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How should one use std::optional?
...archy, instead of passing around some "phantom" value "assumed" to have a "error" meaning.
– Luis Machuca
Oct 3 '13 at 16:35
1
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Is there a foreach loop in Go?
...mplement a foreach loop.
func PrintXml (out io.Writer, value interface{}) error {
var data []byte
var err error
for _, action := range []func() {
func () { data, err = xml.MarshalIndent(value, "", " ") },
func () { _, err = out.Write([]byte(xml.Header)) },
func...
How to set the part of the text view is clickable
...s function because when I am just pasting your in onCreate method it shows error.
– BlackBlind
Apr 24 '19 at 10:17
1
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Django South - table already exists
...
Although the table "myapp_tablename" already exists error stop raising
after I did ./manage.py migrate myapp --fake, the DatabaseError shows
no such column: myapp_mymodel.added_field.
Got exactly the same problem!
1.Firstly check the migration number which is causing th...
Allowed memory size of 33554432 bytes exhausted (tried to allocate 43148176 bytes) in php
This error message is being presented, any suggestions?
21 Answers
21
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What is the difference between save and insert in Mongo DB?
...11000 duplicate key ->Insert a new doc inside the collection.
error index:
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How to allocate aligned memory only using the standard library?
...n successful completion, posix_memalign() shall return zero; otherwise, an error number shall be returned to indicate the error.
Either or both of these could be used to answer the question now, but only the POSIX function was an option when the question was originally answered.
Behind the scenes...
Sleeping in a batch file
...nput redirection - trivial example:
C:\>echo 1 | timeout /t 1 /nobreak
ERROR: Input redirection is not supported, exiting the process immediately.
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Correct Bash and shell script variable capitalization
...OB_HOME JOB_LOG JOB_TEMP JOB_RUN_CONTROL
Constants: LOG_DEBUG LOG_INFO LOG_ERROR STATUS_OK STATUS_ERROR STATUS_WARNING
Use "snake case" (all lowercase and underscores) for all variables that are scoped to a single script or a block.
Examples: input_file first_value max_amount num_errors
Use mixed...
How to echo with different colors in the Windows command line
...nologo /out:"%~n0.exe" "%~dpsfnx0"
)
%~n0.exe %*
endlocal & exit /b %errorlevel%
*/
import System;
var arguments:String[] = Environment.GetCommandLineArgs();
var newLine = false;
var output = "";
var foregroundColor = Console.ForegroundColor;
var backgroundColor = Console.BackgroundColor;
...