汇编代码文件如下： section .bss section .data section .text global _gettsc _gettsc: rdtsc rol rdx,32 or rdx,rax mov rax,rdx ret C/C++代码文件如下： #include <stdio.h> extern unsigned long _gettsc(); int main() { unsigned long count = _gettsc(); return 0; } 如果c++代码文件命名为.cpp则按照C++去编译链接会报错： nasm -f elf64 -F stabs -Ox standerd.asm -o standerd.asm.o make: Circular standerd.asm <- standerd.asm.o dependency dropped. g++ -lpthread -I./ -masm=intel -O3 main.cxx.o standerd.asm.o -o test main.cxx.o: In function `main': main.cpp:(.text.startup+0x5): undefined reference to `_gettsc()' collect2: error: ld returned 1 exit status make: *** [all] Error 1 makefile:19: recipe for target 'all' failed 如果C/C++代码文件改名为.c按照c语言去编译链接则不会报错 请问有什么解决办法吗？

/* 优化生成的汇编代码很容易就能够看出max对应的值以及相关循环控制 * 而未优化生成的汇编代码没有对应的max值?```cmpq -8(%rbp), %rax``` * 看了半天都感觉这个是无限循环啊，%rax(这个也没溢出啊)总是大于-8(%rbp)(为0)的，jl .L3就 * 一直循环。*/ #include <stdio.h> #include <math.h> int main(int argc, const char *argv[]) { long i, max; long sum = 0; max = (long)pow(2,32); for (i = 0; i < max; i++) { sum += i; } printf("%ld\n", sum); return 0; } 用gcc -S main.c生成的汇编代码为： .file "main.c" .section .rodata .LC0: .string "%ld\n" .text .globl main .type main, @function main: .LFB0: .cfi_startproc pushq %rbp .cfi_def_cfa_offset 16 .cfi_offset 6, -16 movq %rsp, %rbp .cfi_def_cfa_register 6 subq $48, %rsp movl %edi, -36(%rbp) movq %rsi, -48(%rbp) movq $0, -16(%rbp) movl $0, -8(%rbp) movl $1, -4(%rbp) movq $0, -24(%rbp) jmp .L2 .L3: movq -24(%rbp), %rax addq %rax, -16(%rbp) addq $1, -24(%rbp) .L2: movq -24(%rbp), %rax cmpq -8(%rbp), %rax jl .L3 movl $.LC0, %eax movq -16(%rbp), %rdx movq %rdx, %rsi movq %rax, %rdi movl $0, %eax call printf movl $0, %eax leave .cfi_def_cfa 7, 8 ret .cfi_endproc .LFE0: .size main, .-main .ident "GCC: (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3" .section .note.GNU-stack,"",@progbits 而优化gcc -S -O1 main.c后的汇编代码为： 全选复制放进笔记 .file "main.c" .section .rodata.str1.1,"aMS",@progbits,1 .LC0: .string "%ld\n" .text .globl main .type main, @function main: .LFB29: .cfi_startproc subq $8, %rsp .cfi_def_cfa_offset 16 movl $0, %eax movabsq $4294967296, %rdx .L2: addq $1, %rax cmpq %rdx, %rax jne .L2 movabsq $9223372034707292160, %rdx movl $.LC0, %esi movl $1, %edi movl $0, %eax call __printf_chk movl $0, %eax addq $8, %rsp .cfi_def_cfa_offset 8 ret .cfi_endproc .LFE29: .size main, .-main .ident "GCC: (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3" .section .note.GNU-stack,"",@progbits

import {createElement, Component, render} from 'rax'; import {Tabbar, View,TextInput,Button,Modal} from 'nuke'; import Module from '../lib/module'; class Index extends Module { state = { searchKey: '' } searchTrade(){ console.log(this.state.searchKey); } render() { return ( <View style={{flex: 1}}> <TextInput placeholder="买家昵称/订单号" maxLength="50" style={{width:'750rem',height:'50rem',borderLeft:'1rem',borderRight:'1rem',borderTop:'1rem',borderBottom:'1rem'}} value={this.state.searchKey} onBlur={(e) => { console.log('onBlur================================='); this.setState({ searchKey: e.value }); }} /> <Button onPress={() => { this.searchTrade(); }}>搜索</Button> </View> ); } } render(<Index />);

