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How to create a CPU spike with a bash command
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You can also do
dd if=/dev/zero of=/dev/null
To run more of those to put load on more cores, try to fork it:
fulload() { dd if=/dev/zero of=/dev/null | dd if=/dev/zero of=/dev/null | dd if=/dev/zero of=/dev/null | dd if=/dev/zero of=/dev/nu...
Git submodule add: “a git directory is found locally” issue
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This is what ultimately worked for me (this article helped out a lot):
If you haven't already run git rm --cached path_to_submodule (no trailing slash) as well as rm -rf path_to_submodule, do that!
Then:
Delete the relevant lines from the .gitmodules file. e.g. delete these:
[submodule "path...
Programmatically get the version number of a DLL
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This works if the dll is .net or Win32. Reflection methods only work if the dll is .net. Also, if you use reflection, you have the overhead of loading the whole dll into memory. The below method does not load the assembly into memory.
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Clean ways to write multiple 'for' loops
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The first thing is that you don't use such a data structure. If
you need a three dimensional matrix, you define one:
class Matrix3D
{
int x;
int y;
int z;
std::vector<int> myData;
public:
// ...
int& operator()( int i, int j, int k )
{
re...
add a string prefix to each value in a string column using Pandas
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thank you. if of interest, dataframe indexes also support such string manipulations.
– tagoma
Jul 10 '17 at 21:30
2
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How does Angular $q.when work?
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Calling $q.when takes a promise or any other type, if it is not a promise then it will wrap it in a promise and call resolve. If you pass a value to it then it is never going to be rejected.
From the docs:
Wraps an object that might be a value or a (3rd party) then-able ...
Replace multiple characters in a C# string
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So how do we write if we want to replace multiple characters with multiple characters?
– Habip Oğuz
Dec 24 '19 at 23:30
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How do I exchange keys with values in a dictionary?
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What if values are not unique? Then the keys should be a list... for example: d = {'a':3, 'b': 2, 'c': 2} {v:k for k,v in d.iteritems()} {2: 'b', 3: 'a'} should be {2: ['b','c'], 3: 'a'}
– Hanan Shteingart
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Storing custom objects in an NSMutableArray in NSUserDefaults
...dataRepresentingSavedArray = [currentDefaults objectForKey:@"savedArray"];
if (dataRepresentingSavedArray != nil)
{
NSArray *oldSavedArray = [NSKeyedUnarchiver unarchiveObjectWithData:dataRepresentingSavedArray];
if (oldSavedArray != nil)
objectArray = [[NSMutableArray alloc] initWit...
Append column to pandas dataframe
... way probably only matters when you consider edge cases. For instance here if both DataFrames had a 'data' column the join would fail, whereas a concat would give you two columns named 'data'.
– U2EF1
Dec 16 '13 at 20:37
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