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How to estimate how much memory a Pandas' DataFrame will need?
...ing, say, a 400MB csv file into a pandas dataframe (using read_csv or read_table), is there any way to guesstimate how much memory this will need? Just trying to get a better feel of data frames and memory...
...
How to replace a character by a newline in Vim
...is ASCII control characters list is different from a complete ASCII symbol table, in that the control characters, which are inserted into a console/pseudoterminal/Vim via the Ctrl key (haha), can be found there.
Whereas in C and most other languages, you usually use the octal codes to represent thes...
How to Test a Concern in Rails
...p the database accordingly (because your dummy class won't have a database table backing it). Moreover, you'll want to not only test the concern but also test the concern's behavior inside your model specs.
So why not kill two birds with one stone? By using RSpec's shared example groups, you can te...
must appear in the GROUP BY clause or be used in an aggregate function
I have a table that looks like this caller 'makerar'
7 Answers
7
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What is so bad about singletons? [closed]
...The problem is (as I see it), that the things that Singleton brings to the table in these cases are irrelevant. (Construct-on-first-use is trivial to implement in a non-singleton, for example, even if it's not actually using the constructor to do it.)
– dash-tom-bang
...
Multiline TextView in Android?
...quip ex ea commodo consequat."></TextView>
You can do this with TableRow, see below code
<TableRow >
<TextView
android:id="@+id/tv_description_heading"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
...
Difference between Statement and PreparedStatement
...tes and other special characters"; instead, it performs separation of executable SQL and data, sending the parameters to the DBMS as separate packets of information after the SQL has been converted into a query plan.
– IMSoP
Sep 13 '16 at 15:02
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jQuery - checkbox enable/disable
...hkcc9").on('click', function() {
$(this)
.parents('table')
.find('.group1')
.prop('checked', $(this).is(':checked'));
});
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How to chain scope queries with OR instead of AND?
...
Use ARel
t = Person.arel_table
results = Person.where(
t[:name].eq("John").
or(t[:lastname].eq("Smith"))
)
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...
Is Meyers' implementation of the Singleton pattern thread safe?
...d to as "Magic Statics" in the "C++11 Core Language Features: Concurrency" table here: msdn.microsoft.com/en-us/library/vstudio/hh567368.aspx
– olen_garn
Mar 27 '13 at 16:41
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