测试环境手机: 小米4Android: 6.01WeexVersion: 0.11.0千牛: 5.9.7测试代码如下'use strict'; import {createElement, Component, render} from 'rax'; import {View, Text, Modal} from 'nuke'; import QN from 'QAP-SDK'; class Demo extends Component { constructor(props) { super(props); this.state = {}; } componentDidMount() { QN.fetch('http://baidu.com', { method: 'put' }); } render() { return ( <View style={styles.container}> <Text style={styles.welcome}> 欢迎使用千牛! </Text> <Text style={styles.instructions}> 编辑src/index.jsx文件，开始QAP之旅， </Text> <Text style={styles.instructions}> 点击手机千牛右上角刷新， </Text> <Text style={styles.instructions}> 或者刷新浏览器立即查看效果 </Text> </View> ); } } const styles = { container: { flex: 1, justifyContent: 'center', alignItems: 'center', backgroundColor: '#F5FCFF', }, welcome: { fontSize: 20, textAlign: 'center', margin: 10, }, instructions: { textAlign: 'center', color: '#333333', marginBottom: 5, }, }; render(<Demo />); export default Demo; 使用Charles抓包显示method 是 POST类型, 使用DELETE也一样的抓包结果iOS 10请求正常

iPhone:10.3WeexVersion: 0.9.5千牛 5.9.3 'use strict'; import {createElement, Component, render} from 'rax'; import {View, Text, Modal, TextInput} from 'nuke'; import QN from 'QAP-SDK'; class Demo extends Component { constructor(props) { super(props); } render() { return ( <View style={styles.container}> <Text style={styles.welcome}> 欢迎使用千牛! </Text> <Text style={styles.instructions}> 编辑src/index.jsx文件，开始QAP之旅， </Text> <TextInput value="test" style={styles.input}></TextInput> </View> ); } } const styles = { container: { flex: 1, justifyContent: 'center', alignItems: 'center', backgroundColor: '#F5FCFF', }, welcome: { fontSize: 20, textAlign: 'center', margin: 10, }, instructions: { textAlign: 'center', color: '#333333', marginBottom: 5, }, input: { width: '500rem', height: '56rem', backgroundColor: '#fff', } }; render(<Demo />); export default Demo; 如上面代码, 即使 <TextInput value="2" style={styles.input}></TextInput>还是能修改input的值 所以如果input的onChange事件里对input绑定的state属性进行修改的话如果前后两次state都是相同的话, input的value并不会改变, 'use strict'; import {createElement, Component, render} from 'rax'; import {View, Text, Modal, TextInput} from 'nuke'; import QN from 'QAP-SDK'; class Demo extends Component { constructor(props) { super(props); this.state = { value: 'abc', }; } onChangeWithTextInput = () => { console.time('input'); this.setState({value: 'test'}); //this.setState({value: Math.random() > 0.5 ? '1' : '0'})这样没问题 } render() { return ( <View style={styles.container}> <Text style={styles.welcome}> 欢迎使用千牛! </Text> <Text style={styles.instructions}> 编辑src/index.jsx文件，开始QAP之旅， </Text> <Text>{this.state.value}</Text> <TextInput value={this.state.value} onChange={this.onChangeWithTextInput} style={styles.input}></TextInput> </View> ); } } const styles = { container: { flex: 1, justifyContent: 'center', alignItems: 'center', backgroundColor: '#F5FCFF', }, welcome: { fontSize: 20, textAlign: 'center', margin: 10, }, instructions: { textAlign: 'center', color: '#333333', marginBottom: 5, }, input: { width: '500rem', height: '56rem', backgroundColor: '#fff', } }; render(<Demo />); export default Demo;

