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How to remove certain characters from a string in C++?
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// output: 555 5555555
cout << str << endl;
To use as function:
void removeCharsFromString( string &str, char* charsToRemove ) {
for ( unsigned int i = 0; i < strlen(charsToRemove); ++i ) {
str.erase( remove(str.begin(), str.end(), charsToRemove[i]), str.end() )...
Unresolved external symbol on static class members
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If you are using C++ 17 you can just use the inline specifier (see https://stackoverflow.com/a/11711082/55721)
If using older versions of the C++ standard, you must add the definitions to match your declarations of X and Y
unsigned char test::X;
unsigned char test::Y;
somewhere. You might...
Programmatically set left drawable in a TextView
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Using Kotlin:
You can create an extension function or just use setCompoundDrawablesWithIntrinsicBounds directly.
fun TextView.leftDrawable(@DrawableRes id: Int = 0) {
this.setCompoundDrawablesWithIntrinsicBounds(id, 0, 0, 0)
}
If you need to resize the drawable...
Ruby replace string with captured regex pattern
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Does “\d” in regex mean a digit?
...MAScript Matching Behavior" section in Regular Expression Options.
Info: https://docs.microsoft.com/en-us/dotnet/standard/base-types/character-classes-in-regular-expressions#decimal-digit-character-d
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Aggregate / summarize multiple variables per group (e.g. sum, mean)
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Using the data.table package, which is fast (useful for larger datasets)
https://github.com/Rdatatable/data.table/wiki
library(data.table)
df2 <- setDT(df1)[, lapply(.SD, sum), by=.(year, month), .SDcols=c("x1","x2")]
setDF(df2) # convert back to dataframe
Using the plyr package
require(pl...
Remove substring from the string
...info can be seen in the documentation about other versions as well:
http://www.ruby-doc.org/core/classes/String.html#method-i-slice-21
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Ways to save Backbone.js model data?
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Are default enum values in C the same for all compilers?
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What is a bank conflict? (Doing Cuda/OpenCL programming)
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