt.Sprint("Gonna work from home...", pick a random reason ) } Question: Is there a built-in function, which can help me by doing the " pick a random reason " part? Grzegorz Żur Use function Intn from rand package to select a random index.

This question already has answers here : Understanding slice notation (32 answers) The extended slice syntax in python has been explained to me as " a[n:m:k] returns every kth element from n to m ". This gives me a good idea what to expect when k is positive. But I'm lost on how to interpret a[n:m:k] for negative k. I know that a[::-1] reverses a, and that a[::-k] takes ever kth element of the reversed a. But how is this a generalization of the definition for k positive? I'd like to know how a[n:m:k] is actually defined, so that (for example) I can understand why: "abcd"[-1:0:-1] = "dcb" Is a

I would appreciate any help, to understand following behavior when slicing a lil_matrix (A) from the scipy.sparse package. Actually, I would like to extract a submatrix based on an arbitrary index list for both rows and columns. When I used this two lines of code: x1 = A[list 1,:] x2 = x1[:,list 2] Everything was fine and I could extract the right submatrix. When I tried to do this in one line, it failed (The returning matrix was empty) x=A[list 1,list 2] Why is this so? Overall, I have used a similar command in matlab and there it works. So, why not use the first, since it works? It seems to

p = [1,2,3] print(p) # [1, 2, 3] q=p[:] # supposed to do a shallow copy q[0]=11 print(q) #[11, 2, 3] print(p) #[1, 2, 3] # above confirms that q is not p, and is a distinct copy del p[:] # why is this not creating a copy and deleting that copy ? print(p) # [] Above confirms p[:] doesnt work the same way in these 2 situations. Isn't it ? Considering that in the following code, I expect to be working directly with p and not a copy of p , p[0] = 111 p[1:3] = [222, 333] print(p) # [111, 222, 333] I feel del p[:] is consistent with p[:] , all of them referencing the original list but q=p[:] is

I'm looking for a way to easily determine if all not None items in a list occur in a single continuous slice. I'll use integers as examples of not None items. For example, the list [None, None, 1, 2, 3, None, None] meets my requirements for continuous integer entries. By contrast, [1, 2, None, None, 3, None] is not continuous, because there are None entries between integers. Some more examples to make this a clear as possible. Continuous : [1, 2, 3, None, None] [None, None, 1, 2, 3] [None, 1, 2, 3, None] Not Continuous : [None, 1, None, 2, None, 3] [None, None, 1, None, 2, 3] [1, 2, None, 3,