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In Typescript, How to check if a string is Numeric
...y to convert a string to a number is with Number, not parseFloat.
Number('1234') // 1234
Number('9BX9') // NaN
You can also use the unary plus operator if you like shorthand:
+'1234' // 1234
+'9BX9' // NaN
Be careful when checking against NaN (the operator === and !== don't work as expected wi...
What does @@variable mean in Ruby?
... preceded with an at sign is that it is an instance variable, like this in PHP:
5 Answers
...
Get user info via Google API
...re": "xx",
"gender": "xx",
"locale": "xx"
}
To Tahir Yasin:
This is a php example.
You can use json_decode function to get userInfo array.
$q = 'https://www.googleapis.com/oauth2/v1/userinfo?access_token=xxx';
$json = file_get_contents($q);
$userInfoArray = json_decode($json,true);
$googleEmai...
实战做项目如何选择开源许可协议（一）-了解协议 - 开源 & Github - 清泛网...
...所有国家。假如你在美国，许可是从印度授权的，也没有问题。
3）授权免费 无版税， 前期、后期均无任何费用。
4）授权无排他性 任何人都可以获得授权
5）授权不可撤消 一旦获得授权，没有任何人可以取消。比如，你基...
Regex using javascript to return just numbers
... the non-digit characters (\D or [^0-9]):
let word_With_Numbers = 'abc123c def4567hij89'
let word_Without_Numbers = word_With_Numbers.replace(/\D/g, '');
console.log(word_Without_Numbers)
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Does java.util.List.isEmpty() check if the list itself is null? [duplicate]
...I deleted my stupid comment, before I saw your answer. Maybe he comes from PHP where we have !empty($foo) as somewhat an alias for isset($foo) && $foo != "".
– Aufziehvogel
Jul 16 '12 at 20:39
...
用Javascript获取页面元素的位置（全） - 更多技术 - 清泛网 - 专注C/C++及内核技术
... }
}
}
但是，这个函数有一个问题。如果网页内容能够在浏览器窗口中全部显示，不出现滚动条，那么网页的clientWidth和scrollWidth应该相等。但是实际上，不同浏览器有不同的处理，这两个值未必相等...
How to create a cron job using Bash automatically without the interactive editor?
...r what I found here and elsewhere I came up with this:
The Code
command="php $INSTALL/indefero/scripts/gitcron.php"
job="0 0 * * 0 $command"
cat <(fgrep -i -v "$command" <(crontab -l)) <(echo "$job") | crontab -
I couldn't figure out how to eliminate the need for the two variables witho...
栈和队列的面试题Java实现 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...就能保证min存放的是最小值。但是这样的话，会存在一个问题：如果最小的元素出栈了，那怎么知道剩下的元素中哪个是最小的元素呢？
改进思路：
这里需要加一个辅助栈，用空间换取时间。辅助栈中，栈顶永远保存着当前...
How to set thousands separator in Java?
...atSymbols(new Locale("pt", "BR")));
BigDecimal value = new BigDecimal(123456.00);
System.out.println(df.format(value.floatValue()));
// results: "123.456,00"
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