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Convert data.frame columns from factors to characters
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The global option
stringsAsFactors:
The default setting for arguments of data.frame and read.table.
may be something you want to set to FALSE in your startup files (e.g. ~/.Rprofile). Please see help(options).
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Truncating all tables in a Postgres database
I regularly need to delete all the data from my PostgreSQL database before a rebuild. How would I do this directly in SQL?
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How to grant permission to users for a directory using command line in Windows?
...ing from the *nix world and being used to 'chown/chmod' to give access and set permissions via the CLI, this thread has been very helpful.
– bgarlock
Oct 27 '15 at 14:40
6
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How to determine CPU and memory consumption from inside a process?
...tly used by current process" and then
SIZE_T physMemUsedByMe = pmc.WorkingSetSize;
CPU currently used:
#include "TCHAR.h"
#include "pdh.h"
static PDH_HQUERY cpuQuery;
static PDH_HCOUNTER cpuTotal;
void init(){
PdhOpenQuery(NULL, NULL, &cpuQuery);
// You can also use L"\\Process...
Ruby on Rails: How do I add placeholder text to a f.text_field?
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For those using Rails(4.2) Internationalization (I18n):
Set the placeholder attribute to true:
f.text_field :attr, placeholder: true
and in your local file (ie. en.yml):
en:
helpers:
placeholder:
model_name:
attr: "some placeholder text"
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How to get the input from the Tkinter Text Widget?
... zero (ie: the very first character). END is an imported constant which is set to the string "end". The END part means to read until the end of the text box is reached. The only issue with this is that it actually adds a newline to our input. So, in order to fix it we should change END to end-1c(Tha...
How to search for occurrences of more than one space between words in a line
... the digits, commas and new lines but select the middle space such as data set of
20171106,16632 ESCG0000018SB
20171107,280 ESCG0000018SB
20171106,70476 ESCG0000018SB
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Alternatives to gprof [closed]
What other programs do the same thing as gprof?
7 Answers
7
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How do you embed binary data in XML?
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Maybe encode them into a known set - something like base 64 is a popular choice.
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Floating point vs integer calculations on modern hardware
...t as scalar addss. (Use -march=native to allow using whatever instruction sets your CPU supports, not just the SSE2 baseline for x86-64).
– Peter Cordes