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Memory address of variables in Java
Please take a look at the picture below.
When we create an object in java with the new keyword, we are getting a memory address from the OS.
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delete a.x vs a.x = undefined
... The main difference is that setting
a.x = undefined
means that a.hasOwnProperty("x") will still return true, and therefore, it will still show up in a for in loop, and in Object.keys()
delete a.x
means that a.hasOwnProperty("x") will return false
The way that they are the same is that you ca...
Web-scraping JavaScript page with Python
I'm trying to develop a simple web scraper. I want to extract text without the HTML code. In fact, I achieve this goal, but I have seen that in some pages where JavaScript is loaded I didn't obtain good results.
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Evaluate empty or null JSTL c tags
How can I validate if a String is null or empty using the c tags of JSTL ?
8 Answers
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In Bash, how to add “Are you sure [Y/n]” to any command or alias?
In this particular case, I'd like to add a confirm in Bash for
17 Answers
17
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CSS force image resize and keep aspect ratio
I am working with images, and I ran across a problem with aspect ratios.
23 Answers
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Bash mkdir and subfolders [duplicate]
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You can:
mkdir -p folder/subfolder
The -p flag causes any parent directories to be created if necessary.
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vim 命令与快捷键 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...A:行末o:光标后插入新行O:光标上插入新行定位h:leftj:downk:upl:right$:行尾0：行首H:...:set nu 设置行号
插入命令
i：光标后
I：行首
a:光标前
A:行末
o:光标后插入新行
O:光标上插入新行
定位
h:left
j:down
k:up
l:right
$:行尾
0：...
What is the difference between ng-app and data-ng-app?
... AngularJS and am confused about what the differences are between the ng-app and data-ng-app directives.
7 Answers
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How can I find the number of days between two Date objects in Ruby?
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edited Dec 16 '13 at 6:29
dylanfm
6,12055 ...