cdisc adam

Objective:This article is translated from a blog post that was involved in ZFS file system development, now Delphix company CTO, Adam Levinso (Adam Leventhal): Apfs detailed (Apfs in Detail).The Apfs file system is the latest file system that Apple is preparing to launch in 2017, following hfs+, which, according to existing public information, has many of the advanced features of contemporary other file man

;>> classmates[-1]‘Tracy‘And so on, you can get the bottom 2nd, the bottom 3rd one:>>> classmates[-2]‘Bob‘>>> classmates[-3]‘Michael‘>>> classmates[-4]Traceback (most recent call last): File "Of course, the 4th to the bottom of the border.The list is a mutable, ordered table, so you can append an element to the end of the list:>>> classmates.append(‘Adam‘)>>> classmates[‘Michael‘, ‘Bob‘, ‘Tracy‘, ‘Adam‘]Tr

# exercise 1: Use the map function, the user entered the non-standard English name, the first letter capitalized, the other lowercase canonical name.def nomalize (name):Return Name.capitalize ()L1 = ["Adam", "LISA", "BarT"]L2 = List (map (NOMALIZE,L1))Print (L2) #[' Adam ', ' Lisa ', ' Bart '#练习2: the sum () function provided by Python can receive a list and sum. Write a prod () function that receives a lis

use reduce() it to write a function that converts the string to number.Practice :Do not use the JavaScript built-in parseint () function to implement a string2int () function with the map and reduce operations:‘use strict‘;function string2int(s) { // 利用js变量弱类型转换 var s_length = s.length; if (s_length == 1) { return s * 1; } else { var arr = s.split(""); var result = arr.reduce(function (x, y) { return x * 10 + y * 1; }); return result;

# This is a learning note for the Liaoche teacher Python tutorial1 , overviewThe python built-in sorted () function can sort the list.The sorted () function is also a high-order function that can receive a key function to implement a custom sort, and the function specified by key will be applied to each element of the list and sorted according to the result returned by the key function.# Direct Sort>>> Sorted ([36, 5,-12, 9,-21])[-21,-12, 5, 9, 36]# Accept the key function sort>>> sorted ([5, -1

Pop () methodPHP (N)Delete an element from listPaul's classmates had to turn away a few days ago, so how do we remove Paul from the existing list?If Paul's classmates were in the last one, we could use the pop () method of list to delete:>>> L = [' Adam ', ' Lisa ', ' Bart ', ' Paul ']>>> L.pop ()' Paul '>>> Print L[' Adam ', ' Lisa ', ' Bart ']The Pop () method always deletes the last element of the list ,

Sliceuse only one: to indicate from beginning to end:>>> L[:][‘Adam‘, ‘Lisa‘, ‘Bart‘, ‘Paul‘]The slice operation can also specify a third parameter: The third parameter indicates that each n takes one, and the top L[::2] takes one out of every two elements, that is, one by one.Change the list to a tuple, the slice operation is exactly the same, but the result of the slice becomes a tuple.IterationThe iterative operation is for a collection, regardless

want to achieve a sort that ignores case, we just need to change the key function:>>> sorted ([' ABC ', ' abc ', ' CBA ', ' BAC '],key=str.lower) [' abc ', ' abc ', ' BAC ', ' CBA ']Further, to reverse order, you can pass in the third parameter reverse=true:>>> sorted ([' ABC ', ' abc ', ' CBA ', ' BAC '],key=str.lower,reverse=true) [' CBA ', ' BAC ', ' abc ', ' ABC ']Sorted () The key to sorting is to implement a mapping function!Practice:Use a group of tuples to represent student names and gr

Python's update setBecause set stores a set of unordered elements that are not duplicated, the update set mainly does two things:One is to add the new element to the set, and the other is to remove the existing element from the set.when adding an element, use the Add () method of Set :>>> s = Set ([1, 2, 3]) >>> S.add (4) >>> print Sset ([1, 2, 3, 4])If the added element already exists in set, add () will not error, but will not be added:>>> s = Set ([1, 2, 3]) >>> S.add (3) >>> print sset ([1,

;> classmates[-1] ' Tracy 'And so on, you can get the bottom 2nd, the bottom 3rd one:>>> classmates[-2] ' Bob ' >>> classmates[-3] ' Michael ' >>> classmates[-4]traceback (most Recent call last): File ' Of course, the 4th to the bottom of the border.The list is a mutable, ordered table, so you can append an element to the end of the list:>>> classmates.append (' Adam ') >>> classmates[' Michael ', ' Bob ', ' Tracy ', '

This article is mainly about the use of the Load method in jquery and notes on the detailed introduction, the need for friends can come to the reference, I hope to help you. The full format of the call load method is: Load (URL, [data], [callback]), where nbsp; URL: refers to the address of the file to be imported. nbsp; Data: Optional parameters; Because load can not only import static HTML files, but also import dynamic scripts, such as PHP files, so to import a dynamic file, we can put the

Under Linux, there is a command called which, which finds the directory in the path where a command resides and displays it. Linux under: [adam@i ase adam]$ which LS /bin/ls [Adam@i ASE adam]$ which RM /BIN/RM has a where.exe in the NT Resource Kit, which has the same effect, but resource kit is charged, where we c

: jquery's Ajax load () application ExampleThere are get,post,ajax in jquery Ajax and what we are going to talk about in this article load,load can directly load the page and other differences, let me introduce the AJAX load usage example.The full format of the call load method is: Load (URL, [data], [callback]), whereURL: Refers to the address of the file to be imported.Data: Optional parameters, because load can not only import static HTML files, but also import dynamic scripts, such as

Caffe's Solver file configuration Explain the meaning of a parameter in the Solver.prototxt file. In the task of DL, the analytic solution can hardly be found, so it is transformed into the optimization problem in mathematics. The main function of Sovler is to alternately call forward conduction and reverse conduction (forward backward) to update the connection weights of the neural network so as to minimize loss, which is actually the parameter of the iterative optimization algorithm. The Caf

Use options (option) type　'T　option　= 　　　　 |　None 　　　　 |　Some　of　'T Let's look at an example: >　let　people　=　[　("Adam",　None); 　　　　　　　　　　　　　　　　　 ("Eve"　,　None); 　　　　　　　　　　　　　　　　　 ("Cain",　Some("Adam","Eve")); 　　　　　　　　　　　　　　　　　 ("Abel",　Some("Adam","Eve"))　];; val　people　:　(string　*　(string　*string)　option)　list Use pattern matching (patterns matching) to gene

Perhaps there is a situation where a record is associated with another record in a table, for example, every employee in the company has superiors and subordinates, and they are employees, and you can use the employee class in rails: Class Employee Let's use some data, where employees Clem and Dawn both have superiors and subordinates: Employee.delete_all adam = employee.create (: ID => 1,: Name => "Adam