array

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I've got an unsorted array of keys like this: keys = ["ccc", "ddd", "ggg", "aaa", "bbb"] and a hash hash = {"ddd" => 4, "aaa" => 1, "bbb" => 2, "eee" => 5, "fff" => 6} I'd like to join these two data structures to return a hash in the original order of keys to the first keys: {"ccc" => nil, "ddd" => 4, "ggg" => nil, "aaa" => 1, "bbb" => 2} Items NOT in the hash (like "ggg") should return nil. This is analogous to the "v-lookup" function in excel. this is in ruby. Thanks! 回答1: Cryptic: Hash[keys.zip(hash.values_at *keys)] Or a bit longer, a

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm writing a Bash script to simplify file copies from our main site to multiple agencies. In this script, I'm trying to use a variable as an associative array name but I optain an error, here is the code : #!/bin/bash declare -A GROUP1 declare -A GROUP2 declare -A GROUP3 declare -A ARRAY GROUP1["SITE1"]="x.x.x.x" GROUP1["SITE2"]="y.y.y.y" GROUP1["SITE3"]="z.z.z.z" GROUP2["SITE1"]="1.1.1.1" GROUP2["SITE2"]="2.2.2.2" GROUP2["SITE3"]="3.3.3.3" GROUP2["SITE1"]="a.a.a.a" GROUP2["SITE2"]="b.b.b.b" GROUP2["SITE3"]="c.c.c.c" read -p "Choose a group

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Can't figure out, whats causing error Parameter 3 to mysqli_stmt::bind_param() expected to be a reference, value given in... PDO $query = "INSERT INTO test (id,row1,row2,row3) VALUES (?,?,?,?)"; $params = array(1,"2","3","4"); $param_type = "isss"; $sql_stmt = mysqli_prepare ($mysqli, $query); call_user_func_array('mysqli_stmt_bind_param', array_merge(array($sql_stmt, $param_type), $params)); mysqli_stmt_execute($sql_stmt); Also tried OOP OOP $insert_stmt = $mysqli->prepare($query); array_unshift($params, $param_type); call_user_func_array

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am trying to insert an array into a php file . However I am able to insert the array into a php file but the format is not as desired . We have 2 files File1.php <?php include_once("../dc/dcCommonLib.php"); include_once("../dc/persistence/UserData.php"); require_once("../../lib/include/connect.inc.php"); $_SESSION["survey"] = "BestBuyAug2012"; $idLink = dbconnect($_SESSION["survey"]); $surveyWidget = rendererSurveyLoadHandler(); setDataToSession("surveywidget",$surveyWidget); $userData = &UserData::getInstance(); $userData->setSurvey(

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am currently using cake's routes config in order to set up admin views, different from that of the non-admin user. I read the routing chapter of the documentation(cake's), and stumbled upon the prefix routing. Which I thought that it is something I need to use, to accomplish what I need. So I started it with setting up the config/core.php as suggested, and uncommented this Configure::write('Routing.prefixes', array('admin')); Then, I added a route in the routes.php : Router::connect('/admin', array('controller' => 'donors', 'action' =>

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: from sympy import * from scipy import * from scipy.integrate import quad import scipy.optimize as optimize import numpy as np import collections import math from scipy.optimize import leastsq file= DATA+'Union21.dat' with open(file, "r") as f: data0=[(float(v[1]),float(v[2]), float(v[3])) for v in [x.split() for x in f.readlines()][1:]] #print data0 z=np.array([float(t[0]) for t in data0]) mu=np.array([float(t[1]) for t in data0]) dmu=np.array([float(t[2]) for t in data0]) c=3*10^8 def calka(x, OmM): return 1./math.sqrt(OmM*(1.+x)**3 + (1.

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm declaring an array of strings very simply, hard-coded, but it keeps giving me the array type has incomplete element type error. I guess this has something to do with the length of each array but I don't know how to fix it without setting a fixed length for the strings. char allocate[][2][] = { // Error with or without the 2 {"value1","value2"}, {"value3","value4"} }; 回答1: That syntax isn't valid. If you want a true multi-dimensional array, all the dimensions must be specified, except the first one. (The compiler must know how big the

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Here's the question: Can one View Controller add another View Controller as an Observer to the defaultCenter before the second view has been loaded? I have a model class that creates a NSURLSession , grabs some data, builds an array, and sends notifications that it's done (along with a pointer to the array). My app loads with a Map View that instantiates the model, calls the method to create the array, listens for the notification, and drops pins using the array. I have a Table View tab that I want to load using the array built by the map.

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm trying to fit a 2-d voigt profile to a subsection of an image (impart), where position is an array that holds the corresponding x and y coordinates in the whole image for impart. The following code seems to me like it really ought to work, based on the output of the two print statements. Also, if anyone has any quick suggestions on how to construct the position array faster, I'd appreciate some advice with numpy ndarrays. I'm still a little new to them. import numpy as np from scipy.special import wofz from scipy.optimize import curve

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: If I declare int Array[10]; in file1.c In file2.c if I I have a function like this extern int *Array; fun() { Array[0]=10; } Is there any problem with this or not? 回答1: Yes there is a problem. You are declaring a Array to be a pointer , while instead it's an array . The two are very distinct objects and here you're basically providing false information to the compiler. Note that the C syntax to access an element is Array[0] in both cases, but if Array is a pointer variable the machine code needed will be different from if Array is instead an