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How to know what the 'errno' means?
...uman-readable string for the error number. This is the same string printed by perror() but it's useful if you're formatting the error message for something other than standard error output.
For example:
#include <errno.h>
#include <string.h>
/* ... */
if(read(fd, buf, 1)==-1) {
p...
Find and replace string values in list
...mparison between this list comprehension method and the map method (posted by @Anthony Kong), this list method was roughly 2x faster. Also it allowed for inserting multiple replacements into the same call, e.g. resname = [name.replace('DA', 'ADE').replace('DC', 'CYT').replace('DG', 'GUA').replace('D...
Hide hidden(dot) files in github atom editor
... you want to hide normal files/folders just add them to this box separated by a Comma , for example : .*, Videos, Music
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IBOutlet and IBAction
...ne a button and label in IB. To dynamically change the value of the label by pushing the button, you will define an action and property in your app similar to:
UILabel IBOutlet *myLabel;
- (IBAction)pushme:(id)sender;
Then in IB you would connect myLabel with the label and connect the pushme met...
Invoking JavaScript code in an iframe from the parent page
...and the function you want to call is targetFunction():
document.getElementById('targetFrame').contentWindow.targetFunction();
You can also access the frame using window.frames instead of document.getElementById.
// this option does not work in most of latest versions of chrome and Firefox
window...
In vim, how do I get a file to open at the same line number I closed it at last time?
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Finally someone points out that my .viminfo is owned by root for some reason! This needs to be in the other 100 documentations that I read.
– Jack
May 29 '15 at 22:19
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How to format a java.sql Timestamp for displaying?
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Very elegant. Just to be clear, the formatting produced by the example here looks like 05/30/17 00:39:18.
– Noumenon
May 30 '17 at 4:41
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Could not load file or assembly 'xxx' or one of its dependencies. An attempt was made to load a prog
...ilt for "Any CPU". f you're in Visual Studio, you can check for everything by going to the "x86" or "Any CPU" menu (next to the "Debug"/"Release" menu) on the toolbar at the top of the screen and clicking "Configuration Manager..."
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Sass .scss: Nesting and multiple classes?
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You can use the parent selector reference &, it will be replaced by the parent selector after compilation:
For your example:
.container {
background:red;
&.desc{
background:blue;
}
}
/* compiles to: */
.container {
background: red;
}
.container.desc {
back...
Android custom dropdown/popup menu
...etContentView(R.layout.activity_main);
button1 = (Button) findViewById(R.id.button1);
button1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
//Creating the instance of PopupMenu
PopupMenu pop...