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Read first N lines of a file in python
...ced in .net c#, however would like to do this in python to simplify things and out of interest.
16 Answers
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How to switch back to 'master' with git?
...nitely not tracked in the index, you can just remove the directory locally and you'll get it back when you git checkout branch1.
– Platinum Azure
Sep 14 '11 at 13:46
1
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What Does Question Mark Mean in Xcode Project Navigator?
... Thanks. In case someone else reads this, just right click on the file and goto Source Control->Add. This will turn ? to A. So, basically: ? means not part of source control. A means added to source control, but not modified. M means it is added to source control and is modified.
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How to use a switch case 'or' in PHP
...icated" statements, eg: to test if a value is "greater than 3", "between 4 and 6", etc. If you need to do something like that, stick to using if statements, or if there's a particularly strong need for switch then it's possible to use it back to front:
switch (true) {
case ($value > 3) :
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Change Name of Import in Java, or import two classes with the same name
...iasing mechanism in Java. You cannot import two classes with the same name and use both of them unqualified.
Import one class and use the fully qualified name for the other one, i.e.
import com.text.Formatter;
private Formatter textFormatter;
private com.json.Formatter jsonFormatter;
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Are there pronounceable names for common Haskell operators? [closed]
I'm reading Learn You a Haskell for Great Good , and I never know how to pronounce the Haskell operators. Do they have "real" names? ?
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Sorting rows in a data table
...taView that you create from your original DataTable. Apply whatever sorts and/or filters you want on the DataView and then create a new DataTable from the DataView using the DataView.ToTable method:
DataView dv = ft.DefaultView;
dv.Sort = "occr desc";
DataTable sortedDT = dv.ToTable();
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Does VBA have Dictionary Structure?
...t Scripting Runtime'). As per @regjo's comment, go to Tools->References and tick the box for 'Microsoft Scripting Runtime'.
Create a dictionary instance using the code below:
Set dict = CreateObject("Scripting.Dictionary")
or
Dim dict As New Scripting.Dictionary
Example of use:
If Not ...
How do you use a variable in a regular expression?
I would like to create a String.replaceAll() method in JavaScript and I'm thinking that using a regex would be most terse way to do it. However, I can't figure out how to pass a variable in to a regex. I can do this already which will replace all the instances of "B" with "A" .
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PHP: How to remove specific element from an array?
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Use array_search to get the key and remove it with unset if found:
if (($key = array_search('strawberry', $array)) !== false) {
unset($array[$key]);
}
array_search returns false (null until PHP 4.2.0) if no item has been found.
And if there can be m...