测试环境iPhone:10.2.1-iOSweex_sdk: 0.9.5qap-cli: 3.0.16千牛版本: 测试版 5.8.2.1 TextInput的value和state绑定, 每当TextInput输入的时候修改state的value, 就会失焦, 收起键盘 示例代码如下 'use strict'; import {createElement, Component, render} from 'rax'; import {View, Text , TextInput } from 'nuke'; import QN from 'QAP-SDK'; class Demo extends Component { constructor(props) { super(props); this.state = { value: "" }; this.onInput = this.onInput.bind(this); } onInput(e) { this.setState({value: e.value}); } render() { return ( <View> <Text> onInput问题 </Text> <TextInput style={styles.input} value={this.state.value} onInput={this.onInput} /> </View> ); } } const styles = { input: { width: '300rem', height: '60rem', borderColor: '#000', borderWidth: '1rem', borderStyle: 'solid', } }; render(<Demo />); export default Demo;

我有一个dataframe，它是这样的: Col1 | Col2 | Col1 | Col3 | Col1 | Col4 a | d | | h | a | p b | e | b | i | b | l | l | a | l | | a l | r | l | a | l | x a | i | a | w | | i | c | | i | r | c d | o | d | e | d | o Col1在dataframe中重复多次。在每个Col1中，都有缺失的信息。我需要创建一个新列，其中包含来自每个Col1事件的所有信息。 我如何用完整的信息创建一个列，然后删除之前重复的列? 多个列中可能缺少某些信息。这个脚本还将在将来可能有一个、三个、五个或任意数量的重复Col1列时使用。 期望的输出是这样的: Col2 | Col3 | Col4 | Col5 d | h | p | a e | i | l | b l | l | a | a r | a | x | l i | w | i | a c | i | c | r o | e | o | d 我一直在寻找这个问题，但它是不清楚，我可以保持所需的Col1与完整的价值观。我可以删除相同名称的多个列，但我需要首先创建一个包含完整信息的列。 问题来源StackOverflow 地址：/questions/59384284/pandas-move-multiple-columns-with-the-same-name-and-different-missing-data-int

测试环境iPhone:10.2.1-iOSweex_sdk: 0.9.5qap-cli: 3.0.16千牛版本: 测试版 5.8.2.1在下面例子里 Children 组件的 componentWillReceiveProps 中执行了this.setState({anyValue: true}, () => console.log('componentWillReceiveProps end'));但是更新完状态 () => console.log('componentWillReceiveProps end')不会执行;/** @jsx createElement */ import { Env, Transition, Button } from 'nuke'; import {createElement, Component,findDOMNode,render} from 'rax'; import { View, Text,Image} from 'nuke'; const { isWeex, isWeb } = Env; class Childen extends Component { componentWillReceiveProps(nextProps) { console.log('componentWillReceiveProps begin'); this.setState({anyValue: true}, () => console.log('componentWillReceiveProps end')); } render() { console.log('Childen', this.state); return <View>Childen</View> } } class App extends Component { constructor(props){ super(props); this.state = {value: 1}; } componentDidMount() { this.setState({value: 2}, () => console.log(this.state)); } render() { return ( <Childen value={this.state.value} /> ); } } render(<App/>);

测试环境iPhone:10.2.1-iOSweex_sdk: 0.9.5qap-cli: 3.0.16千牛版本: 测试版 5.8.2.1比如先在input里输入 abc往下滚至input消失在回滚至input出现 input输入框已经被重置'use strict'; import {createElement, Component, render} from 'rax'; import {View, ListView, TextInput} from 'nuke'; class Demo extends Component { constructor(props) { super(props); this.state = { dataSource: [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2] }; } renderRow = (item) => { console.log(1); return <View style={{height: 200, width: 750}}>test</View> } renderHeader = () => { return ( <TextInput style={{width: 750, height: 60, borderWidth: 3}} /> ) } render() { return ( <View style={styles.container}> <ListView style={{width: 750, height: 1200}} renderHeader={this.renderHeader} renderRow={this.renderRow} dataSource={this.state.dataSource} /> </View> ); } } const styles = { container: { flex: 1, justifyContent: 'center', alignItems: 'center', backgroundColor: '#fff', } }; render(<Demo />); export default Demo;有什么办法解决吗?

