symbols

Symbol visibility using g++

馋奶兔 提交于 2019-11-30 13:53:35
I compiled a C++ library under Linux/Mac with its symbols hidden. I've used _ attribute _ ((visibility("hidden"))) for all my classes and compiled with options (-c -O2 -fPIC -MMD -MP -MF). Under Mac, using MacDependencies (http://code.google.com/p/macdependency/), the job is done just fine as I see only my exports (I actually saw the difference before and after). However, I noticed that using nm I still see all the names of the symbols. This happens under both Mac and Linux. Why is that? Is there any way to avoid this? Best Regards and thanks, Joe Public or hidden, symbols are still there. nm

How can i get currency symbols from currency code in iphone?

痞子三分冷 提交于 2019-11-30 12:33:52
问题 I have get currency code (Eg: USD, EUR, INR) from webservice response. I need to show the currency symbols for the corresponding currency code. If the currency code is USD, i need to show $, if the currency code is EUR i need to show €. How can i do this? Please suggest any idea or sample code to do this. Please help me. Thanks in advance. 回答1: This code works charm in my project. I will share this to you all. NSString *currencyCode = @"EUR"; NSLocale *locale = [[[NSLocale alloc]

In Clojure, how to define a variable named by a string?

我怕爱的太早我们不能终老 提交于 2019-11-30 11:28:35
问题 Given a list of names for variables, I want to set those variables to an expression. I tried this: (doall (for [x ["a" "b" "c"]] (def (symbol x) 666))) ...but this yields the error java.lang.Exception: First argument to def must be a Symbol Can anyone show me the right way to accomplish this, please? 回答1: Clojure's "intern" function is for this purpose: (doseq [x ["a" "b" "c"]] (intern *ns* (symbol x) 666)) 回答2: (doall (for [x ["a" "b" "c"]] (eval `(def ~(symbol x) 666)))) In response to your

What does # (pound sign) mean in type signatures?

牧云@^-^@ 提交于 2019-11-30 11:17:50
What does # mean in type signatures like seq<#seq<'a>> compared to just seq<seq<'a>> ? This is called flexible type . The short summary is that #type means any type that is inherited from type . So, in your concrete example seq<#seq<'a>> will be a sequence of any collections containing 'a values. When calling a function, F# automatically casts concrete types to interfaces - so for example, you can call a function taking seq<'a> with array 'a[] as an argument. However, this does not work when you have array of arrays - because 'a[][] only implements seq<'a[]> but not seq<seq<'a>> . For example,

What are the meanings of the columns of the symbol table displayed by readelf?

一曲冷凌霜 提交于 2019-11-30 10:21:38
问题 Could someone explain the columns shown of the symbol table using readelf ? 回答1: Consider the following: Symbol table .symtab contains 1203 entries: Num: Value Size Type Bind Vis Ndx Name 310: a0008120 0 NOTYPE GLOBAL DEFAULT ABS _gp 734: a0000010 32 OBJECT GLOBAL DEFAULT 77 v 818: 9d000018 496 FUNC GLOBAL DEFAULT 71 main 849: a0000124 4 OBJECT GLOBAL DEFAULT 78 phrase 955: a0000000 9 OBJECT GLOBAL DEFAULT 77 peppers 1020: a000023c 192 OBJECT GLOBAL DEFAULT 80 bins Num: = The symbol number

Cannot find Symbol: Java [duplicate]

微笑、不失礼 提交于 2019-11-30 10:01:50
问题 This question already has answers here : What does a “Cannot find symbol” or “Cannot resolve symbol” error mean? (13 answers) Closed 2 years ago . I'm sorry if this is a weird question but I've just started OOP and ran across this problem for a simple menu driven math program that I was supposed to make. I cleared all the errors the compiler gave me but now it's given me about 14 fresh errors most of which are described as 'cannot find symbol.' Here's my code: import java.util.Scanner; public

How do I insert special characters as text in XML editor for Android?

醉酒当歌 提交于 2019-11-30 09:52:46
So, I'm writing an app that involves using some mathematical symbols. I'm doing this in the visual XML editor. Is there any way I can get, say, an integral symbol, or a "less than or equal to" symbol? Things like that. Thanks! Try put they as HTML. String htmlStringWithMathSymbols = "≤ ≥"; textView.setText(Html.fromHtml(htmlStringWithMathSymbols)); Here you can display your math symbol in textView Here the post http://www.hrupin.com/2011/12/how-to-put-some-special-math-symbols-in-textview-editview-or-other-android-ui-element Hope, it help you! Use < for <, > for > and & for &. or < less than <

Unresolved external symbol C++

和自甴很熟 提交于 2019-11-30 09:23:39
问题 I ahve a problem with a code below: ProgrammSettings.h #pragma once static class ProgrammSettings { public: static int fd; }; Settings.cpp #include "ProgrammSettings.h" static bool LoadSettings() { ProgrammSettings::fd = 2; // here error Unresolved symbol!! return true; } What i'm doing wrong? Thanks! 回答1: Unlike instance variables that require only a declaration, static member variabs of the class must also be defined . Currently, your code contains only a declaration. Add a definition of

Ruby Symbols vs Strings in Hashes

不羁的心 提交于 2019-11-30 08:49:56
I have this hash: { "title"=>"Navy to place breath-test machines on all its ships", "url"=>"http://feeds.washingtonpost.com/click.phdo?i=a67626ca64a9f1766b8ba425b9482d49" } It turns out that hash[:url] == nil and hash['url'] == "http://feeds.washingtonpost.com/click.phdo?i=a67626ca64a9f1766b8ba425b9482d49" Why? Shouldn't it work with either? Since a symbol is not the same as a string: :url == 'url' #=> false As hash keys they would be different. Perhaps you have seen this behavior in Rails? Ruby on Rails uses HashWithIndifferentAccess which maps everything to a String internally, so you can do

LLDB: add symbols file?

大憨熊 提交于 2019-11-30 08:48:17
I'm trying to debug an android native app from Android Studio's native debugging using lldb. My native app contains one libmain.so that is compiled and run by Android Studio and another external libother.so compiled by me. when debugging, I am able to set breakpoints in libmain.so but not libother.so. Both shared objects are stripped but somehow Android Studio makes lldb know about the unstripped version of libmain.so. I want to do the same for libother.so. What command do I need to give lldb so that it would load the symbols from an unstripped file on my local machine? When I do image list I