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How can mixed data types (int, float, char, etc) be stored in an array?
... first check the type, then use the corresponding member of the union. A switch statement is useful:
switch (my_array[n].type) {
case is_int:
// Do stuff for integer, using my_array[n].ival
break;
case is_float:
// Do stuff for float, using my_array[n].fval
break;
case is_char:
...
When should I use malloc in C and when don't I?
...mewhere in the read-only part of the memory and you just have a pointer to it. You can use the string as read-only. You cannot make changes to it. Example:
some_memory[0] = 'h';
Is asking for trouble.
On the other hand
some_memory = (char *)malloc(size_to_allocate);
is allocating a char arra...
Associative arrays in Shell scripts
...add to Irfan's answer, here is a shorter and faster version of get() since it requires no iteration over the map contents:
get() {
mapName=$1; key=$2
map=${!mapName}
value="$(echo $map |sed -e "s/.*--${key}=\([^ ]*\).*/\1/" -e 's/:SP:/ /g' )"
}
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How can I validate a string to only allow alphanumeric characters in it?
... string using Regular Expressions to only allow alphanumeric characters in it?
10 Answers
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Can I “multiply” a string (in C#)?
...
And it's not much more in .NET 3.5: String.Concat(Enumerable.Repeat("Hello", 4).ToArray())
– Mark Foreman
Sep 3 '12 at 0:54
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Hide the cursor of an UITextField
I am using a UITextField with a UIPickerView for its inputView , so that when the user taps the text field, a picker is summoned for them to select an option from.
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Disabling swap files creation in vim
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To disable swap files from within vim, type
:set noswapfile
To disable swap files permanently, add the below to your ~/.vimrc file
set noswapfile
For more details see the Vim docs on swapfile
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Determine if code is running as part of a unit test
I have a unit test (nUnit). Many layers down the call stack a method will fail if it is running via a unit test.
19 Answers...
How to run a PowerShell script without displaying a window?
How is it possible to run a PowerShell script without displaying a window or any other sign to the user?
11 Answers
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How do I tell git-svn about a remote branch created after I fetched the repo?
I'm using git-svn to work against my company's central Subversion repository. We've recently created a new feature branch in the central repo.
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