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What does “Object reference not set to an instance of an object” mean? [duplicate]
...rs and booleans or structures (and can be identified because they inherit from System.ValueType). Boolean variables, when declared, have a default value:
bool mybool;
//mybool == false
Reference types, when declared, do not have a default value:
class ExampleClass
{
}
ExampleClass exampleClass...
Is there a way to 'uniq' by column?
...tion to limit the width to the tmp_fixed_width.
3) Remove trailing spaces from the column to "restore" it's width (assuming there were no trailing spaces beforehand).
printf "%s" "$str" \
| awk '{ tmp_fixed_width=15; uniq_col=8; w=tmp_fixed_width-length($uniq_col); for (i=0;i<w;i++) { $uniq_col...
Open and write data to text file using Bash?
...
Newbies would benefit from knowing exactly what to do with this file. How to save it, how to run it, etc.
– Danny
Sep 22 '16 at 5:52
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Get Root Directory Path of a PHP project
...works when you have two levels of directories. Right? I mean, when call it from base_project_directory/folder1/folder2/folder3/file.php it doesn't return the base_project_directory.
– Ali Khalili
Apr 12 '19 at 15:03
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process.env.NODE_ENV is undefined
...ODE_ENV=development on my Mac terminal before doing a react-native run-ios from the same terminal. When debugging, the value of process.env.NODE_ENV is undefined.
– Ash
Jun 26 '19 at 5:54
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Put icon inside input element in a form
...e image is positioned over (z axis) the input, so it blocks clicks over it from focusing on the input (this can be observed in the snippet). It's possible to resolve by sending the image under the input
– G0BLiN
Jul 12 at 19:20
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The requested operation cannot be performed on a file with a user-mapped section open
...ing "in my case it was due to X". Every developer on Windows would benefit from adding procexp and procmon to their toolbelt!
– Matt Wanchap
Feb 21 at 5:29
add a comment
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Using multiple delimiters in awk
...on 2 different distros and I get the same behavior: I want to get the port from netstat -ntpl "netstat -ntpl |sed 's/:/ /' |awk '{print $5}' " works but could do without doulbe piping This works but I was not expecting the data on field 17: "netstat -ntpl |awk -F" |:" '{print $17}'"
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Simple regular expression for a decimal with a precision of 2
...t could be wrong, but you don't actually know if 1.7 is 1.70 or any number from 1.70 to 1.74.
– paxdiablo
Nov 21 '08 at 9:17
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How do I force make/GCC to show me the commands?
...make V=1
Other suggestions here:
make VERBOSE=1 - did not work at least from my trials.
make -n - displays only logical operation, not command line being executed. E.g. CC source.cpp
make --debug=j - works as well, but might also enable multi threaded building, causing extra output.
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