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Creating temporary files in bash
...standard, but it does exist on many platforms. The "X"s will generally get converted into some randomness, and more will probably be more random; however, some systems (busybox ash, for one) limit this randomness more significantly than others
By the way, safe creation of temporary files is impor...
add a string prefix to each value in a string column using Pandas
...
If you load you table file with dtype=str
or convert column type to string df['a'] = df['a'].astype(str)
then you can use such approach:
df['a']= 'col' + df['a'].str[:]
This approach allows prepend, append, and subset string of df.
Works on Pandas v0.23.4, v0.24.1. ...
Why am I seeing “TypeError: string indices must be integers”?
... to get github issues into a readable form. Using the advice on How can I convert JSON to CSV? I came up with this:
6 Ans...
error: passing xxx as 'this' argument of xxx discards qualifiers
... {
return name;
}
This is necessary because now you can call getId() and getName() on const objects as:
void f(const StudentT & s)
{
cout << s.getId(); //now okay, but error with your versions
cout << s.getName(); //now okay, but error with your versions
}
As a s...
Linq to Sql: Multiple left outer joins
...where you'd be better off using DataContext.ExecuteCommand(...) instead of converting to linq.
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What is the relationship between Looper, Handler and MessageQueue in Android?
I have checked the official Android documentation/guide for Looper , Handler and MessageQueue . But I couldn't get it. I am new to android, and got very confused with these concepts.
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What's the difference between String(value) vs value.toString()
...cation, the [[DefaultValue]] internal operation.
Briefly summarized, when converting from Object-to-String, the following steps are taken:
If available, execute the toString method.
If the result is a primitive, return result, else go to Step 2.
If available, execute the valueOf method.
If t...
Can a JSON value contain a multiline string
...on tool. Link . It allows you to write text multi-lined in editor and then converts it to the proper valid JSON format. Note: it adds '\n' characters for the new lines, but you can simply delete them in any text editor with the "Replace all.." function.
P.S. Should be a comment to the question, bu...
Insert, on duplicate update in PostgreSQL?
...mple 38-2. Exceptions with UPDATE/INSERT
This example uses exception handling to perform either UPDATE or INSERT, as appropriate:
CREATE TABLE db (a INT PRIMARY KEY, b TEXT);
CREATE FUNCTION merge_db(key INT, data TEXT) RETURNS VOID AS
$$
BEGIN
LOOP
-- first try to update the key...
Is it possible to use Razor View Engine outside asp.net
...ing that T4 templates can only be changed at compile time, the .tt file is converted to and saved as a .cs file. In my usage a semi- technical user would like to update the template without having to rebuild the application. Is there an easy way that this can be achieved using T4 templates?
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