append

List.append() changing all elements to the appended item [duplicate]

由 徘徊边缘 提交于 2020-01-19 12:43:50
问题 This question already has answers here : Why does foo.append(bar) affect all elements in a list of lists? [duplicate] (3 answers) Closed 2 years ago . I seem to have a problem with my maze generating program made in Python. I'm trying to randomly create a path that branches out at select points, with the points getting stored as it goes along. When the maze gets to a dead end, it will sort back through the visited points by testing the top value than popping that and going to the next one,

会计凭证BAPI_ACC_DOCUMENT_POST

由 自闭症网瘾萝莉.ら 提交于 2020-01-19 09:56:00
*&---------------------------------------------------------------------* *& Report ZFIFB107 *& Description 薪酬计提批导开发 *&---------------------------------------------------------------------* *& 开发人员 时间 更改类型 描述 *& CR信息 *&---------------------------------------------------------------------* *& WuLiang 20140904 ECDK901469 FI-FI107-薪酬计提批导开发 *&---------------------------------------------------------------------* REPORT ZFIB107. TYPE-POOLS: SLIS. TABLES: SSCRFIELDS. DATA: T_FILE TYPE STRING, T_PATH TYPE STRING, T_FULLPATH TYPE STRING, T_USER_ACTION TYPE I, T_FILE_ENCODING TYPE ABAP_ENCOD. DATA: IT

为什么 StringBuilder 不是线程安全的？

由 此生再无相见时 提交于 2020-01-17 11:54:12
面试官：StringBuilder和StringBuffer的区别在哪？ 我：StringBuilder不是线程安全的，StringBuffer是线程安全的 面试官：那StringBuilder不安全的点在哪儿？ 我：。。。（哑巴了） 在这之前我只记住了StringBuilder不是线程安全的，StringBuffer是线程安全的这个结论，至于StringBuilder为什么不安全从来没有去想过。 分析 在分析这个问题之前我们要知道StringBuilder和StringBuffer的内部实现跟String类一样，都是通过一个char数组存储字符串的，不同的是String类里面的char数组是final修饰的，是不可变的，而StringBuilder和StringBuffer的char数组是可变的。 首先通过一段代码去看一下多线程操作StringBuilder对象会出现什么问题。StringBuffer 和 StringBuilder 的 3 个区别！这篇也要看下。 public class StringBuilderDemo { public static void main(String[] args) throws InterruptedException { StringBuilder stringBuilder = new StringBuilder(); for

Append vs. redefining variable in Python

由 和自甴很熟 提交于 2020-01-17 04:32:06
问题 First let me preface my question with an apology if this has been answered somewhere else. I reviewed a few of the questions Stack Overflow suggested, but none of them contained the answer I'm looking for. I am also more interested in why this is happening than any workarounds to avoid the problem. I tried answering my own question, but I was only able to reduce the problem to a simpler one. Anyway, can someone please help me understand the difference between the two sets of code below that

NSMutableString returns null

由 我只是一个虾纸丫 提交于 2020-01-17 03:34:28
问题 I'm trying to construct a string from the file names in my app's document folder. So far I have: NSArray *directoryPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [directoryPaths objectAtIndex:0]; NSError *error = nil; NSArray *directoryContent = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:documentsDirectory error:&error]; NSLog(@"contents of document folder = %@", directoryContent); This prints: contents of

Appending scripts to head using javascript - weird behavior

由 耗尽温柔 提交于 2020-01-17 02:42:07
问题 The problem I'm trying to solve is an ad loading script, that loads the ad code with jsonp and inserts it into the dom. Now sometimes the ad code will include javascript tags, and i figured it was just a matter of moving them to the head section and they would run. In theory that works fine but when i made a script to move script tags to the head i ran into some weird behavior. So I wrote this code to test just the script moving part, eliminating the rest of the code as an error source. I get

android文件存储的4种方式

由 老子叫甜甜 提交于 2020-01-16 18:50:42
Context.MODE_PRIVATE ：为默认操作模式，代表该文件是私有数据，只能被应用本身访问，在该模式下，写入的内容会覆盖原文件的内容，如果想把新写入的内容追加到原文件中。可以使用Context.MODE_APPEND Context.MODE_APPEND ：模式会检查文件是否存在，存在就往文件追加内容，否则就创建新文件。 Context.MODE_WORLD_READABLE和Context.MODE_WORLD_WRITEABLE用来控制其他应用是否有权限读写该文件。 MODE_WORLD_READABLE ：表示当前文件可以被其他应用读取； MODE_WORLD_WRITEABLE ：表示当前文件可以被其他应用写入。 如果希望文件被其他应用读和写，可以传入： openFileOutput("itcast.txt", Context.MODE_WORLD_READABLE + Context.MODE_WORLD_WRITEABLE); android有一套自己的安全模型，当应用程序(.apk)在安装时系统就会分配给他一个userid，当该应用要去访问其他资源比如文件的时候，就需要userid匹配。默认情况下，任何应用创建的文件，sharedpreferences，数据库都应该是私有的（位于/data/data/<package name>/files）

click to replace value, shift + click to append value using jquery

由 我们两清 提交于 2020-01-16 17:29:29
问题 I have a list with items. When I click any of these items, I copy its id -value into a form text -field. Everytime I click, it replaces the value, which is correct by default. But what I would like to add, is a way for the user to hold down a key on their keyboard, and when they then click, they just .append whatever they just clicked into the same form field. Here's my jQuery-code I'm using for the first/default scenario: $(function(){ $('ul#filter-results li').click(function(){ var from = $

click to replace value, shift + click to append value using jquery

由 空扰寡人 提交于 2020-01-16 17:28:43
问题 I have a list with items. When I click any of these items, I copy its id -value into a form text -field. Everytime I click, it replaces the value, which is correct by default. But what I would like to add, is a way for the user to hold down a key on their keyboard, and when they then click, they just .append whatever they just clicked into the same form field. Here's my jQuery-code I'm using for the first/default scenario: $(function(){ $('ul#filter-results li').click(function(){ var from = $

Appending ten digit integer to list concatenates some entries with an “L”

由 泪湿孤枕 提交于 2020-01-16 04:31:33
问题 I wrote a small script to find n-digit primes in the digits of e (in relation to that old Google ad): import math # First 251 digits of e e_digits = ("2" "7182818284 5904523536 0287471352 6624977572 4709369995" "9574966967 6277240766 3035354759 4571382178 5251664274" "2746639193 2003059921 8174135966 2904357290 0334295260" "5956307381 3232862794 3490763233 8298807531 9525101901" "1573834187 9307021540 8914993488 4167509244 7614606680") e_digits = e_digits.replace(" ", "") digits = int(raw
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