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count the frequency that a value occurs in a dataframe column
...iple columns in a df
[my_series[c].value_counts() for c in list(my_series.select_dtypes(include=['O']).columns)]
https://stackoverflow.com/a/28192263/786326
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Is it possible to clone html element objects in JavaScript / JQuery?
...od:
// Create a clone of element with id ddl_1:
let clone = document.querySelector('#ddl_1').cloneNode( true );
// Change the id attribute of the newly created element:
clone.setAttribute( 'id', newId );
// Append the newly created element on element p
document.querySelector('p').appendChild( cl...
Extract value of attribute node via XPath
...ou ignore the Parent node altogether and use:
//child/@name
you can select name attribute of all child nodes in one go.
name="Child_2"
name="Child_4"
name="Child_1"
name="Child_3"
name="Child_1"
name="Child_2"
name="Child_4"
name="Child_3"
...
jQuery .scrollTop(); + animation
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Your callback will execute twice, by the way, because you selected two elements.
– Big McLargeHuge
Oct 31 '14 at 18:26
8
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Amend a commit that wasn't the previous commit [duplicate]
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Have I misunderstood? It seems you actually have to select a commit before the one you want to change. If sha1 is the hash of the commit you want to change, you'd specify sha1^ on the rebase command. Otherwise, the commit to change doesn't appear in the list.
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How do I check if a given Python string is a substring of another one? [duplicate]
...ever you are looking for make a regex-group auto of it, afterwards you can select the 3rd group.
– Cutton Eye
Feb 8 '18 at 15:35
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Apply style to parent if it has child with css [duplicate]
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It's not possible with CSS3. There is a proposed CSS4 selector, $, to do just that, which could look like this (Selecting the li element):
ul $li ul.sub { ... }
See the list of CSS4 Selectors here.
As an alternative, with jQuery, a one-liner you could make use of would be th...
Swift equivalent of [NSBundle bundleForClass:[self class]]
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The selected answer did not work for me in a static method of a UIView subclass, but I found this:
Bundle(for: self.classForCoder)
This also works when you want to get the Bundle within a test target.
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记一次数据库表自增长（Auto Increment）故障 - 数据库(内核) - 清泛网 - ...
...么我们不妨换个思路，显式设置唯一标识，比如说通过「SELECT MAX … FOR UPDATE」的方式直接查询得到唯一标识符，并在稍后执行的 INSERT 语句中显式设置。
不过这种方法不够透明，需要修改业务代码，更透明的方法是使用触发器...
oracle:完整剖析PL/SQL DEVELOPER与SQL PLUS字符集设置 - 数据库(内核) - ...
...的'unicode support'
该选项的说明是：
Unicode enabled.
When selected, Unicode data will be fetched as such from the Oracle Server, and displayed as Unicode text. When disabled, Unicode data from the server will be converted to the character set of the Oracle Client, in accordance with t...