render() { const {style,textStyle,iconStyle,showIcon,icon,width} = this.props; let textWrapStyle=width?{width:width,textAlign:"right"}:{}; let iconElem=String(showIcon).toLowerCase() ==="true"?(<Icon style={{width:'30rem',height:'30rem',marginLeft:'10rem'}} name='arrowDown' />):{}; return( <TouchableHighlight onPress={this.pressHandler.bind(this)} value="" style={[sty.dropdown,style]}> <view style={textWrapStyle}> <Text style={[{fontSize:"28rem",color:"#666666",lines:1,textOverflow:'ellipsis'},textStyle]} textOverflow="true">{this.state.text}</Text> </view> {iconElem} </TouchableHighlight>); } iconfont问题 import {createElement, Component,render} from 'rax';import { View, Text, TouchableHighlight, Modal,Picker,Icon,Iconfont} from 'nuke';import {Enum} from 'common/dp/index.jsx';import sty from "./index.less" class Dropdown extends Component { constructor(props) { super(props); Iconfont({name:"iconfont1",url:"http://at.alicdn.com/t/font_1474198576_7440977.ttf"}); //初始化属性值 this.props.value=String(this.props.value); let current=null; //source 提出警告 if(!props.source.length){ throw new Error("warning:source is null") }; this.enum=new Enum; this.state = {} //设置数据 this.setData(props); } setData(props){ this.enum.setEnum("source",props.source); let current= props.value!=null?this.enum.getItemByKey("source",props.value):{}; this.state.text =current&&current.value; this.state.value =current&&current.key; } static defaultProps = { name:"", source: [], value: null, onChange:(e)=>{ console.log("change")}, style:{}, showIcon:true, icon:"arrowDown", textStyle:{}, iconStyle:{}, width:null } pressHandler(){ var self=this; Picker.show({title:'请选择',dataSource:this.props.source,maskClosable:true,selectedKey:this.state.value}, function(data){ let result=data.length&&data[0]; if(self.state.value!=result.key){ self.props.onChange(result) } self.setState({value:result.key,text:result.value}) }); } render() { const {style,textStyle,iconStyle,showIcon,icon,width} = this.props; let textWrapStyle=width?{width:width,textAlign:"right"}:{}; let iconElem=String(showIcon).toLowerCase() ==="true"?(<Icon style={{width:'30rem',height:'30rem',marginLeft:'10rem'}} name='arrowDown' />):{}; let item= {"icon":"\ue600","name":"直播"}; return( <TouchableHighlight onPress={this.pressHandler.bind(this)} value="" style={[sty.dropdown,style]}> <view style={textWrapStyle}> <Text style={[{fontSize:"28rem",color:"#666666",lines:1,textOverflow:'ellipsis'},textStyle]} textOverflow="true">{this.state.text}</Text> </view> {iconElem} <View style={style.iconCell}> <Text style={style.icon1}>{item.icon}</Text> <Text style={style.iconCellText}>{item.name}</Text> </View> </TouchableHighlight>); } componentWillReceiveProps(nextProps){ this.setData(nextProps); this.setState({}); } } const style={ iconCell:{ paddingLeft:'40rem', paddingRight:'40rem' }, icon1:{ fontFamily: 'iconfont1', fontSize: '36rem', marginBottom:'40rem', color:'blue', alignItems:'center' }, iconCellText:{ fontSize: '20rem', color:'#999999', alignItems:'center' } } export default Dropdown;