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Easiest way to check for an index or a key in an array?
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To check if the element is set (applies to both indexed and associative array)
[ ${array[key]+abc} ] && echo "exists"
Basically what ${array[key]+abc} does is
if array[key] is set, return abc
if array[key] is not set, return nothing
References:
See Parame...
Can you animate a height change on a UITableViewCell when selected?
...that reports the original height normally via the tableView: heightForRowAtIndexPath:, then when you want to animate a height change, simply change the value of the variable and call this...
[tableView beginUpdates];
[tableView endUpdates];
You will find it doesn't do a full reload but is enough ...
How do I tidy up an HTML file's indentation in VI?
How do I fix the indentation of his huge html files which was all messed up?
11 Answers
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Using arrays or std::vectors in C++, what's the performance gap?
...en from the internet):
// Comparison of assembly code generated for basic indexing, dereferencing,
// and increment operations on vectors and arrays/pointers.
// Assembly code was generated by gcc 4.1.0 invoked with g++ -O3 -S on a
// x86_64-suse-linux machine.
#include <vector>
struct...
How do I write LINQ's .Skip(1000).Take(100) in pure SQL?
...with the @skip! The row_number approach does NOT have this (only tested on indexed order). For lo @Skip less about 20, the new syntax is faster than the row_number approach though.
– Eske Rahn
Jun 24 '18 at 14:23
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Are there any free Xml Diff/Merge tools available? [closed]
...:Merge has now been replaced by Oso XML Merge: osocorporation.com/xmlmerge/index.php
– leetNightshade
Aug 4 '16 at 23:48
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EF Migrations: Rollback last applied migration?
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The name of the migration with index 0 is $InitialDatabase.
– MEMark
Sep 9 '14 at 19:52
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How to index characters in a Golang string?
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Try this to get the charecters by their index
package main
import (
"fmt"
"strings"
)
func main() {
str := strings.Split("HELLO","")
fmt.Print(str[1])
}
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TokuMX vs. MongoDB 性能对比 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...。
Currently unsupported functionality
● dropDups option for unique indexes
● Background Indexing, the “background” option is ignored when creating indexes.
● Fulltext indexes
● Geospatial indexes
磁盘消耗对比：
选择MongoDB就必然会面对磁盘消耗的问...
how do I make a single legend for many subplots with matplotlib?
...label('time (hours)')
ax.set_ylabel('CONC ($\mu g. m^{-3}$)')
for index in range(len(level)):
conc = dados.variables['CONC'][4:12,index] * 1e9
ax.plot(conc,label=str(level[index])+'m')
dados.close()
ax.legend(bbox_to_anchor=(1.05, 0), loc='lower left', borderaxespad=0....