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Narrowing conversions in C++0x. Is it just me, or does this sound like a breaking change?

由 最后都变了- 提交于 2019-11-26 19:57:49
C++0x is going to make the following code and similar code ill-formed, because it requires a so-called narrowing conversion of a double to a int . int a[] = { 1.0 }; I'm wondering whether this kind of initialization is used much in real world code. How many code will be broken by this change? Is it much effort to fix this in your code, if your code is affected at all? For reference, see 8.5.4/6 of n3225 A narrowing conversion is an implicit conversion from a floating-point type to an integer type, or from long double to double or float, or from double to float, except where the source is a

Create unique Poll/vote/survey in php

由 微笑、不失礼 提交于 2019-11-26 16:58:01
问题 The unique poll/vote/survey i mean here is, user can only vote once. How do i do that? Track their ip? Login? Beside login, what else? (login is my last option, thus beside login, is there anything else I can do?) 回答1: To restrict the number of votes per person, you need to track the person. Now there can be several ways to do that, and I'll list them with their pros and cons. Its for you to decide which method suits you best. login: this will offer you ultimate control. But its also a little

Narrowing conversions in C++0x. Is it just me, or does this sound like a breaking change?

由 独自空忆成欢 提交于 2019-11-26 07:28:32
问题 C++0x is going to make the following code and similar code ill-formed, because it requires a so-called narrowing conversion of a double to a int . int a[] = { 1.0 }; I\'m wondering whether this kind of initialization is used much in real world code. How many code will be broken by this change? Is it much effort to fix this in your code, if your code is affected at all? For reference, see 8.5.4/6 of n3225 A narrowing conversion is an implicit conversion from a floating-point type to an integer
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