foo

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 have the following example of HTML: Foo bar lorem ipsum etc Bar baz dum dum dum poopfiddles I'm looking to extract all paragraphs following the 'Foo bar' header, until I reach the 'Bar baz' header (the text for the 'Bar baz' header is unknown, so unfortunately I can't use the answer provided by bougyman). Now I can of course using something like //h2[text()='Foo bar']/following::p but that of course will grab all paragraphs following this header. So I have the option to traverse the nodeset and push paragraphs into an Array until the text

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: In foo/CMakeLists.txt , based on this and this , I have the following SET (EXTERNAL_LIB_ROOT "../../external_libs/") ADD_LIBRARY (avcodec-debug STATIC IMPORTED) SET_PROPERTY ( TARGET avcodec-debug PROPERTY IMPORTED_LOCATION ${EXTERNAL_LIB_ROOT}/libavcodec-0.8.10.a) In bar/CMakeLists.txt I have this: # old way uses system libraries #TARGET_LINK_LIBRARIES (bar avformat avcodec avutil) # new way uses local debug builds TARGET_LINK_LIBRARIES (bar avformat avcodec-debug avutil) When I run make I get /usr/bin/ld: cannot find -lavcodec-debug If I

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: Is it possible to set a fact containing an array in ansible using set_fact ? What's the correct syntax for it? 回答1: Indeed it is. You need to quote the entire array though: - name: set fact set_fact: foo="[ 'one', 'two', 'three']" - name: debug debug: msg={{ item }} with_items: foo The above tasks should generate the following output: TASK: [set fact] ************************************************************** ok: [localhost] TASK: [debug] ***************************************************************** ok: [localhost] => (item=one) => {

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: My XML looks like this: <foo> <bar name="a"> <baz name="xyz"> <time>2</time> <date>3</date> </baz> </bar> <bar name="b"> <baz name="xyz"> <time>2</time> <date>3</date> </baz> </bar> <bar name="c"> <baz name="xyz"> <time>2</time> <date>3</date> </baz> </bar> </foo> I am writing an XSL that needs to function like this: If all the baz children are same then doSomething else doSomethingElse . My current node is foo . I am new to XSLT and I am aware of the conditionals in XSL. It looks something like this as of now: <xsl:template match="foo">

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 using Django v1.9.4 with PostgreSQL 9.2.14 behind. With the following models: from django.db import models from django.contrib.contenttypes.fields import GenericRelation, GenericForeignKey from django.contrib.contenttypes.models import ContentType class Foo(models.Model): content_type = models.ForeignKey(ContentType) object_id = models.PositiveIntegerField() bar = GenericForeignKey('content_type', 'object_id') class Bar(models.Model): foos = GenericRelation(Foo, related_query_name='bars') class Meta: abstract = True class BarX(Bar): name

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): 由 翻译 强力驱动 问题: How do I create and iterate through a hash of hashes in TCL? If I have data like: foo = { a => { aa => { aa1 aa2 aa3 } ab => { ab1 ab2 ab3 } ac => { ac1 ac2 ac3 } } b => { ba => { ba1 ba2 ba3 } bb => { bb1 bb2 bb3 } bc => { bc1 bc2 bc3 } } c => { ca => { ca1 ca2 ca3 } cb => { cb1 cb2 cb3 } cc => { cc1 cc2 cc3 } } } How do I create such a hash by inserting one leaf-node data item at a time. Something like: lappend foo(a)(ab) "ab1" Then how do I iterate over all data elements? like: foreach key in foo { foreach sub_key in foo ( $key

基本用法 // get和set语法将对象属性绑定到函数，访问/赋值时函数会被调用 let nums = { all: [], get curr () { let len = this .all.length return this .all[len - 1 ] }, set curr (val) { this .all.push(val) } } nums.curr // undefined，调用getter nums.curr = 1 // 调用setter nums.curr // 1 // 相当于创建了一个伪属性(pseudo-property)，可以使用delete删除 delete nums.curr 属性名要求是number/string/symbol let s = Symbol( 'foo' ) let nums = { getter 1 () { return 1 }, getter [ 'a' + 'b' ] () { return 2 }, getter [s] () { return 3 } } Object .getOwnPropertyNames(nums) // ['1', 'ab']，属性'1'会提到最前面 Object .getOwnPropertySymbols(nums) // [Symbol(foo)] getter没有参数

Ŀ¼ property 组合指的是一个对象中的属性，该属性的值指向的是另一个对象。 组合的目的和继承一样，为了减少代码冗余 class People: def __init__(self,name,age,sex): self.name=name self.age=age self.sex=sex class Teacher(People): def __init__(self,name,age,sex): super().__init__(name,age,sex) class Student(People): def __init__(self,name,age,sex): super().__init__(name,age,sex) class Date: def __init__(self,year,month,day): self.year=year self.month=month self.day=day def tell_birth(self): print(f''' ===出生年月日=== 年：{self.year} 月：{self.month} 日：{self.day}''') tea1=Teacher('tank',17,'male') date_obj=Date(2002,1,1) tea1.date=date_obj

function foo() { this.name = 'andy' ; let vvv = 'vvvvvvvvvvv' ; foo.watermelon = '西瓜' ; foo.prototype.sex = 'GG' ; } foo.banana = '香蕉' ; foo.prototype.test = 'test' ; let foo1 = new foo(); // `foo1`;上有哪些属性,这些属性分别挂载在哪个地方 ？ foo.prototype.test = 'test2'; // 重新赋值 思考之后再看解释： 思考之后再看解释： 思考之后再看解释： 思考之后再看解释： 思考之后再看解释： 思考之后再看解释： 思考之后再看解释： 思考之后再看解释： 思考之后再看解释： function foo() { this.name = 'andy' //foo对象本身的属性 let vvv = 'vvvvvvvvvvv' //foo对象体的变量而已，跟foo没啥关系 foo.watermelon = '西瓜' //此方式是设置为foo的静态属性，只能通过foo.obkoro1 调用，跟foo的实例没关系 foo.prototype.sex = 'GG' //设置foo原型属性，其挂载在原型对象上即：foo.prototype对象上(foo.prototype是个对象

Object.prototype.objCustom = function() {}; Array.prototype.arrCustom = function() {}; let iterable = [3, 5, 7]; iterable.foo = 'hello'; for (let i in iterable) { console.log(i); // 0, 1, 2, "foo", "arrCustom", "objCustom" } for (let i in iterable) { if (iterable.hasOwnProperty(i)) { console.log(i); // 0, 1, 2, "foo" } } for (let i of iterable) { console.log(i); // 3, 5, 7 } for...in 还是 for...of 语句都是迭代一些东西。它们之间的主要区别在于它们的迭代方式。 for...in 语句以任意顺序迭代对象的 可枚举属性 。 for...of 语句遍历 可迭代对象 定义要迭代的数据。 每个对象将继承 objCustom 属性，并且作为 Array 的每个对象将继承 arrCustom 属性，因为将这些属性添加到 Object.prototype 和 Array.prototype 。由于 继承和原型链