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How is an HTTP POST request made in node.js?
...a))
res.on('end', () => {
let body = Buffer.concat(chunks);
switch(res.headers['content-type']) {
case 'application/json':
body = JSON.parse(body);
break;
}
...
Combine two columns of text in pandas dataframe
...
if both columns are strings, you can concatenate them directly:
df["period"] = df["Year"] + df["quarter"]
If one (or both) of the columns are not string typed, you should convert it (them) first,
df["period"] = df["Year"].astype(str) + df["quarter"]
Beware...
How to run Gulp tasks sequentially one after the other
... you return a stream in task one, e.g. return gulp.src('app/**/*.js').pipe(concat(app.js)).pipe(gulp.dest('app/scripts');, the key is to identify task one as a dependent when defining task two: gulp.task('two', ['one'], function() {... Task two will now wait for task one to end before running.
...
Split value from one field to two
...It's almost invariably a lot faster to join columns together with a simple concatenation (when you need the full name) than it is to split them apart with a character search.
If, for some reason you cannot split the field, at least put in the extra columns and use an insert/update trigger to popula...
Why can I add named properties to an array as if it were an object?
...cts, just slightly modified (with a few more functions).
Functions like:
concat
every
filer
forEach
join
indexOf
lastIndexOf
map
pop
push
reverse
shift
slice
some
sort
splice
toSource
toString
unshift
valueOf
share
...
Get current domain
... mostly importantly it includes the port number so that I do not need to concat it afterwards. phpinfo suggested by bsdnoobz helps me to find the right solution though.
– user1021364
Aug 8 '14 at 4:14
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Count the items from a IEnumerable without iterating?
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...in cases where things like Enumerable.Concat are used to combine a large collection which knows a lot about itself with a small one that doesn't.
– supercat
Feb 19 '15 at 20:16
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How does the String class override the + operator?
...ls of the string conversion context.
15.18.1.
Optimization of String Concatenation :
An implementation may choose to perform conversion and concatenation
in one step to avoid creating and then discarding an intermediate
String object. To increase the performance of repeated string
conc...
c# datatable to csv
...able<string> fields = row.ItemArray.Select(field =>
string.Concat("\"", field.ToString().Replace("\"", "\"\""), "\""));
sb.AppendLine(string.Join(",", fields));
}
And last suggestion, you could write the csv content line by line instead of as a whole document, to avoid having a...
Java multiline string
...
Furthermore, the first version will be automatically concatenated by the compiler, since all the strings are known at compile time. Even if the strings are not known at compile time, it's no slower than StringBuilder or String.format(). The only reason to avoid concatenation wi...